PREHISTORIC LIFE

A

Aardonyx - Dinosaur, sauropodomorph.
Abelisaurus - Dinosaur, abelisaur.
Abrictosaurus - Dinosaur, heterodontosaurid.
Abrosaurus - Dinosaur, sauropod.
Abydosaurus - Dinosaur, sauropod.
Abyssosaurus - Plesiosaur.
Acamptonectes - Marine reptile, ichthyosaur.
Acanthodes - Fish, spiny shark.
Acanthopholis - Dinosaur, nodosaurid.
Acanthostega - Amphibian, temnospondyl.
Achelousaurus - Dinosaur, ceratopsian.
Acherontiscus - Amphibian.
Acleistorhinus - Parareptile.
Acheloma - Amphibian, temnospondyl.
Acherontisuchus - Crocodile.
Achillesaurus - Dinosaur, alvarezsaur.
Achillobator - Dinosaur, dromaeosaur.
Acinacodus - Mammal.
Acinonyx pardinensis (Giant cheetah) - Mammal, cheetah.
Acristatherium - Mammal, eutherian.
Acristavus - Dinosaur, hadrosaur.
Acrocanthosaurus - Dinosaur, carcharodontosaur.
Acrophyseter - Mammal, whale (predatory).
Acrotholus - Dinosaur, pachycephalosaur.
Acteosaurus - Aquatic reptile.
Adamantinasuchus - Crocodylomorph, notosuchian.
Adamantisaurus - Dinosaur, sauropod.
Adapis - Mammal, primate.
Adasaurus - Dinosaur, dromaeosaur.
Adelobasileus - Mammaliamorph.
Adelogyrinus - Amphibian.
Adelospondylus - Amphibian.
Adelphailurus - Mammal, machairodont.
Adeopapposaurus - Dinosaur, sauropodomorph.
Adilophontes - Mammal, amphicyonid.
Adocus - Turtle.
Adriosaurus - Marine reptile.
Aegirocassis - Anomalocaridid.
Aegirosaurus - Marine reptile, ichthyosaur.
Aegisuchus - Crocodile.
Aegyptopithecus - Mammal, primate.
Aegyptosaurus - Dinosaur, sauropod.
Aelurodon - Mammal, canid (borophagine).
Aelurognathus - Gorgonopsid.
Aelurosaurus - Gorgonopsid.
Aenigmastropheus - Protosaur.
Aeolosaurus - Dinosaur, titanosaur.
Aepyceros datoadeni - Mammal, impala.
Aerosteon - Dinosaur, allosaur.
Aerotitan - Pterosaur, azhdarchid.
Aetiocetus - Mammal, whale (predatory/baleen).
Aetobarbakinoides - Aetosaur.
Aetodactylus - Pterosaur, ornithocheirid.
Aetosauroides - Aetosaur.
Aerosaurus - Dinosaur, pelycosaur?.
Afrasia - Mammal, primate.
Afrocyon - Mammal, amphicyonid.
Afrodon - Mammal, eutherian.
Afropithecus - Mammal, primate.
Afrovenator - Dinosaur, megalosaur.
Afrosmilus - Mammal, barbourofelid.
Agathaumas - Dinosaur, ceratopsian.
Agilisaurus - Dinosaur.
Agilodocodon - Mammaliaforme.
Agnosphitys - Dinosauromorph?
Agnotherium - Mammal, amphicyonid.
Agorophius - Whale.
Agriotherium - Mammal, bear.
Aguascalientia - Mammal, camel.
Agujaceratops - Dinosaur, ceratopsian.
Agustinia - Dinosaur, sauropod.
Ahshislepelta - Dinosaur, ankylosaur.
Aigialosaurus - Marine reptile.
Ajkaceratops - Dinosaur, ceratopsian.
Akaimia - Fish, carpet shark.
Akidolestes - Mammal.
Alamitornis - Bird.
Alamosaurus - Dinosaur, sauropod.
Alanqa - Pterosaur, azhdarchid.
Alaskacephale - Dinosaur, pachycephalosaur.
Albalophosaurus - Dinosaur, ceratopsian.
Albertaceratops - Dinosaur, ceratopsian.
Albertadromeus - Dinosaur, ornithopod.
Albertonectes - Plesiosaur, elasmosaurid.
Albertosaurus - Dinosaur, tyrannosaur.
Albinykus - Dinosaur, alvarezsaur.
Albionbatrachus - Frog.
Aldabrachampsus - Crocodile.
Alectrosaurus - Dinosaur, tyrannosaur.
Aleosteus - Fish, placoderm.
Aletopelta - Dinosaur, ankylosaur.
Alexeyisaurus - Marine reptile, elasmosaurid plesiosaur.
Alioramus - Dinosaur, tyrannosaur.
Allodaposuchus - Crocodile.
Allonnia - Chancelloriid.
Allopleuron - Turtle.
Allosaurus - Dinosaur, allosaur.
Allenypterus - Fish.
Alnashetri - Dinosaur, alvarezsauroid.
Alocodon - Dinosaur, ornithischiam.
Aloposaurus - Gorgonopsid.
Alphadon - Mammal.
Alrausuchus - Therapsid, biarmosuchian.
Altenglanerpeton - Amphibian.
Altirhinus - Dinosaur, iguanodont/hadrosauroid.
Altispinax - Dinosaur, theropod.
Alvarezsaurus - Dinosaur. alvarezsaur.
Alwalkeria - Dinosaur.
Alxasaurus - Dinosaur, therizinosauroid.
Amargasaurus - Dinosaur, sauropod.
Amargatitanis - Dinosaur, titanosaur.
Amazonsaurus - Dinosaur, sauropod.
Ambulocetus - Mammal, whale ancestor.
Amebelodon - Elephant, gomphothere.
American zebra (Equus simplicidens) - Mammal, horse.
Ammosaurus - Dinosaur, prosauropod.
Ampelosaurus - Dinosaur, sauropod.
Amphekepubis - Marine reptile.
Amphicoelias - Dinosaur, sauropod.
Amphicyanis - Mammal, amphicyonid.
Amphicyon - Mammal, amphicyonid (bear dog).
Amplectobelua - Anomalocaridid.
Amtocephale - Dinosaur, pachycephalosaur.
Amurosaurus - Dinosaur, hadrosaur.
Anabisetia - Dinosaur, ornithopod.
Anancus - Mammal, elephant.
Anarosaurus - Marine reptile - pachypleurosaur.
Anasazisaurus - Dinosaur, hadrosaur.
Anatosuchus - Crocodile.
Ancalecetus - Whale.
Anchiceratops - Dinosaur, ceratopsian.
Anchiornis - Dinosaur, maniraptoran.
Anchisaurus - Dinosaur.
Anchitherium - Mammal, horse.
Anconastes - Amphibian, temnospondyl.
Ancylotherium - Mammal, chalicothere.
Andalgalornis - Bird, phorusrhacid.
Angelosaurus - Pelycosaur.
Andesaurus - Dinosaur, sauropod.
Andrewsarchus - Mammal.
Andrewsiphius - Whale.
Andrewsornis - Bird, phorusrhacid.
Angistorhinus - Phytosaur.
Angolachelys - Turtle.
Angolasaurus - Marine reptile, mosasaur.
Angolatitan - Dinosaur, sauropod.
Angulomastacator - Dinosaur, hadrosaurid.
Angustinaripterus - Pterosaur, rhamphorhynchid.
Anhanguera - Pterosaur, ornithocheirid.
Aniksosaurus - Dinosaur, coelurosaur.
Animantarx - Dinosaur, nodosaur.
Ankylosaurus - Dinosaur, ankylosaur.
Anningasaura - Plesiosaur.
Anodontosaurus - Dinosaur, ankylosaur.
Anomalocaris - Cambrian lifeform.
Anomocephalus - Therapsid.
Anomoiodon - Parareptile.
Anoplosaurus - Dinosaur, nodosaurid.
Anserimimus - Dinosaur, ornithomimosaur.
Antarctopelta - Dinosaur, nodosaur.
Antarctosaurus - Dinosaur, sauropod.
Antarctosuchus - Temnospondyl.
Anteophthalmosuchus - Crocodylomorph.
Antetonitrus - Dinosaur, sauropod.
Anteosaurus - Therapsid.
Anthodon - Pareiasaur.
Anthracodromeus - Reptile.
Anthracosaurus - Reptiliomorph.
Anurognathus - Pterosaur, anurognathid.
Anzu - Oviraptosaur.
Aorun - Dinosaur, coelurosaur.
Apachesaurus - Temnospondyl.
Apatomerus - Marine reptile, plesiosaur?
Apatosaurus - Dinosaur, sauropod.
Aphrosaurus - Marine reptile, plesiosaur.
Aplestosuchus - Crocodylomorph, notosuchian.
Appalachiosaurus - Dinosaur, tyrannosaur.
Apsaravis - Bird.
Apsisaurus - Synapsid, varanopid.
Apterodon - Mammal. creodont.
Aptychodon - Marine reptile, plesiosaur.
Aquila-bullockensis - Bird of prey, eagle.
Arachana - Amphibian, temnospondyl.
Araeoscelis - Reptile, diapsid.
Aragosaurus - Dinosaur, sauropod.
Aralazhdarcho - Pterosaur, azdarchid.
Aralosaurus - Dinosaur, hadrosaur.
Arambourgiania - Pterosaur, azhdarchid.
Arandaspis - Fish.
Araripedactylus - Pterosaur, pterodactyloid.
Araripesaurus - Pterosaur, ornithocheirid.
Araripesuchus - Crocodile.
Archaeoceratops - Dinosaur, ceratopsian.
Archaeodontosaurus - Dinosaur, sauropod.
Archaeoindris - Mammal, primate, sloth lemur.
Archaeoistiodactylus - Pterosaur, istiodactylid.
Archaeolemur - Primate, lemur.
Archaeonectrus - Marine reptile, plesiosaur/pliosaur?
Archaeopteryx - Bird.
Archaeornithoides - Dinosaur, troodont.
Archaeornithomimus - Dinosaur, ornithomimosaur.
Archaeosyodon - Therapsid, dinocephalin.
Archaeotherium - Mammal, entelodont.
Archaeothyris - Pelycosaur.
Archaeovenator - Reptile, varanopid.
Archelon - Marine reptile, turtle.
Archeopelta - Archosauriform, doswelliid.
Archeria - Reptiliomorph.
Arcovenator - Dinosaur, abelisaur.
Arctamphicyon - Mammal, amphicyonid.
Arctodus (Short faced bear) - Mammal, bear.
Arctognathus - Gorgonopsid.
Arctops - Gorgonopsid.
Arcusaurus - Dinosaur, sauropodomorph.
Arenysaurus - Dinosaur, hadrosaur.
Arenysuchus - Crocodile.
Arganaceras - Pareiasaur.
Arganarhinus - Phytosaur.
Argentavis - Bird, teratorn.
Argentinosaurus - Dinosaur, sauropod (titanosaur).
Argyrosaurus - Dinosaur, sauropod.
Aristonectes - Marine reptile, plesiosaur (elasmosaurid?).
Aristosuchus - Dinosaur, theropod.
Arizonasaurus - Rauisuchian.
Arkharavia - Dinosaur, sauropoda.
Armadillosuchus - Crocodile.
Armbruster's Wolf - Mammal, wolf.
Arrhinoceratops - Dinosaur, ceratopsian.
Arsinoitherium - Mammal, arsinoitheriid.
Arthrolycosa - Spider.
Arthropleura - Arthropod.
Arthropterygius - Marine reptile, ichthyosaur.
Arthurdactylus - Pterosaur, ornithocheirid.
Artiocetus - Whale.
Ashorocetus - Mammal, cetacean.
Asiaceratops - Dinosaur, ceratopsian.
Asiatosaurus - Dinosaur, sauropod.
Asilisaurus - Dinosauromorph.
Aspidorhynchus - Fish.
Aspidosaurus - Temnospondyl.
Asprosaurus - Lizard, varanoid.
Astraspis - Fish.
Astrapotherium - Mammal.
Astrodon - Dinosaur, sauropod.
Astrohippus - Mammal, horse.
Astrophocaudia - Dinosaur, sauropod.
Asylosaurus - Dinosaur, sauropodomorph.
Atacamatitan - Dinosaur, sauropod.
Athabascasaurus - Marine reptile, ichthyosaur.
Atlantochelys - Turtle, protostegid.
Atlantosaurus - Dinosaur, sauropod.
Atlas bear (Ursus-arctos-crowtheri) - Bear.
Atlascopcosaurus - Dinosaur, ornithopod.
Atlasaurus - Dinosaur, sauropod.
Atopodentatus - marine reptile, strange toothed.
Atrociraptor - Dinosaur, theropod.
Atsinganosaurus - Sauropod, titanosaur.
Attenborosaurus - Marine reptile, plesiosaur.
Attercopus - Arachnidm uraraneid.
Attockicetus - Mammal, cetacean.
Atychodracon - Pliosaur.
Aublysodon - Dinosaur, tyrannosaur.
Aucasaurus - Dinosaur, abelisaur.
Augustaburiania - Tanystropheid.
Augustasaurus - Marine reptile, pistosaurid.
Augustynolophus - Dinosaur, hadrosaur.
Aulophyseter - Mammal, whale (predatory).
Auroraceratops - Dinosaur, neoceratopsian.
Aurornis - Dinosaur/bird?.
Aussiedraco - Pterosaur, ornithocheirid.
Australobarbarus - Dicynodont.
Australodocus - Dinosaur, sauropod.
Australosyodon - Therapsid, anteosaurid.
Australovenator - Dinosaur, allosaur.
Austriadactylus - Pterosaur, campylognathoid.
Austrocheirus - Dinosaur, theropod.
Austroptyctodus - Fish, placoderm.
Austroraptor - Dinosaur, dromaeosaur.
Austrosaurus - Dinosaur, sauropod (titanosaur).
Avaceratops - Dinosaur, ceratopsian.
Avalonnectes - Plesiosaur, rhomaleosaurid.
Aviatyrannis - Dinosaur, tyrannosaur.
Avimimus - Dinosaur, oviraptorid.
Avitabatrachus - Frog.
Azendohsaurus - Archosauromorph.
Azhdarcho - Pterosaur, azdarchid.

B

Babakotia - Mammal, primate, sloth lemur.
Babiacetus - Mammal, whale.
Bagaceratops - Dinosaur, ceratopsian.
Bagaraatan - Dinosaur, theropod.
Baguatherium - Mammal, pyrothere.
Bahariasaurus - Dinosaur, theropod.
Bainoceratops - Dinosaur, ceratopsian.
Bakonybatrachus - Amphibian.
Bakonydraco - Pterosaur, azhdarchid.
Balaur - Dinosaur, dromaeosaurid.
Balochisaurus - Dinosaur, titanosaur.
Bambiraptor - Dinosaur, dromaeosaur.
Banffia - Cambrian lifeform.
Baotianmansaurus - Dinosaur, sauropod (titanosauriform).
Barapasaurus - Dinosaur, sauropod.
Barbourofelis - Mammal, barbourofelid/false sabre-toothed cat.
Barosaurus - Dinosaur, sauropod.
Barracudasauroides - Marine reptile, ichthyosaur.
Barracudasaurus - Marine reptile, ichthyosaur.
Barreirosuchus - Notosuchian.
Barrosasaurus - Dinosaur, sauropod.
Barylambda - Mammal, pantodont.
Baryonyx - Dinosaur, spinosaur.
Barytherium - Mammal, elephant.
Bashkyroleter - Parareptile.
Bashuchelys - Turtle.
Basilosaurus - Mammal, whale (predatory).
Basiloterus - Whale.
Batrachognathus - Pterosaur, anurognathid.
Batrachotomus - Rauisuchian.
Batyrosaurus - Dinosaur, hadrosauroid.
Baurutitan - Dinosaur, sauropod (titanosaur).
Bavarisaurus - Reptile.
Bawitius - Fish, polypterid.
Becklespinax - Dinosaur, theropod.
Beelzebufo - Amphibian, frog.
Beipiaopterus - Pterosaur, ctenochasmatid.
Beipiaosaurus - Dinosaur, therizinosaur.
Beishanlong - Dinosaur, ornithomimosaur.
Beiyanerpeton - Amphibian.
Belantsea - Fish.
Belebey - Parareptile.
Bellubrunnus - Pterosaur, rhamphorhyncid.
Bellusaurus - Dinosaur, sauropod.
Bennettazhia - Pterosaur, azhdarchoid.
Benthosuchus - Amphibian, temnospondyl.
Belodon - Phytosaur.
Berberosaurus - Dinosaur, theropod.
Bernissartia - Crocodile.
Berycopsis - Fish.
Besanosaurus - Marine reptile, ichthyosaur.
Betasuchus - Dinosaur, abelisaur?.
Biarmosuchus - Therapsid.
Bicentenaria - Dinosaur, coelurosaur.
Bissektipelta - Dinosaur, ankylosaur.
Bistahieversor - Dinosaur, tyrannosaur.
Blikanasaurus - Dinosaur, sauropodomorph.
Bogolubovia - Pterosaur, azhdarchid.
Bolong - Dinosaur, hadrosaur.
Bonapartenykus - Dinosaur, alvarezsaur.
Bonatitan - Dinosaur, sauropod (titanosaur).
Bonitasaura - Dinosaur, sauropod (titanosaur).
Borealonectes - Pliosaur< rhomaleosaurid.
Borealosaurus - Dinosaur, sauropod (titanosaur).
Borealosuchus - Crocodile.
Boreaspis - Jawless fish.
Boreopterus - Dinosaur, tyrannosaur.
Borhyaena - Mammal, borhyaenid.
Borophagus - Mammal, canid.
Bothriolepis - Fish, placoderm.
Bothriospondylus - Dinosaur, sauropod (titanosaur).
Brachauchenius - Marine reptile, pliosaur.
Brachiosaurus - Dinosaur, sauropod (titanosaur).
Brachyceratops - Dinosaur, ceratopsian.
Brachychampsa - Crocodile.
Brachycyon - Mammal, amphicyonid.
Brachyhyops - Mammal, entelodont.
Brachylophosaurus - Dinosaur, hadrosaur.
Brachypterygius - Ichthyosaur.
Brachysuchus - Phytosaur.
Brachytrachelopan - Dinosaur, sauropod.
Bradysaurus - Pareiasaur.
Branisella - Mammal, Primate.
Brasileodactylus - Pterosaur, pterodactyloid.
Breviceratops - Dinosaur, ceratopsian.
Brindabellaspis - Fish, placoderm.
Brithopus - Therapsid, dinocephalian.
Brodavis - Bird, hesperornithiform.
Brohisaurus - Dinosaur, sauropod.
Bromsgroveia - Rauisuchian, poposaurid.
Brontomerus - Dinosaur, sauropod.
Brontornis - Bird, phorusrhacid.
Brontoscorpio - Sea scorpion.
Broomicephalus - Gorgonopsid.
Bruhathkayosaurus - Dinosaur, sauropod.
Brygmophyseter - Mammal, whale (predatory).
Bryopompilus - Insect, spider wasp.
Buitreraptor - Dinosaur, dromaeosaur.
Bullacephalus - Biarmosuchian.
Bullockornis - Bird, dromornithid.
Burnetia - Biarmosuchian.
Byronosaurus - Dinosaur, troodont.

C

Cachiyacuy - Mammal, caviomorph.
Cacibupteryx - Pterosaur, rhamphorhynchid.
Cacops - Amphibian, temnospondyl.
Calcarichelys - Marine reptile, turtle.
Californosaurus - Marine reptile, ichthyosaur.
Callawayasaurus - Marine reptile, elasmosaurid plesiosaur.
Callawayia - Marine reptile, ichthyosaur.
Calsoyasuchus - Crocodile.
Camarasaurus - Dinosaur, sauropod.
Camarillasaurus - Dinosaur, theropod/ceratosaur.
Camelops - Mammal, camel.
Camelotia - Dinosaur, sauropodomorph.
Cameroceras - Orthocone.
Camptosaurus - Dinosaur, ornithopod.
Campylodoniscus - Dinosaur, titanosaur.
Campylognathoides - Pterosaur, campylognathoidid.
Canaanimys - Mammal, caviomorph.
Canadaspis - Cambrian lifeform.
Canadia - Cambrian lifeform.
Canis apolloniensis - Mammal, wolf.
Canis armbrusteri - Mammal, wolf.
Canis dirus - Mammal, wolf.
Canis edwardii - Mammal, wolf.
Canis falconeri - Mammal, wolf.
Canis ferox - Mammal, wolf.
Canis lepophagus - Mammal, wolf.
Canobius - Fish.
Captorhinus - Reptile, captorhinid.
Carbonemys - Turtle.
Carcharocles angustidens - Fish, shark.
Carcharocles auriculatus - Fish, shark.
Carcharocles chubutensis - Fish, shark.
Carcharocles megalodon - Fish, shark.
Carcharodon hubbelli - Fish, hark.
Carcharodontosaurus - Dinosaur, carcharadontosaur.
Cardabiodon - Shark.
Carinodens - Mosasaur.
Caririsuchus - Notosuchian.
Carnotaurus - Dinosaur, abelisaur.
Carnufex - Crocodylomorph.
Carolinacetus - Mammal, cetacean.
Carniadactylus - Pterosaur, campylognathoidid.
Carsosaurus - Marine reptile.
Cartorhynchus - Ichthyosauriform.
Caryonosuchus - Crocodylomorph, notosuchian.
Casea - Pelycosaur.
Caseosaurus - Dinosaur, theropod.
Casineria - Amniote?
Castoroides (Giant Beaver) - Giant Beaver.
Cathartesaura - Dinosaur, sauropod.
Cathayopterus - Pterosaur, ctenochasmatid.
Caudipteryx - Dinosaur, oviraptosaur.
Caulkicephalus - Pterosaur, ornithocheirid.
Caviramus - Pterosaur, campylognathoidid.
Caypullisaurus - Marine reptile, ichthyosaur.
Cearadactylus - Pterosaur, ornithocheirid.
Cedarosaurus - Dinosaur, sauropod.
Cedarpelta - Dinosaur, ankylosaur.
Cedrorestes - Dinosaur, ornithopod.
Celtedens - Amphibia, albanerpetontid.
Centenariosuchus - Crocodile, caiman.
Centrosaurus - Dinosaur, ceratopsian.
Cephalaspis - Fish.
Ceratodus - Fish.
Ceratogaulus (Horned Gopher) - Mammal.
Ceratonykus - Dinosaur, alvarezsaur.
Ceratosaurus - Dinosaur, ceratosaur.
Cerberophis - Snake.
Cerrejonisuchus - Crocodile.
Cervalces (Stag-moose) - Mammal, deer.
Cetiosauriscus - Dinosaur, sauropod.
Cetiosaurus - Dinosaur, sauropod.
Cetotherium - Mammal, whale.
Chalicotherium - Mammal, chalicothere.
Champsosaurus - Choristoderan.
Changchengopterus - Pterosaur, wukongopterid.
Chaoyangopterus - Pterosaur, azhdarchid.
Charitosaurus - Plesiosaur.
Charnia - Ediacaran lifeform.
Charonosaurus - Dinosaur, hadrosaur.
Charruodon - Therapsid, cynodont.
Chasmosaurus - Dinosaur, ceratopsian.
Cheirolepis - Fish.
Chelosphargis - Marine reptile, turtle.
Chialingosaurus - Dinosaur, stegosaur.
Chiayusaurus - Dinosaur, sauropod.
Chilantaisaurus - Dinosaur, allosaur.
Chilesaurus - Dinosaur, theropod.
Chilotherium - Mammal, rhinoceros.
Chindesaurus - Dinosaur, theropod.
Chinlea - Fish.
Chinshakiangosaurus - Dinosaur, sauropod.
Chirostenotes - Dinosaur, oviraptorid.
Chlynovia - Therapsid.
Chondrosteosaurus - Dinosaur, sauropod.
Chonecetus - Whale.
Chriacus - Mammal, condylarth.
Chrysocetus - Whale.
Chuandongocoelurus - Dinosaur, theropod.
Chuanjiesaurus - Dinosaur, sauropod.
Chubutisaurus - Dinosaur, titanosaur.
Chunerpeton - Salamander.
Chungkingosaurus - Dinosaur, stegosaur.
Chuxiongosaurus - Dinosaur, sauropod.
Cimoliasaurus - Marine reptile, plesiosaur.
Cimolichthys - Fish.
Circus dossenus (Wood Harrier) - Bird of prey, harrier.
Circus eylesi (Eyles' Harrier) - Bird of prey, harrier.
Cistecephalus - Therpsid, dicynodont.
Citipati - Dinosaur, oviraptorid.
Cladoselache - Fish, shark.
Clelandina - Gorgonopsid.
Clidastes - Marine reptile, mosasaur.
Climatius - Fish, spiny shark.
Coahuilaceratops - Dinosaur, ceratopsian.
Cobelodus - Fish, shark.
Coccosteus - Fish, placoderm.
Cochleosaurus - Amphibian, temnospondyl.
Coelodonta (Woolly rhino) - Mammal, rhino.
Coelophysis - Dinosaur, coelophysid.
Coelurosauravus - Reptile, coelurosauravid.
Coelurus - Dinosaur, coelurosaur.
Colepiocephale - Dinosaur, pachycephalosaur.
Coloborhynchus - Pterosaur, ornithocheirid.
Colossochelys - Turtle.
Colymbosaurus - Marine reptile, plesiosaur.
Comahuesaurus - Dinosaur, sauropod.
Comahuesuchus - Crocodile, notosuchian.
Comodactylus - Pterosaur, rhamphorhynchoid.
Compsognathus - Dinosaur, compsognathid.
Compsosuchus - Dinosaur, theropod, nosasaur?
Concavenator - Dinosaur, carcharodontosaur.
Concavispina - Thalattosaur.
Condorraptor - Dinosaur, megalosaur.
Confuciusornis - Bird.
Contectopalatus - Ichthyosaur.
Corosaurus - Pistosaur.
Coryphodon - Mammal, pantodont.
Corythosaurus - Dinosaur, hadrosaur.
Cotylorhynchus - Pelycosaur.
Craspedodon - Dinosaur, ceratopsian?
Crassigyrinus - Amphibian.
Cretolamna - Shark.
Cretoxyrhina - Fish, shark.
Crichtonsaurus - Dinosaur, ankylosaur.
Criocephalosaurus - Therapsid, dinocephalian.
Crocodylus anthropophagus - Crocodile.
Crocodylus falconensis - Crocodile.
Crocodylus thorbjarnarsoni - Crocodile.
Crocuta crocuta spelaea (Cave hyena) - Mammal, hyena.
Cronopio - Mammal.
Crusafontia - Mammal.
Cruxicheiros - Dinosaur, theropod.
Cryolophosaurus - Dinosaur, theropod.
Cryopterygius - Ichthyosaur, ophthalmosaurid.
Cryptoclidus - Marine reptile, plesiosaur.
Cryptosaurus - Dinosaur, ankylosaur.
Cteniogenys - Reptile.
Ctenochasma - Pterosaur, ctenochasmatid.
Ctenosauriscus - Rauisuchian, ctenosauriscid.
Ctenospondylus - Pelycosaur.
Ctenurella - Fish, placoderm.
Culebrasuchus - Crocodile, caiman.
Cuspicephalus - Pterosaur.
Cuvieronius - Mammal, elephant.
Cyamodus - Marine reptile, placodont.
Cyclotosaurus - Amphibian, temnospondyl.
Cycnorhamphus - Pterosaur, ctenochasmatid.
Cymatosaurus - Marine reptile, pistosauroid.
Cymbospondylus - Marine reptile, ichthyosaur.
Cynelos - Mammal, amphicyonid.
Cynodictis - Mammal, amphicyonid.
Cynognathus - Therapsid, cynodont.
Cynosaurus - Cynodont.
Cynthiacetus - Whale, archaeocetid.
Cyonosaurus - Gorgonopsid.
Cypretherium - Mammal, entelodont.
Czatkowiella - Archosauromorph.

D

Daanosaurus - Dinosaur, sauropod. Dacentrurus - Dinosaur, stegosaur. Dactylosaurus - Marine reptile. Daemonosaurus - Dinosaur, theropod. Daeodon - Mammal, entelodont. Dahalokely - Dinosaur, theropod (abelisaur?). Dakosaurus - Crocodile (marine). Dallasaurus - Marine reptile, mosasaur ancestor. Daphoenictis - Mammal, amphicyonid. Daphoenodon - Mammal, amphicyonid. Daphoenus - Mammal, amphicyonid. Dartmuthia - Jawless fish. Darwinopterus - Pterosaur, wukongopterid. Dashanpusaurus - Dinosaur, sauropod. Daspletosaurus - Dinosaur, tyrannosaur. Datanglong - Dinosaur, theropod. Datousaurus - Dinosaur, sauropod. Dawndraco - Pterosaur, pteranodont. Daxiatitan - Dinosaur, sauropod (titanosaur). Deinocheirus - Dinosaur, ornithomimosaur. Deinogalerix - Mammal. Deinonychus - Dinosaur, dromaeosaurid. Deinosuchus - Crocodile. Deinotherium - Mammal, elephant. Delapparentia - Dinosaur, iguanodont. Deltadromeus - Dinosaur, theropod. Deltavjatia - Parieasaur. Deltoptychius - Fish, chimaeriform. Demandasaurus - Dinosaur, sauropod. Dendrorhynchoides - Pterosaur, anurognathid. Desmatosuchus - Aetosaur. Desmostylus - Mammal, desmostylid. Deuterosaurus - Therapsid, dinocephalian. Devincenzia - Bird, phorusrhacid. Diabloceratops - Dinosaur, ceratopsian. Diacodexis - Mammal. Diadectes - Reptiliomorph. Diadiaphorus - Mammal, litoptern. Diamantinasaurus - Dinosaur, sauropod (titanosaur). Diandongosuchus - Rauisuchian, poposaurid. Dicraeosaurus - Dinosaur, sauropod. Dicynodon - Therapsid, dicynodont. Didelphodon - Mammal, marsupial. Diictodon - Therapsid, dicynodont. Dilong - Dinosaur, tyrannosaur. Dilophosaurus - Dinosaur, theropod. Dimetrodon - Pelycosaur. Dimorphodon - Pterosaur, dimorphodont. Dinaelurus - Mammal, nimravid. Dinailurictis - Mammal, nimravid. Dinheirosaurus - Dinosaur, sauropod. Dinichthys - Fish, placoderm. Dinictis - Mammal, nimravid. Dinocephalosaurus - Dinosaur, tanystropheid. Dinocrocuta - Mammal, percrocutid. Dinodontosaurus - Dicynodont. Dinofelis - Mammal, big cat. Dinogorgon - Gorgonopsid. Dinohippus - Mammal, horse. Dinopithecus - Mammal, primate (giant baboon). Diorocetus - Whale, mysticetid. Diplocaulus - Amphibian. Diplocynodon - Crocodile. Diplodocus - Dinosaur, sauropod. Diplomoceras - Ammonite. Diplomystus - Fish. Diplovertebron - Amphibian, eogyrinid. Dipnorhynchus - Fish. Diprotodon - Mammal, giant wombat. Dipterus - Fish. Dire Wolf - Mammal, wolf. Discosaurus - Plesiosaur. Dissopsalis - Mammal, creodont. Djupedalia - Plesiosaur, cryptoclidid. Doedicurus - Mammal, glyptodont. Dolerosaurus - Tetrapod. Dolichorhynchops - Marine reptile, plesiosaur. Dolichosaurus - Marine reptile. Doliosauriscus - Therapsid, dinocephalian. Dollosaurus - Mosasaur. Domeykodactylus - Pterosaur, dsungaripterid. Dongbeititan - Dinosaur, sauropod. Dongyangopelta - Dinosaur, nodosaur. Dongyangosaurus - Dinosaur, sauropod (titanosaur). Dorudon - Mammal, whale. Doryaspis - Jawless fish. Dorygnathus - Pterosaur, rhamphorhynchid. Doswellia - Archosauriform, doswelliid. Dracopelta - Dinosaur, ankylosaur. Dracorex - Dinosaur, pachycephalosaur. Dracovenator - Dinosaur, theropod. Drassonax - Mammal, amphicyonid. Dreadnoughtus - Dinosaur, sauropod (titanosaur). Drepanaspis - Jawless fish. Drepanosaurus - Drepanosaur. Drinker - Dinosaur, hypsilophodontid. Driveria - Synapsid, dinocephalian. Dromaeosauroides - Dinosaur, dromaeosaur. Dromaeosaurus - Dinosaur, dromaeosaurid. Dromornis - Bird, dromornithid. Drusilasaura - Dinosaur, sauropod. Dryadissector - Varanoid lizard. Dryopithecus - Mammal, primate. Dryosaurus - Dinosaur, ornithopod. Dryptosaurus - Dinosaur, tyrannosaur. Dsungaripterus - Pterosaur, dsungaripterid. Dubreuillosaurus - Dinosaur, megalosaur. Duffinselache - Shark. Dunkleosteus - Fish, placoderm. Dunyu - Jawless fish. Duriatitan - Dinosaur. Duriavenator - Dinosaur, megalosaur. Dvinia - Therapsid, cynodont. Dyoplosaurus - Dinosaur, ankylosaur. Dyrosaurus - Crocodile. Dystrophaeus - Dinosaur, sauropod.

E

Eastmanosteus - Fish, placoderm.
Echinodon - Dinosaur, heterodontosaur.
Ectenosaurus - Mosasaur.
Edaphosaurus - Pelycosaur.
Edestus - Fish, shark.
Edgarosaurus - Marine reptile, plesiosaur.
Edmarka - Dinosaur, theropod.
Edmontonia - Dinosaur, nodosaur.
Effigia - Rauisuchian.
Efraasia - Dinosaur, sauropodomorph.
Eidolosaurus - Mosasaur.
Einiosaurus - Dinosaur, ceratopsian.
Ekorus - Mammal, mustelid.
Ekrixinatosaurus - Dinosaur, abelisaurid.
Elaltitan - Dinosaur, sauropod.
Elaphrosaurus - Dinosaur, theropod.
Elanodactylus - Pterosaur, ctenochasmatid.
Elasmosaurus - Marine reptile, elasmosaurid plesiosaur.
Elasmotherium - Mammal, rhino.
Elegestolepis - Fish, shark.
Elginerpeton - Amphibian, temnospondyl.
Elginia - Pareiasaur.
Elmisaurus - Dinosaur, oviraptorid.
Embasaurus - Dinosaur, theropod.
Embolotherium - Mammal, brontothere.
Embrithosaurus - Pareiasaur.
Emeroleter - Parareptile, procolophonomorph.
Enaliarctos - Mammal, pinniped.
Enchodus - Fish (sabre-toothed herring).
Endothiodon - Dicynodont.
Enigmosaurus - Dinosaur, therizinosaur.
Ennatosaurus - Pelycosaur.
Entelodon - Mammal, entelodont.
Eoabelisaurus - Dinosaur, abelisaur.
Eoalulavis - Bird.
Eoarctops - Gorgonops.
Eoazhdarcho - Pterosaur, azdarchid.
Eobasileus - Mammal, dinoceratan.
Eobothus - Fish.
Eobrontosaurus - Dinosaur, sauropod.
Eocaecilia - Amphibian, caecilian.
Eocaiman - Crocodile.
Eocarcharia - Dinosaur, theropod.
Eocetus - Mammal, whale.
Eocursor - Dinosaur, ornithischian.
Eocyclotosaurus - Amphibian, temnospondyl.
Eodromaeus - Dinosaur.
Eoentelodon - Mammal, entelodont.
Eofelis - Mammal, nimravid.
Eogyrinus - reptilomorph, eogyrinid.
Eoherpeton - Reptilomorph.
Eolambia - Dinosaur, hadrosauroid.
Eomaia - Mammal.
Eomamenchisaurus - Dinosaur, sauropod.
Eomanis - Mammal, pangolin.
Eomysticetus - Whale.
Eonatator - Mosasaur.
Eoneustes - Thalattosuchian (Marine crocodile).
Eoplectreurys - Spider.
Eoplesiosaurus - Plesiosaur.
Eopolycotylus - Marine reptile, plesiosaur.
Eopteranodon - Pterosaur, azdarchid.
Eoraptor - Dinosaur.
Eosimops - Dicynodont.
Eosinopteryx - Dinosaur, troodont.
Eosipterus - Pterosaur, pterodactylid.
Eothyris - Pelycosaur, eothyridid.
Eotitanosuchus - Therapsid, biarmosuchian.
Eotriceratops - Dinosaur, ceratopsian.
Eotyrannus - Dinosaur, tyrannosaur.
Epachthosaurus - Dinosaur, sauropod (titanosaur).
Epichirostenotes - Dinosaur, oviraptorid.
Epicyon - Mammal, canid.
Epidexipteryx - Dinosaur, scansoriopterygid.
Epihippus - Mammal, horse.
Equijubus - Dinosaur, hadrosauroid.
Equus simplicidens (American zebra/Hagerman horse) - Mammal, horse.
Erectopus - Dinosaur, carnosaur.
Eremiasaurus - Marine reptile, mosasaur.
Eremotherium - Mammal, ground sloth.
Erketu - Dinosaur, sauropod.
Erliansaurus - Dinosaur, therizinosaur.
Erlikosaurus - Dinosaur, therizinosaur.
Eromangasaurus - Marine reptile, elasmosaurid plesiosaur.
Erpetonyx - Parareptile.
Erpetosuchus - Reptile, erpetosuchid.
Eryops - Amphibian, temnospondyl.
Erythrosuchus - Archosaur.
Eshanosaurus - Dinosaur.
Estemmenosuchus - Therapsid.
Estesia - Reptile, anguimorph.
Eucnemesaurus - Dinosaur, sauropodomorph.
Eucritta - Amphibian.
Eucyon - Mammal, canid.
Eudibamus - Reptile, procolophonomorph.
Eudimorphodon - Pterosaur, campylognathid.
Euhelopus - Dinosaur, sauropod.
Eumetabolodon - Reptile, procolophonid.
Eunotosaurus - Parareptile.
Euoplocephalus - Dinosaur, ankylosaur.
Euparkeria - Archosaur.
Eurazhdarcho - Pterosaur, azdarchid.
Eurhinodelphis - Mammal, cetacean.
Eurhinosaurus - Marine reptile, ichthyosaur.
Euroamphicyon - Mammal, amphicyonid.
Europasaurus - Dinosaur, sauropod.
Europejara - Pterosaur, tapejarid.
Eurotamandua - Mammal, pangolin?
Eurypterus - Eurypterid.
Euskelosaurus - Dinosaur, sauropodomorph.
Eusmilus - Mammal, nimravid.
Eusthenopteron - Lobe finned fish.
Eustreptospondylus - Dinosaur, megalosaur.
Excalibosaurus - Marine reptile, ichthyosaur.
Eyles' Harrier (Circus eylesi) - Bird of prey, harrier.

F

Fabrosaurus - Dinosaur, ornithischian.
Fadenia - Cartilaginous fish.
Falcarius - Dinosaur, therizinosaur.
Falcatus - Fish, shark.
Fasolasuchus - Rausuchian.
Faxinalipterus - Pterosaur.
Fedexia - Amphibian, temnospondyl.
Feilongus - Pterosaur, ornithocheird.
Ferganasaurus - Dinosaur, sauropod.
Foxemys - Turtle, pleurodiran.
Francosuchus - Phytosaur.
Fresnosaurus - Marine reptile, plesiosaur.
Fruitadens - Dinosaur, heterodont.
Fruitafossor - Mammal.
Fukuiraptor - Dinosaur, allosaur.
Fukuisaurus - Dinosaur, hadrosaur.
Fukuititan - Dinosaur, sauropod (titanosaur).
Fusuisaurus - Dinosaur, sauropod.
Futalognkosaurus - Dinosaur, sauropod (titanosaur).

G

Galechirus - Therapsid, anomodont.
Galeops - Therapsid, anomodont.
Galepus - Therapsid, anomodont.
Galesaurus - Therapsid, cynodont.
Galesuchus - Therapsid, gorgonopsid.
Gallardosaurus - Marine reptile, pliosaur.
Gallimimus - Dinosaur, ornithomimosaur.
Galveosaurus - Dinosaur, sauropod.
Gandakasia - Whale, ambulocetid.
Ganzhousaurus - Dinosaur, oviraptorid.
Gargoyleosaurus - Dinosaur, nodosaur.
Garjainia - Archosaur, erythrosuchid.
Garudimimus - Dinosaur, ornithomimosaur.
Gasosaurus - Dinosaur, theropod.
Gasparinisaura - Dinosaur, ornithopod.
Gasparinisuchus - Notosuchian.
Gastonia - Dinosaur, ankylosaur.
Gastornis - Bird.
Gaviacetus - Whale, protocetid.
Gegepterus - Pterosaur, ctenochasmatid.
Geminiraptor - Dinosaur, troodont.
Gemuendina - Fish, placoderm.
Genyodectes - Dinosaur, ceratosaur.
Genyornis - Bird, dromornithid.
Georgiacetus - Whale, protocetid.
Geosaurus - Crocodile, metriorhynchid.
Gephyrosaurus - Rhynchocephalian.
Gephyrostegus - Reptilomorph.
Geranosaurus - Dinosaur, ornithopod.
Germanodactylus - Pterosaur, dsungaripterid.
Gerrothorax - Amphibian, temnospondyl.
Giganotosaurus - Dinosaur, carcharodontosaur.
Gigantophis - Snake.
Gigantopithecus - Mammal, primate.
Gigantoraptor - Dinosaur, oviraptorid.
Gigantosaurus - Dinosaur, sauropod.
Gigantspinosaurus - Dinosaur, stegosaur.
Gilchristosuchus - Crocodylomorph.
Gillicus - Fish.
Ginsburgsmilus - Mammal, barbourofelid.
Giraffatitan - Dinosaur, sauropod (titanosaur).
Glacialisaurus - Dinosaur, sauropodomorph.
Gladiobranchus - Fish, acanthodiian.
Gladioserratus - Shark.
Gladocephaloideus - Pterosaur.
Glanosuchus - Therapsid, schylacosaur.
Globidens - Marine reptile, mosasaur.
Glochinodontoides - Synapsid.
Glossotherium - Mammal, ground sloth.
Glyptodon - Mammal, glyptodont.
Gnathabelodon - Mammal, elephant.
Gnathosaurus - Pterosaur, ctenochasmatid.
Gobiatherium - Mammal, uintathere.
Gobiceratops - Dinosaur, ceratopsian.
Gobiconodon - Mammal.
Gobipteryx - Enantiornithine.
Gobisaurus - Dinosaur, ankylosaur.
Gobititan - Dinosaur, titanosaur.
Gobivenator - Dinosaur, troodont.
Gogonasus - Fish.
Gojirasaurus - Dinosaur, theropod.
Gomphodontosuchus - Therapsid, cynodont.
Gomphotherium - Mammal, elephant.
Gondwanatitan - Dinosaur, titanosaur.
Gongxianosaurus - Dinosaur, sauropod.
Gooloogongia - Fish.
Gorgonops - Gorgonopsid.
Gorgosaurus - Dinosaur, tyrannosaur.
Goronyosaurus - Mosasaur.
Goupilictis - Mammal, amphicyonid.
Goyocephale - Dinosaur, pachycephalosaur.
Graciliceratops - Dinosaur, ceratopsian.
Graciliraptor - Dinosaur, dromaeosaur.
Gracilisuchus - Archosaur, suchian.
Greererpeton - Amphibian, temnospondyl.
Griphodon - Mammal.
Griphognathus - Fish.
Grippia - Marine reptile, ichthyosaur.
Groenlandaspis - Fish, placoderm.
Gryphoceratops - Dinosaur, leptoceratopsid.
Gryponyx - Dinosaur, sauropodomorph.
Gryposaurus - Dinosaur, hadrosaur.
Gryposuchus - Crocodile.
Guaibasaurus - Dinosaur, sauropodomorph.
Guangxicyon - Mammal, amphicyonid.
Guanlong - Dinosaur, proceratosaur.
Guidraco - Pterosaur.
Guiyu - Fish.
Gwawinapterus - Pterosaur, istiodactylid.
Gwyneddosaurus - Archosaur, tanystropheid.
Gyposaurus - Dinosaur, sauropodomorph.
Gyroptychius - Fish.

H

Haasiasaurus - Mosasaur.
Haast's Eagle (Harpagornis moorei) - Bird of prey, eagle.
Hadrocodium - Mammaliaform.
Hadropithecus - Mammal, primate (lemur).
Hadrosaurus - Dinosaur. hadrosaur.
Hagerman horse (Equus simplicidens) - Mammal, horse.
Haikouichthys - Fish.
Hainosaurus - Marine reptile, mosasaur.
Halisaurus - Mosasaur.
Hallucigenia - Cambrian lifeform.
Halticosaurus - Dinosaur, theropod.
Hanssuesia - Dinosaur, pachycephalosaur.
Haopterus - Pterosaur, ornithocheirid.
Hapalops - Mammal, sloth.
Haplocanthosaurus - Dinosaur, sauropod.
Haplocheirus - Dinosaur, alvarezsaur.
Haplocyon - Mammal, amphicyonid.
Haplocyonoides - Mammal, amphicyonid.
Haplocyonopsis - Mammal, amphicyonid.
Haptodus - Pelycosaur, sphenacodont.
Haramiyavia - Mammal, haramiyida.
Harpactognathus - Pterosaur, rhamphorhynchid.
Harpagornis moorei (Haast's Eagle) - Bird of prey, eagle.
Harpagophagus - Mammal, amphicyonid.
Harpymimus - Dinosaur, ornithomimid.
Hassiacosuchus - Crocodile.
Hatzegopteryx - Pterosaur, azdarchid.
Hauffiopteryx - Marine reptile, ichthyosaur.
Hauffiosaurus - Pliosaur.
Heishanobaatar - Mammal.
Heleosaurus - Pelycosaur, varanopid.
Helicoprion - Fish, shark.
Heliobatis - Fish, ray.
Helioceratops - Dinosaur, ceratopsian.
Heliopithecus - Mammal, primate.
Helveticosaurus - Marine reptile, Archosaur?
Hemicyclaspis - Jawless fish.
Hemicyon - Mammal, dog-bear.
Hemipristis - Fish, Shark.
Henodus - Marine reptile, placodont.
Heptasuchus - Rauisuchian.
Herbstosaurus - Pterosaur, dsungaripterid.
Herpetoskylax - Therapsid, biarmosuchian.
Herrerasaurus - Dinosaur.
Hesperocyon - Mammal, canid.
Hesperornis - Bird.
Hesperosaurus - Dinosaur, stegosaur.
Heterodontosaurus - Dinosaur, heterodontosaur.
Hexatarsostinus - Plesiosaur.
Hexinlusaurus - Dinosaur, ornithopod.
Heyuannia - Dinosaur, oviraptosaur.
Himalayacetus - Whale, archaeocetid.
Himalayasaurus - Marine reptile, ichthyosaur.
Hipparion - Mammal, horse.
Hippidion - Mammal, horse.
Hipposaurus - Therapsid.
Histriasaurus - Dinosaur, sauropod.
Holoptychius - Fish.
Homalocephale - Dinosaur, pachycephalosaur.
Homalodotherium - Mammal, notoungulate.
Homotherium - Mammal, big cat.
Hongshanopterus - Pterosaur, ornithocheirid.
Hongshanornis - Bird, yanornithform.
Hoplitosaurus - Dinosaur, polacanthid.
Hoplophoneus - Mammal, nimravid.
Horned Gopher (Ceratogaulus) - Mammal.
Hovasaurus - Reptile.
Howesia - Rhynchosaur.
Huabeisaurus - Dinosaur, sauropod.
Huanghetitan - Dinosaur, sauropod.
Huanhepterus - pterosaur, ctenochasmatid.
Huaxiagnathus - Dinosaur, compsognathid.
Huayangosaurus - Dinosaur, stegosaur.
Hubbell's white shark - Fish, shark.
Hudiesaurus - Dinosaur, sauropod.
Hudsonelpidia - Marine reptile, ichthyosaur.
Huehuecanauhtlus - Dinosaur, hadrosaur.
Hungarobatrachus - Frog.
Hungarosaurus - Dinosaur, nodosaurid.
Hupehsuchus - Marine reptile.
Hurdia - Anomalocaridid.
Hutegotherium - Mammal, docodont.
Hyaenodon - Mammal, creodont.
Hybodus - Fish, shark.
Hydrodamalis (Steller's sea cow) - Mammal, sirenian.
Hydrotherosaurus - Marine reptile, plesiosaur.
Hylaeosaurus - Dinosaur, nodosaur.
Hylonomus - Reptile.
Hyneria - Lobe finned fish.
Hynerpeton - Amphibian - temnospondyl.
Hypacrosaurus - Dinosaur, hadrosaur.
Hypercoryphodon - Mammal, panotodont.
Hyperodapedon - Rhynchosaur.
Hypohippus - Mammal, horse.
Hypselosaurus - Dinosaur, titanosaur.
Hypselospinus - Dinosaur, iguanodont.
Hypsidoris - Fish.
Hypsocormus - Fish.
Hypsognathus - Parareptile.
Hyrachyus - Mammal, perissodactyl.
Hyracodon - Mammal, perissodactyl.
Hyracotherium - Mammal, primitive horse.

I

Ianthasaurus - Pelycosaur.
Iberomesornis - Bird.
Icaronycteris - Mammal, bat.
Ichthyodectes - Fish.
Ichthyornis - Bird.
Ichthyosaurus - Marine reptile - Ichthyosaur.
Ichthyostega - Amphibian, temnospondyl.
Ichthyovenator - Dinosaur, spinosaurid.
Ictidopsis - Cynodont.
Ictidorhinus - Therapsid, biarmosuchian.
Ictidostoma - Therapsid.
Ictidosuchoides - Therapsid, therocephalian.
Ictiocyon - Mammal, amphicyonid.
Ictitherium - Mammal, hyena.
Igdamanosaurus - Marine reptile, mosasaur.
Iguanacolossus - Dinosaur, iguanodont.
Iguanodon - Dinosaur, iguanodont.
Ikrandraco - Pterosaur.
Iliosuchus - Dinosaur, theropod.
Ilokelesia - Dinosaur, abelisaur.
Incisivosaurus - Dinosaur, oviraptosaur.
Indarctos - Mammal, bear.
Indocetus - Mammal, whale.
Indohyus - Mammal.
Indosaurus - Dinosaur, abelisaur.
Indosuchus - Dinosaur, abelisaur.
Iniopteryx - Fish, chimaera.
Inoceramus - Clam.
Inostrancevia - Gorgonopsid.
Iranotherium - Mammal, rhino.
Irish elk (Megaloceros) - Mammal, giant deer.
Irritator - Dinosaur, Spinosaur.
Isanosaurus - Dinosaur, sauropod.
Ischyodus - Fish, chimaeriform.
Ischyrocyon - Mammal, amphicyonid.
Isfjordosaurus - Marine reptile.
Isisaurus - Dinosaur, sauropod (titanosaur).
Isisfordia - Crocodile.
Istiodactylus - Pterosaur, istiodactylid.
Itasuchus - Notosuchian.
Itemirus - Dinosaur, dromaeosaur.
Iuticosaurus - Dinosaur. titanosaur.

J

Jaekelopterus - Eurypterid, (sea scorpion).
Jainosaurus - Dinosaur, sauropod.
Jamoytius - Jawless fish.
Janenschia - Dinosaur, sauropod (titanosaur).
Janjucetus - Mammal, whale.
Jaxartosaurus - Dinosaur, hadrosaur.
Jaxtasuchus - Archosaur, doswelliid.
Jeholodens - Mammal, eutriconodont.
Jeholopterus - Pterosaur, anurognathid.
Jeholornis - Bird.
Jeholosaurus - Dinosaur, ornithopod.
Jeyawati - Dinosaur, ornithopod (possibly hadrosaur).
Jianchangnathus - Pterosaur, rhamphorhynchid.
Jiangjunosaurus - Dinosaur, stegosaur.
Jiangshanosaurus - Dinosaur, titanosaur.
Jidapterus - Pterosaur, azhdarchid.
Jinanichthys - Fish.
Jinfengopteryx - Dinosaur, troodont.
Jingshanosaurus - Dinosaur, sauropodomorph.
Jintasaurus - Dinosaur, iguanodont.
Jiutaisaurus - Dinosaur, sauropod.
Jobaria - Dinosaur, sauropod.
Jonkeria - Therapsida.
Josephoartigasia - Mammal, giant rodent.
Jubbulpuria - Dinosaur, theropod.
Judiceratops - Dinosaur, ceratopsian.
Juramaia - Mammal.
Juratyrant - Dinosaur, tyrannosaur.
Juravenator - Dinosaur, compsognathid.

K

Kaatedocus - Dinosaur, sauropod.
Kaijiangosaurus - Dinosaur, theropod.
Kaiwhekea - Marine reptile, plesiosaur.
Kakuru - Dinosaur.
Kalimantsia - Mammal, chalicothere.
Kamagorgon - Therapsid.
Kangnasaurus - Dinosaur, dryosaurid.
Kannemeyeria - Therapsid, dicynodont.
Kapes - Parareptile.
Kaprosuchus - Crocodile.
Karaurus - Salamander.
Karongasaurus - Dinosaur, sauropod.
Kataria - Snake.
Kayentachelys - Turtle.
Kayentasuchus - Crocodylomorph, sphenosuchian.
Kayentatherium - Therapsid, cynodont.
Kayentavenator - Dinosaur.
Keichousaurus - Marine reptile.
Kekenodon - Whale.
Kelenken - Bird, phorusrhacid.
Kelmayisaurus - Dinosaur, carcharodontosaur.
Kentrosaurus - Dinosaur, stegosaur.
Kenyapithecus - Mammal, primate.
Kepodactylus - Pterosaur, pterodactyloid.
Keratocephalus - Therapsid, dinocephalian.
Kerberosaurus - Dinosaur, hadrosaur.
Kerygmachela - Cambrian lifeform.
Keuppia - Cephalopod, octopus.
Kharodacetus - Whale, protocetid
Khetranisaurus - Dinosaur, titanosaur.
Khoratpithecus - Mammal, primate.
Kileskus - Dinosaur, tyrannosaur.
Kimmerosaurus - Marine reptile, plesiosaur.
Kinnareemimus - Dinosaur, ornithomimosaur.
Klamelisaurus - Dinosaur, sauropod.
Knightia - Fish.
Kogiopsis - Mammal, whale (predatory).
Kol - Dinosaur, alvarezsaur.
Kollikodon - Monotreme mammal.
Komensaurus - Marine reptile, mosasaur.
Koolasuchus - Amphibian, temnospondyl.
Koparion - Dinosaur, troodontid?
Koreaceratops - Dinosaur, ceratopsian.
Koreanosaurus - Dinosaur, ornithopod.
Koshisaurus - Dinosaur, hadrosauroid.
Koskinonodon - Temnospondyl.
Kosmoceratops - Dinosaur, ceratopsian.
Kotasaurus - Dinosaur, sauropod.
Kourisodon - Mosasaur.
Kritosaurus - Dinosaur, hadrosaur.
Kronosaurus - Marine Reptile, pliosaur.
Kryostega - Temnospondyl.
Kryptops - Dinosaur, abelisaur.
Kubanochoerus - Mammal, pig.
Kulceratops - Dinosaur, ceratopsian.
Kundurosaurus - Dinosaur, hadrosaur.
Kunpengopterus - Pterosaur, wukongopterid.
Kuntinaru - Mammal, armadillo.
Kuri - Dog.
Kutchicetus - Whale, archaeocetid.
Kyrgyzsaurus - Protosaur, drepanosaurid.

L

Labidosaurikos - Captorhinid.
Labidosaurus - Captorhinid.
Labocania - Dinosaur, theropod (possible tyrannosaur).
Laccotriton - Salamander.
Lacusovagus - Pterosaur, azhdarchid.
Laganosuchus - Crocodile.
Lagosuchus - Dinosauromorph.
Lamaceratops - Dinosaur, ceratopsian.
Lambeosaurus - Dinosaur, hadrosaur.
Lamplughsaura - Dinosaur, sauropodomorph/sauropod.
Langobardisaurus - Archosaur, prolacertid.
Langstonia - Crocodylomorph, notosuchian.
Lanthanosuchus - Parareptile.
Laosaurus - Dinosaur, hypsilophodontid.
Lapampasaurus - Dinosaur, hadrosaurid.
Laplatasaurus - Dinosaur, sauropod (titanosaur).
Lapparentosaurus - Dinosaur, sauropod.
Laopteryx - Pterosaur.
Larachelus - Turtle.
Lariosaurus - Marine reptile, nothosaur.
Lasasaurus - Procolophonid.
Latirhinus - Dinosaur, hadrosaurid.
Latoplatecarpus - Marine reptile, mosasaur.
Lazarussuchus - Choristoderan.
Leaellynasaura - Dinosaur, hypsilophodont.
Leedsichthys - Fish.
Leidyosuchus - Crocodile.
Leinkupal - Dinosaur, sauropod.
Lemurosaurus - Therapsid, biarmosuchian.
Leonerasaurus - Dinosaur, sauropodomorph.
Lepidotes - Fish.
Leptictidium - Mammal.
Leptoceratops - Dinosaur, ceratopsian.
Leptochamops - Lizards.
Leptolepides - Fish.
Leptolepis - Fish.
Leptonectes - Marine reptile, ichthyosaur.
Leptopleuron - Reptile, procolophonomorph.
Leptorhynchos - Dinosaur, oviraptosaur.
Leptosuchus - Phytosaur.
Leshansaurus - Dinosaur, theropod.
Lesothosaurus - Dinosaur, ornithischian.
Lessemsaurus - Dinosaur, sauropodomorph.
Lexovisaurus - Dinosaur, stegosaur.
Liaoceratops - Dinosaur, neoceratopsian.
Liaoningopterus - Pterosaur, ornithocheirid.
Liaoningornis - Bird.
Liaoningosaurus - Dinosaur, ankylosaurid.
Liaoxipterus - Pterosaur, istiodactylid.
Ligabueino - Dinosaur, abelisauroid.
Ligabuesaurus - Dinosaur, sauropod (titanosaur).
Liliensternus - Dinosaur, theropod.
Limaysaurus - Dinosaur, sauropod.
Limnofregata - Bird.
Limnoscelis - Reptilomorph, diadectomorph.
Limusaurus - Dinosaur, theropod.
Linhenykus - Dinosaur, alvarezsaur.
Linheraptor - Dinosaur, dromaeosaur.
Linhevenator - Dinosaur, troodont.
Liodon - Mosasaur.
Liopleurodon - Marine reptile, pliosaur.
Lirainosaurus - Dinosaur, sauropod.
Litargosuchus - Crocodylomorph, sphenosuchian.
Livyatan - Mammal, whale (predatory).
Llanocetus - Whale.
Lobalopex - Therapsid, biarmosuchian.
Lonchodectes - Pterosaur, azhdarchid.
Lonchognathosaurus - Pterosaur, dsungaripterid.
Longchengpterus - Pterosaur, istiodactylid.
Longicrusavis - Bird, yanornithform.
Longisquama - Diapsid.
Lophorhinus - Therapsid, biarmosuchian.
Lophostropheus - Dinosaur, theropod.
Loricatosaurus - Dinosaur, stegosaur.
Loricosaurus - Dinosaur, sauropod (titanosaur).
Lorosuchus - Crocodylomorph, notosuchian.
Losillasaurus - Dinosaur, sauropod.
Lotosaurus - Archosaur, poposauroid.
Lourinhasaurus - Dinosaur, sauropod.
Lourinhanosaurus - Dinosaur, theropod.
Luanchuanraptor - Dinosaur, dromaeosaurid.
Ludodactylus - Pterosaur, ornithocheirid.
Lufengosaurus - Dinosaur, sauropodomorph.
Lufengpithecus - Mammal, primate.
Lukousaurus - Dinosaur, theropod.
Luoyanggia - Dinosaur, oviraptorid.
Lurdusaurus - Dinosaur, ornithopod.
Lusitanosaurus - Dinosaur, thyreophoran (ankylosaur?).
Lusonectes - Marine reptile, plesiosaur.
Lusotitan - Dinosaur, sauropod.
Lycaenodon - Gorgonopsid.
Lycaenops - Therapsid, gorgonopsid.
Lycideops - Therapsid.
Lycoptera - Fish.
Lycorhinus - Dinosaur, heterodontosaurid.
Lycosuchus - Therapsid, therocephalian.
Lystrosaurus - Therapsid, dicynodont.
Lythronax - Dinosaur, tyrannosaur.

M

Machaeroides - Mammal, creodont.
Machairodus - Mammal, big cat.
Macrauchenia - Mammal, litoptern.
Macrocnemus - Archosaur, protorosaur.
Macroleter - Parareptile, procolophonid.
Macroplata - Marine reptile, pliosaur.
Macropoma - Fish.
Macrurosaurus - Dinosaur, sauropod.
Madtsoia - Snake.
Magericyon - Mammal, amphicyonid.
Magnirostris - Dinosaur, ceratopsian.
Magnapaulia - Dinosaur, hadrosaur.
Magnosaurus - Dinosaur, theropod.
Magyarosaurus - Dinosaur, sauropod (titanosaur).
Mahajangasuchus - Crocodile.
Mahakala - Dinosaur, dromaeosaurid.
Maiacetus - Whale, archaeocetid.
Maiasaura - Dinosaur, hadrosaur.
Majungasaurus - Dinosaur, abelisaur.
Makaracetus - Whale, protocetid.
Malarguesaurus - Dinosaur, titanosaur.
Malasaurus - Therapsid.
Malawisaurus - Dinosaur, sauropod (titanosaur).
Maleevus - Dinosaur, ankylosaur.
Malerisaurus - Protosaur.
Mamenchisaurus - Dinosaur, sauropod.
Mammacyon - Mammal, amphicyonid.
Mammalodon - Mammal, whale.
Mammut - Mammal, elephant.
Mammuthus africanavus - Mammal, mammoth.
Mammuthus columbi (Columbian mammoth) - Mammal, mammoth.
Mammuthus exilis (Pygmy mammoth) - Mammal, mammoth.
Mammuthus meridionalis - Mammal, mammoth.
Mammuthus primigenius (Woolly mammoth) - Mammal, mammoth.
Mammuthus subplanifrons - Mammal, mammoth.
Mammuthus trogontherii (Steppe mammoth) - Mammal, mammoth.
Mandageria - Fish.
Manidens - Dinosaur, heterodontosaur.
Mantellisaurus - Dinosaur, ornithopod.
Maotherium - Mammal.
Mapusaurus - Dinosaur, carcharodontosaur.
Marasuchus - Dinosauriform.
Maresaurus - Marine reptile, pliosaur.
Mariliasuchus - Crocodylomorph, notosuchian.
Marisaurus - Dinosaur, titanosaur.
Marrella - Cambrian lifeform.
Marshosaurus - Dinosaur, theropod.
Martharaptor - Dinosaur, therizinosaur?
Masracetus - Whale, archaeocetid.
Massospondylus - Dinosaur, sauropodomorph.
Mastodonsaurus - Temnospondyl.
Masiakasaurus - Dinosaur, abelisaur.
Massaliasuchus - Crocodile.
Materpiscis - Fish, placoderm.
Mauisaurus - Marine reptile, elamosaurid plesiosaur.
Mawsonia - Fish, coelacanth.
Maxakalisaurus - Dinosaur, sauropod.
Medusaceratops - Dinosaur, ceratopsian.
Megacerops - Mammal, brontothere.
Megaladapis - Mammal, lemur.
Megalampris - Fish.
Megalancosaurus - Drepanosaur.
Megaleptictis - Mammal, leptictid.
Megalictis - Mammal, mustelid.
Megaloceros (Irish Elk) - Mammal, giant deer.
Megalodon - Fish, shark.
Megalograptus - Eurypterid.
Megalonyx - Mammal, ground sloth.
Megaloplax - Fish, placoderm.
Megalosaurus - Dinosaur, megalosaur.
Megamastax - Fish, sacopterygiian.
Meganeura - Griffin fly.
Meganeuropsis - Griffin fly.
Megantereon - Mammal, big cat.
Megapaloelodus - Bird.
Megapiranha - Fish, giant piranha.
Megarachne - Eurypterid (sea scorpion).
Megaraptor - Dinosaur, allosaur.
Megatherium - Mammal, ground sloth.
Megazostrodon - Mammaliaform.
Megistotherium - Mammal, creodont.
Meherrinia - Dolphin.
Meiolania - Turtle (terrestrial).
Melanorosaurus - Dinosaur, sauropodomorph.
Melanosteus - Fish, placoderm.
Menarana - Snake, madtsoiid.
Mendozasaurus - Dinosaur, titanosaur.
Mene - Fish.
Merychippus - Mammal, horse.
Mesadactylus - Pterosaur, anurognathid.
Mesembriornis - Bird, phorusrhacid.
Mesenosaurus - Pelycosaur.
Mesohippus - Mammal, horse.
Mesoleptos - Mosasaur.
Mesonyx - Mammal, mesonychid.
Mesophryne - Frog.
Mesopropithecus - Mammal, primate, sloth lemur.
Mesosaurus - Anapsid.
Mesosuchus - Rhynchosaur.
Metoposaurus - Temnospondyl.
Metriacanthosaurus - Dinosaur, theropod.
Metridiochoerus - Mammal, warthog.
Metriorhynchus - Crocodile (marine).
Meyerasaurus - Marine reptile, pliosaur.
Miacis - Mammal.
Miadanasuchus - Crocodile.
Microbrachis Amphibian, lepospondyl.
Microceratus - Dinosaur, ceratopsian.
Microcleidus - Marine reptile, plesiosaur.
Microcoelus - Dinosaur, titanosaur.
Microgomphodon - Therapsid.
Micropachycephalosaurus - Dinosaur, ceratopsian.
Microposaurus - Temnospondyl, stereospondyl.
Microraptor - Dinosaur, dromaeosaurid.
Microurania - Therapsid, biarmosuchian.
Milleretta - Anapsid.
Minmi - Dinosaur, basal ankylosaur.
Minotaurasaurus - Dinosaur, ankylosaur.
Miodentosaurus - Thalattosaur.
Miracinonyx - Mammal, big cat (also called the 'American Cheetah').
Miragaia - Dinosaur, stegosaur.
Mitredon - Therapsid.
Mixocetus - Whale, mysticetid.
Mixosaurus - Marine reptile, ichthyosaur.
Moanasaurus - Marine reptile, mosasaur.
Mochlodon - Dinosaur, igunanodont.
Moeritherium - Mammal, primitive elephant.
Moganopterus - Pterosauria, boreopterid.
Mojoceratops - Dinosaur, ceratopsian.
Mollesaurus - Marine reptile, ichthyosaurus.
Mongolarachne - Spider.
Mongolepis - Fish, shark.
Monjurosuchus - Reptile, choristoderan.
Monkonosaurus - Dinosaur, stegosaur.
Monoclonius - Dinosaur, ceratopsian.
Monolophosaurus - Dinosaur, theropod.
Mononykus - Dinosaur, alvarezsaur.
Montanazhdarcho - Pterosaur, azdarchid.
Montanoceratops - Dinosaur, ceratopsian.
Morawanocetus - Whale.
Morenosaurus - Marine reptile, plesiosaur.
Moropus - Mammal, chalicothere.
Morotopithecus - Mammal, primate.
Morrinhosuchus - Notosuchian.
Mosasaurus - Marine reptile, mosasaur.
Moschops - Therapsid.
Mourasuchus - Crocodile.
Moythomasia - Fish.
Muraenosaurus - Marine reptile, plesiosaur.
Mussaurus - Dinosaur, sauropodomorph.
Muttaburrasaurus - Dinosaur, iguanodont.
Muyelensaurus - Dinosaur, titanosaur.
Muzquizopteryx - Pterosaur, pteranodont.
Mycterosaurus - Pelycosaur.
Myllokunmingia - Primitive fish.
Mylodon - Mammal, ground sloth.
Mymoorapelta - Dinosaur, nodosaur.
Mystriosuchus - Phytosaur.
Mythunga - Pterosaur, pterodactyloid.

N

Nalacetus - Whale, pakicetid.
Nanchangosaurus - Marine reptile.
Nannopterygius - Ichthyosaur, ophthalmosaurid.
Nanosaurus - Dinosaur, ornithopod.
Nanotyrannus - Dinosaur, tyrannosaur.
Nanshiungosaurus - Dinosaur, therizinosaur.
Nanuqsaurus - Dinosaur, tyrannosaur.
Narambuenatitan - Dinosaur, sauropod (titanosaur).
Naraoia - Trilobite.
Nasutoceratops - Dinosaur, ceratopsian.
Natchitochia - Whale, protocetid.
Navajodactylus - Pterosaur, azhdarchid.
Nebulasaurus - Dinosaur, sauropod.
Necrolestes - Mammal.
Nedoceratops - Dinosaur, ceratopsian.
Neimongosaurus - Dinosaur, therizinosaur.
Nemegtosaurus - Dinosaur, sauropod (titanosaur).
Nemicolopterus - Pterosaur, dsungaripterid.
Neohipparion - Mammal, horse.
Neopteroplax -.
Neosodon - Dinosaur, titanosaur?.
Neovenator - Dinosaur, carcharodontosaur.
Nesodactylus - Pterosaur, rhamphorhynchoid.
Neuquenraptor - Dinosaur, dromaeosaur.
Neuquensaurus - Dinosaur, sauropod (titanosaur).
Niaftasuchus - Therapsid, biarmosuchian.
Nicrosaurus - Phytosaur.
Nigerpeton - Amphibian, temnospondyl.
Nigersaurus - Dinosaur, sauropod.
Nimravus - Mammal, nimravid/false sabre-toothed cat.
Ningchengopterus - Pterosaur, pterodactyloid.
Ningyuansaurus - Dinosaur, oviraptosaur.
Nipponosaurus - Dinosaur, hadrosaur.
Noasaurus - Dinosaur, noasaurid.
Nodocephalosaurus - Dinosaur, ankylosaur.
Nodosaurus - Dinosaur, nodosaur.
Nomingia - Dinosaur, oviraptosaur.
Nopcsaspondylus - Dinosaur, sauropod.
Noripterus - Pterosaur, dsungaripterid.
Normannognathus - Pterosaur, dsungaripteroid.
Notharctus - Mammal, primate.
Nothosaurus - marine reptile, nothosaur.
Nothronychus - Dinosaur, therizinosaur.
Nothrotheriops - Mammal, ground sloth.
Notoemys - Turtle.
Notoetayoa - Mammal, xenungulate.
Nqwebasaurus - Dinosaur, ornithomimosaur?.
Nuralagus - Mammal, large rabbit.
Nurhachius - Pterosaur, istiodactylid.
Nuthetes - Dinosaur, dromaeosaur.
Nyasasaurus - Dinosauriform.
Nycteroleter - Anapsid, procolomorph.
Nyctiphruretus - Anapsid, procolomorph.
Nyctosaurus - Pterosaur, pteranodont.

O

Obamadon - Lizard.
Obruchevichthys - Amphibian, temnospondyl.
Odontochelys - Reptile, turtle.
Oedaleops - Pelycosaur.
Ohmdenosaurus - Dinosaur, sauropod.
Ojoceratops - Dinosaur, ceratopsian.
Ojoraptorsaurus - Dinosaur, oviraptosaur.
Oligokyphus - Therapsid, cynodont.
Oligolactoria - Fish.
Olorotitan - Dinosaur, hadrosaur (lambeosaur).
Omeisaurus - Dinosaur, sauropod.
Omoiosicista - Mammal, rodent.
Omphalosaurus - Ichthyosaur.
Onchopristis - Fish, large sawfish.
Oncorhynchus rastrosus (Sabre-toothed salmon) - Fish, salmon.
Onychonycteris - Bat.
Oohkotokia - Dinosaur, ankylosaur.
Opabinia - Cambrian lifeform.
Ophthalmosaurus - Marine reptile, ichthyosaur.
Ophiacodon - Pelycosaur.
Ophiderpeton - Amphibian, lepospondyl.
Opisthocoelicaudia - Dinosaur, sauropod (titanosaur).
Oreopithecus - Mammal, primate.
Orkoraptor Dinosaur, allosaur.
Ornimegalonyx - Bird.
Ornithocheirus - Pterosaur, ornithocherid.
Ornitholestes - Dinosaur.
Ornithomimus - Dinosaur, ornithomimosaur.
Ornithoprion - Fish, shark.
Ornithopsis - Dinosaur, sauropod (titanosauriform).
Ornithostoma Pterosaur, pteranodontid
Ornithosuchus - Archosaur.
Orodromeus - Dinosaur, ornithopod.
Orohippus - Mammal, horse.
Oromycter - Pelycosaur, caseid.
Orovenator - Neodiapsid.
Orthacanthus - Fish, shark (xenacanthid).
Orthogoniosaurus - Dinosaur, theropod.
Orycterocetus - Mammal, whale (predatory).
Oryctodromeus - Dinosaur, hypsilophodont.
Osmakasaurus - Dinosaur, ornithopod.
Ostafrikasaurus - Dinosaur, spinosaurid.
Osteolepis - Fish.
Othnielia - Dinosaur, Neornithischiam.
Othnielosaurus - Dinosaur, Neornithischian.
Otodus - Fish, shark.
Otsheria - Synapsid, anomodont.
Oudenodon - Therapsid, dicynodont.
Ouranopithecus - Mammal, primate.
Ouranosaurus - Dinosaur, ornithopod (basal hadrosaur).
Oviraptor - Dinosaur, oviraptorid.
Owenetta - Parareptile.
Oxalaia - Dinosaur, spinosaur.
Oxyosteus - Placoderm fish.
Ozraptor - Dinosaur.

P

Pachycephalosaurus - Dinosaur, pachycephalosaur.
Pachydectes - Therapsid, biarmosuchian.
Pachypleurosaurus - Pachypleurosaur.
Pachyrhinosaurus - Dinosaur, ceratopsian.
Pakicetus - Mammal, whale ancestor.
Palaeobalaena - Whale.
Palaeobatrachus - Frog.
Palaeocarcharodon - Shark.
Palaeoniscum - Fish.
Paleorhinus - Phytosaur.
Paludititan - Dinosaur, titanosaur.
Palvennia - Ichthyosaur, ophthalmosaurid.
Pakisaurus - Dinosaur, titanosaur.
Palaelodus - Bird.
Palaeocastor - Mammal, beaver.
Palaeochiropteryx - Mammal, bat.
Palaeoctopus - Cephalopod, octopus.
Palaeohatteria - Pelycosaur.
Palaeolagus - Mammal.
Palaeomastodon - Mammal, elephant.
Palaeoniscum - Fish.
Palaeophonus - Scorpion.
Palaeopropithecus - Mammal, primate, sloth lemur.
Palaeosaniwa - Lizard.
Palaeoscincus - Dinosaur, ankylosaur?
Palaeospondylus - Vertebrate, fish?
Palaeotherium - Mammal.
Paleoparadoxia - Mammal, desmostylid.
Paleopsilopterus - Bird, phorusrhacid.
Palmulasaurus - Marine reptile, plesiosaur.
Palorchestes - Mammal, marsupial.
Pambdelurion - Cambrian lifeform.
Panamericansaurus - Dinosaur, titanosaur.
Panderichthys - Fish.
Pannoniasaurus - Mosasaur.
Panphagia - Dinosaur, sauropodomorph.
Panthera leo atrox (American lion) - Mammal, lion.
Panthera leo fossilis - Mammal, lion.
Panthera leo spelaea (Cave lion) - Mammal, lion.
Pantydraco - Dinosaur, sauropodomorph.
Pappocetus - Whale.
Paraceratherium - Mammal.
Paradaphoenus - Mammal, amphicyonid.
Paraentelodon - Mammal, entelodont.
Parahippus - Mammal, horse.
Paralititan - Dinosaur, sauropod (titanosaur).
Paramylodon - Mammal, ground sloth.
Paranthodon - Dinosaur, stegosaur.
Paraphysornis - Bird, phorusrhacid.
Paraplacodus - Marine reptile, placodont.
Parapuzosia - Giant ammonite.
Pararhabdodon - Dinosaur, hadrosaur.
Parasaurolophus - Dinosaur, hadrosaur.
Parastylonurus - Eurypterid.
Parasuchus - Phytosaur.
Pareiasaurus - Pareiasaur.
Parexus - Fish, acanthodiian.
Parksosaurus - Dinosaur, ornithopod.
Parvinatator - Marine reptile, ichthyosaur.
Patagonykus - Dinosaur, alvarezsaur.
Patagopteryx - Bird.
Patagornis - Bird, phorusrhacid.
Patagosaurus - Dinosaur, sauropod.
Patranomodon - Therapsid, anomodont.
Pawpawsaurus - Dinosaur, nodosaur.
Pederpes - Amphibian.
Pegomastax - Dinosaur, heterodontosaur.
Pelecanimimus - Dinosaur, ornithomimosaur.
Peloneustes - Marine reptile, pliosaur.
Pelorocephalus - Temnospondyl.
Peloroplites - Dinosaur, nodosaur (polacanthine).
Pelorosaurus - Dinosaur, sauropod.
Pelorovis - Mammal, bovid.
Peltephilus - Mammal, armadillo.
Peltobatrachus - Amphibian, temnospondyl.
Pentaceratops - Dinosaur, ceratopsian.
Pepesuchus - Crocodylomorph.
Percrocuta - Mammal, hyena.
Perleidus - Fish.
Peteinosaurus - Pterosaur, dimorphodont.
Petrolacosaurus - Reptile, diapsid.
Peytoia - Anomolocarid arthropod.
Pharyngolepis - Jawless fish.
Phascolonus - Wombat.
Philovenator - Dinosaur, troodont.
Phiomia - Elephant.
Phoberomys - Mammal, giant rodent.
Phoeniconotius - Bird.
Pholiderpeton - Reptilomorph.
Pholidogaster - Amphibian, temnospondyl.
Phonerpeton - Amphibian, temnospondyl.
Phonodus - Procolophonid.
Phorusrhacos - Bird, Phorusrhacid.
Phosphatodraco - Pterosaur, azhdarchid.
Phthinosuchus - Therapsid.
Phuwiangosaurus - Dinosaur, sauropod (titanosaur).
Physornis - Bird, phorusrhacid.
Piatnitzkysaurus - Dinosaur, theropod.
Piceoerpeton - Chordata, scapherpetontid.
Pierolapithecus - Mammal, primate.
Pikaia - Cambrian lifeform, cephalochordate?
Pinacosaurus - Dinosaur, ankylosaurid.
Pisanosaurus - Dinosaur, ornithischian.
Pistosaurus - Marine reptile, pistosaurid.
Pitekunsaurus - Dinosaur, titanosaur.
Pittsfordipterus - Eurypterid.
Piveteausaurus - Dinosaur, theropod.
Placerias - Therapsid, Dicynodont.
Placochelys - Marine reptile, Placodont.
Placodus - Marine reptile, placodont.
Planicoxa - Dinosaur. iguanodont.
Plataleorhynchus - Pterosaur, ctenochasmatid.
Platecarpus - Marine reptile, mosasaur.
Plateosaurus - Dinosaur, sauropodomorph.
Platybelodon - Elephant, gomphothere.
Platyceratops - Dinosaur, ceratopsian.
Platygonus - Mammal, tayassuid.
Platyhystrix - Amphibian, temnospondyl.
Platyoposaurus - Amphibian, temnospondyl.
Platypterygius - Marine reptile, ichthyosaur.
Platysomus - Fish.
Plesiadapis - Mammal, primate ancestor?
Plesioplatecarpus - Mosasaur.
Plesiopleurodon - Plesiosaur, polycotylid.
Plesiosaurus - Marine reptile, plesiosaur.
Plesiosuchus - Crocodile, thalattosuchian.
Plesiotylosaurus - Marine reptile, mosasaur.
Pliobatrachus - Frog.
Pliocyon - Mammal, amphicyonid.
Pliohippus - Mammal, Horse.
Pliopithecus - Mammal, primate.
Plioplatecarpus - Marine reptile, mosasaur.
Pliosaurus - Marine reptile, pliosaur.
Plotosaurus - Marine reptile, mosasaur.
Pneumatoraptor - Dinosaur, maniraptoran.
Podokesaurus - Dinosaur, coelophysid.
Poekilopleuron - Dinosaur, theropod.
Pogonodon - Mammal, nimravid.
Pohlsepia - Cephalopod, octopod.
Polacanthus - Dinosaur, ankylosaur.
Polonosuchus - Rauisuchian.
Polycotylus - Marine reptile, plesiosaur.
Polymerolepis - Fish, shark.
Polyptychodon - Pliosaur.
Polysternon - Turtle, bothremydid.
Pontosaurus - Marine reptile.
Poposaurus - Rauisuchian, poposaurid.
Postosuchus - Rauisuchian.
Potangaspis - Fish, placoderm.
Prejanopterus - Pterodactyloid.
Prenocephale - Dinosaur, pachycephalosaur.
Prenoceratops - Dinosaur, ceratopsian.
Preondactylus - Pterosaur, rhamphorhynchid.
Presbytherium - Pantodont.
Prestosuchus - Rauisuchian.
Prionosuchus - Amphibian, temnospondyl.
Priscakoala - Mammal, diprotodont, koala.
Pristerodon - Dicynodont.
Pristichampsus - Crocodile.
Proaigialosaurus - Marine reptile.
Probactrosaurus - Dinosaur, iguanodont.
Proburnetia - Therapsid, biarmosuchian.
Procaimanoidea - Crocodile.
Procariama - Bird, phorusrhacid.
Proceratosaurus - Dinosaur, tyrannosaur.
Procolophon - Parareptile.
Procompsognathus - Dinosaur, coelophysid.
Proconsul - Mammal, primate.
Procoptodon - Mammal, kangaroo.
Procynosuchus - Therapsid.
Proganochelys - Turtle.
Prognathodon - Marine reptile, placodont.
Prolacerta - Archosauromorpha, prolacertid.
Propliopithecus - Mammal, primate.
Propyrotherium - Mammal, pyrothere.
Proraphidia - Insect, snake fly.
Prorubidgea - Gorgonopsid.
Prosalirus - Frog.
Prosansanosmilus - Mammal, barbourofelid.
Prosaurolophus - Dinosaur, hadrosaur.
Prosictodon - Dicynodont.
Prosqualodon - Mammal, whale.
Protemnocyon - Mammal, amphicyonid.
Protemnodon - Kangaroo.
Protenodontosaurus - Marine reptile, placodont.
Proterochersis - Turtle, pleurodiran.
Proteroctopus - Cephalopod, octopod.
Proterogyrinus - Reptilomorph.
Proterosuchus - Archosaur.
Proticia - Mammal.
Protictitherium - Mammal, hyaenid.
Protobrama - Fish.
Protocaptorhinus - Reptile, captorhinid.
Protoceratops - Dinosaur, ceratopsian.
Protocetus - Mammal, whale.
Protognathosaurus - Dinosaur, sauropod.
Protome - Phytosaur.
Protorosaurus - Archosauromorph.
Protostega - Turtle.
Protosuchus - Crocodile.
Protypotherium - Mammal.
Provelosaurus - Pareiasaur.
Psephoderma - Marine reptile, placodont.
Pseudamphicyon - Mammal, amphicyonid.
Pseudarctos - Mammal, amphicyonid.
Pseudocyon - Mammal, amphicyonid.
Pseudocyonopsis - Mammal, amphicyonid.
Psilopterus - Bird, phorusrhacid.
Psittacopes - Bird, parrot.
Psittacosaurus - Dinosaur, primitive ceratopsian.
Pteranodon - Pterosaur, pteranodontid.
Pteraspis - Fish.
Pterodactylus - Pterosaur, pterodactylid.
Pterodaustro - Pterosaur, ctenochasmatid.
Pterodon - Mammal, primate.
Pterorhynchus - pterosaur, rhamphorhynchid.
Pteroplax - Reptilomorph.
Pterygotus - Eurypterid (sea scorpion).
Ptychodus - Fish, shark.
Puentemys - Turtle, pleurodiran.
Puertasaurus - Dinosaur, titanosaur.
Puijila - Mammal, pinniped.
Pulmonoscorpius - Arthropod, scorpion.
Pumiliopareia - Pareiasaur.
Puntanipterus - Pterosaur, dsungaripterid?
Purbeckodon - Cynodont.
Purussaurus - Crocodile.
Pycnodus - Fish.
Pyroraptor - Dinosaur, dromaeosaur.
Pyrotherium - Mammal, pyrothere.

Q

Qaisracetus - Mammal, whale.
Qantas - Amphibian, temnospondyl.
Qantassaurus - Dinosaur, ornithopod.
Qianichthyosaurus - Marine reptile, ichthyosaur
Qianosuchus - Rauisuchian, poposaurid.
Qianxisaurus - Marine reptile, eosauropterygian.
Qiaowanlong - Dinosaur, sauropod.
Qinglongopterus - Pterosaur, rhamphorhynchid.
Qingxiusaurus - Dinosaur, titanosaur.
Qiupalong - Dinosaur, ornithomimosaur.
Quaesitosaurus - Dinosaur, titanosaur.
Quercylurus - Mammal, nimravid.
Quetecsaurus - Dinosaur, titanosaur.
Quetzalcoatlus Pterosaur, azhdarchid.
Quinkana - Crocodile.

R

Rahiolisaurus - Dinosaur, abelisaurid.
Rahonavis - Dinosaur, dromaeosaur.
Rajasaurus - Dinosaur, abelisaur.
Rapator - Dinosaur.
Rapetosaurus - Dinosaur, sauropod (titanosaur).
Raptorex - Dinosaur, tyrannosaur.
Raranimus - Dinosaur, Therapsid.
Ratchasimasaurus - Dinosaur, iguanodont.
Rayososaurus - Dinosaur, sauropod.
Rebbachisaurus - Dinosaur.
Redondasaurus - Phytosaur.
Redondavenator - Crocodylomorph, sphenosuchid.
Regaliceratops - Dinosaur, ceratopsian.
Reginaselache - Fish, xenacanthid shark.
Regnosaurus - Dinosaur, stegosaur.
Reiszorhinus - Captorhinid.
Remingtonocetus - Whale, arhcaeocetid.
Repenomamus - Mammal.
Revueltosaurus - Pseudosuchian.
Rhabdodon - Dinosaur, iguanodont?.
Rhamphinion - pterosaur.
Rhamphocephalus - Pterosaur.
Rhamphodopsis - Fish, placoderm.
Rhamphorhynchus - Pterosaur, rhamphorhynchid.
Rhamphosuchus - Crocodile.
Rhinesuchus - Amphibian, temnospondyl.
Rhinodipterus - Fish.
Rhiodenticulatus - Captorhinid.
Rhipaeosaurus - Parareptile, procolophonomorph.
Rhizodus - Fish.
Rhizosmilodon - Machairodont (sabre-toothed cat).
Rhoetosaurus - Dinosaur, sauropod.
Rhomaleosaurus - Marine reptile, pliosaur.
Rhopalodon - Therapsid.
Rhynchippus - Mammal, notoungulate.
Richardoestesia - Dinosaur, theropod.
Riebeeckosaurus - Dinocephalian.
Rinchenia - Dinosaur, oviraptorid.
Rinconsaurus - Dinosaur, sauropod.
Riojasaurus - Dinosaur, sauropodomorph.
Rocasaurus - Dinosaur, sauropod.
Rodhocetus - Mammal, whale.
Rolfosteus - Fish, placoderm.
Romeria - Captorhinid.
Rubeosaurus - Dinosaur, ceratopsian.
Rubidgea - Gorgonopsid.
Ruehleia - Dinosaur, prosauropod.
Rugocaudia - Dinosaur, sauropod.
Rugops - Dinosaur, abelisaur.
Rukwatitan - Dinosaur, sauropod (titanosaur).
Russellosaurus - Marine reptile, mosasaur.
Rutiodon - Phytosaur.
Ruyangosaurus - Dinosaur, sauropod.

S

Sacabambaspis - Fish.
Sacisaurus - Dinosauriform.
Saghacetus - Whale.
Sahaliyania - Dinosaur, hadrosaur.
Saharastega - Amphibian, temnospondyl.
Saichania - Dinosaur, ankylosaur.
Saltasaurus - Dinosaur, sauropod (titanosaur).
Saltoposuchus - Archosaur, crocodylomorph.
Saltopus - Dinosauriform.
Samburupithecus - Mammal, primate.
Samrukia - Pterosaur.
Sanajeh - Snake, madtsoiid.
Sanctacaris - Arthropod (Cambrian).
Saniwa - Lizard.
Sanjuansaurus - Dinosaur.
Sansanosmilus - Mammal, barbourofelid.
Santanadactylus - Pterosaur, pterodactylid.
Santanaraptor - Dinosaur, theropod.
Sapeornis - Bird.
Sarahsaurus - Dinosaur.
Sarcocyon - Mammal, amphicyonid.
Sarcolestes - Dinosaur, ankylosaur.
Sarcoprion - fish, shark.
Sarcosaurus - Dinosaur, theropod.
Sarcosuchus - Crocodile.
Sarkastodon - Mammal, creodont.
Saturnalia - Dinosaur, sauropodomorph.
Saurichthys - Fish.
Saurodon - Fish, ichthyodectid.
Saurolophus - Dinosaur, hadrosaur.
Sauroniops - Dinosaur, carcharodontosaurid.
Sauropareion - Procolophonid.
Sauropelta - Dinosaur, nodosaur.
Saurophaganax - Dinosaur, allosaur.
Sauropleura - Amphibian.
Sauroposeidon - Dinosaur, sauropod.
Saurornithoides, Dinosaur, troodontid.
Saurornitholestes - Dinosaur, dromaeosaur.
Saurosphargis - Marine reptile, placodont.
Saurosuchus - Rausuchian
Scaloposaurus - Therapsid.
Scansoriopteryx - Dinosaur, scansoriopterygid.
Scapanorhynchus - Fish, shark.
Scaphognathus - Pterosaur, rhamphorhynchid.
Scelidosaurus - Dinosaur, thyreophoran.
Schizooura - Bird.
Scipionyx - Dinosaur, compsognathid.
Sciurumimus - Dinosaur, theropod.
Sclerocephalus - Amphibian, temnospondyl.
Sclerorhynchus - Fish, sawfish.
Sclerosaurus - Pareiasaur.
Scolosaurus - Dinosaur. ankylosaur.
Scutellosaurus - Dinosaur.
Scutosaurus - Pareiasaur.
Scylacognathus - Gorgonopsid.
Scylacops - Gorgonopsid.
Scylacorhinus - Therapsid.
Scylacosaurus - Therapsid.
Scymnosaurus - Therapsid.
Sebecus - Crocodylomorph, notosuchian.
Secernosaurus - Dinosaur, hadrosaur.
Secodontosaurus - Pelycosaur.
Segisaurus - Dinosaur, coelophysid.
Segnosaurus - Dinosaur, therizinosaurid.
Seitaad - Dinosaur.
Selmasaurus - Marine reptile, mosasaur.
Seminobatrachus - Salamander.
Sericipterus - Pterosaur, rhamphorhynchid.
Seymouria - Reptiliomorph.
Shamosaurus - Dinosaur, ankylosaur.
Shanag - Dinosaur, dromaeosaur.
Shantungosaurus - Dinosaur, hadrosaur.
Shanxia - Dinosaur, ankylosaur.
Shanyangosaurus - Dinosaur, coelurosaurian.
Shaochilong - Dinosaur, carcharodontosaurid.
Shastasaurus - Marine Reptile, ichthyosaur.
Shenzhoupterus - Pterosaur, azdarchid.
Shenzhousaurus - Dinosaur, ornithomimosaur.
Shidaisaurus - Dinosaur, theropod.
Shihtienfenia - Pareiasaur.
Shonisaurus - Marine reptile, ichthyosaurus.
Shunosaurus - Dinosaur, sauropod.
Shuvosaurus - Rauisuchian.
Shuvuuia - Dinosaur, alvarezsaur.
Siamodon - Dinosaur, iguanodont.
Siamosaurus - Dinosaur, spinosaurid.
Siamotyrannus - Dinosaur, theropod.
Siats - Dinosaur, theropod, maniraptoran.
Sidneyia - Arthropod, limulavid.
Silesaurus -  Dinosauromorph.
Sillosuchus - Rauisuchian, poposaurid.
Silvanerpeton - Reptilomorph, embolomerid.
Silvisaurus - Dinosaur, nodosaur.
Similicaudipteryx - Caudipterid.
Simolestes - Marine reptile, pliosaur.
Sinerpeton - Amphibian, salamander.
Sinobaatar - Mammal.
Sinocalliopteryx - Dinosaur, compsognathid.
Sinoceratops -Dinosaur, ceratopsian.
Sinocoelurus - Dinosaur, theropod.
Sinoconodon - Therapsid, cynodont.
Sinodelphys - Mammal, metatherian.
Sinokannemeyeria - Therapsid, dicynodont.
Sinopa - Mammal, creodont.
Sinophoneus - Therapsid, dinocephalian.
Sinopliosaurus - Pliosaur.
Sinopterus - Pterosaur, tapejarid.
Sinornithoides - Dinosaur, troodontid.
Sinornithomimus - Dinosaur, ornithomimosaur.
Sinornithosaurus - Dinosaur, dromaeosaurid.
Sinosauropteryx - Dinosaur, compsognathid.
Sinosaurus - Dinosaur, theropod.
Sinotherium - Mammal, rhino.
Sinotyrannus - Dinosaur, theropod.
Sinovenator - Dinosaur, troodont.
Sinraptor - Dinosaur, allosaur.
Sivapithecus - Mammal, primate.
Sivatherium - Mammal, giraffe.
Skorpiovenator - Dinosaur, abelisaur.
Sludica - Therapsid, procynosuchid.
Smilodectes - Mammal, primate.
Smilodon - Mammal, big cat (also known as the sabre toothed cat/Tiger).
Smilosuchus - Phytosaur.
Smok - Archosaur.
Solenodonsaurus - Temnospondylid (reptilomorph).
Sonidosaurus - Dinosaur, sauropod (titanosaur).
Sonorasaurus - Dinosaur, sauropod.
Sordes - Pterosaur, rhamphorhynchid.
Spathobatis - Fish, ray.
Sphenacanthus - Shark.
Sphenacodon - Pelycosaur.
Sphenocephalus - Fish.
Sphenosaurus - Procolophonid.
Spinophorosaurus - Dinosaur, sauropod.
Spinops - Dinosaur, ceratopsian.
Spinosaurus - Dinosaur, spinosaur.
Spinostropheus - Dinosaur, theropod.
Spitrasaurus - Plesiosaur.
Squalicorax - Fish, shark.
Squalodon - Mammal, cetacean.
Stagonolepis - Aetosaur.
Stag-moose (Cervalces) - Mammal, deer.
Staurikosaurus - Dinosaur, theropod.
Stegoceras - Dinosaur, pachycephalosaur.
Stegomastodon - Mammal, elephant.
Stegosaurus - Dinosaur, stegosaur.
Steller's sea cow (Hydrodamalis) - Mammal, sirenian.
Stenaulorhynchus - Rhynchosaur.
Steneosaurus - Archosauromorph, teleosaurid.
Stenocybus - Therapsid. anteosaur.
Stenopelix - Dinosaur, ceratopsian.
Stenopterygius - Marine reptile, ichthyosaur.
Stereorhachis - Pelycosaur.
Steropodon - Monotreme mammal.
Stethacanthus - Fish, shark.
Sthenurus - Mammal, kangaroo.
Stokesosaurus - Dinosaur, tyrannosaur.
Stomatosuchus - Crocodile.
Stormbergia - Dinosaur, ornithischian.
Stratesaurus - Plesiosaur, rhomaleosaurid.
Streptospondylus - Dinosaur, theropod.
Stromerius - Whale.
Strunius - Fish.
Struthiomimus - Dinosaur, ornithomimosaur.
Struthiosaurus - Dinosaur, nodosaur.
Stupendemys - Turtle.
Stygimoloch - Dinosaur, pachycephalosaur.
Styletoctopus - Cephalopod, octopus.
Styracocephalus - Therapsid.
Styracosaurus - Dinosaur, ceratopsian.
Styxosaurus - Marine reptile, elasmosaurid plesiosaur.
Suchomimus - Dinosaur, spinosaur.
Sulcusuchus - Marine reptile, plesiosaur.
Sulaimanisaurus - Dinosaur, titanosaur.
Suminia - Therapsid, anomodont.
Supersaurus - Dinosaur, sauropod.
Supradapedon - Rhynchosaur.
Suuwassea - Dinosaur, sauropod.
Sveltonectes - Marine reptile, ichthyosaur.
Sycosaurus - Gorgonopsid.
Synostocephalus - Dicynodont.
Syodon - Therapsid, anteosaurid.
Syrtosmilus - Mammal, barbourofelid.
Szechuanosaurus - Dinosaur. theropod.

T

Tadzhikosuchus - Crocodile.
Takracetus - Mammal, whale.
Talarurus - Dinosaur, ankylosaurid.
Talos - Dinosaur, troodont.
Tambachia - Amphibian, temnospondyl.
Tambatitanis - Dinosaur, sauropod.
Tamisiocaris - Anomalocaridid.
Tangvayosaurus - Dinosaur, sauropod.
Tanius - Dinosaur, hadrosaur.
Taniwhasaurus - Marine reptile, mosasaur.
Tanycolagreus - Dinosaur, tyrannosaur.
Tanystropheus - Reptile, archosauromorph.
Tanytrachelos - Protosaur, tanystropheid.
Taognathus - Therapsid, dicynodont.
Tapejara - Pterosaur, tapejarid.
Tapinocaninus - Therapsid, dinocephalian.
Tapinocephalus - Therapsid, dinocephalian.
Tapuiasaurus - Dinosaur, titanosaur.
Tarascosaurus - Dinosaur, abelisaur?.
Tarbosaurus - Dinosaur, tyrannosaur.
Tarchia - Dinosaur, ankylosaur.
Tarjadia - Archosauriform, doswelliid.
Tastavinsaurus - Dinosaur, sauropod.
Tatankacephalus - Dinosaur, nodosaur.
Tatankaceratops - Dinosaur, ceratopsian.
Tataouinea - Dinosaur, sauropod.
Tatenectes - Marine reptile, plesiosaur.
Tawa - Dinosaur.
Tazoudasaurus - Dinosaur, sauropod.
Technosaurus - Archosauromorph.
Tehuelchesaurus - Dinosaur.
Teilhardina - Mammal, primate.
Teinolophos - Monotreme mammal.
Teleidosaurus - Thalattosuchian (Marine crocodile).
Teleosaurus - Crocodile (marine).
Telmatosaurus - Dinosaur, hadrosaur.
Temnocyon - Mammal, amphicyonid.
Temnodontosaurus - Marine reptile, ichthyosaur.
Tendaguripterus - Pterosaur, dsungaripterid.
Tenontosaurus - Dinosaur, ornithopod.
Teraterpeton - Archosauromorph.
Teratophoneus - Dinosaur, tyrannosaur.
Teratosaurus - Rauisuchian.
Termatosaurus - Phytosaur.
Terminonatator - Marine reptile, elasmosaurid plesiosaur.
Terrestrisuchus - Dinosaur, sauropod.
Tetanopsyrus - Fish, acanthodiian.
Tethysaurus - Marine reptile, mosasaur.
Tethyshadros - Dinosaur, hadrosaur.
Tetraceratops - Synapsid.
Tetracynodon - Therapsid, therocephalian.
Texacephale - Dinosaur, pachycephalosaur.
Texasetes - Dinosaur, nodosaur.
Teyumbaita - Rhynchosaur.
Thadeosaurus - Reptile, eosuchian.
Thalassiodracon - Marine reptile, pliosaur?.
Thalassodromeus - Pterosaur, neoazhdarchid.
Thalassomedon - Marine reptile, elasmosaurid plesiosaur.
Thalattoarchon - Marine reptile, ichthyosaur.
Thecodontosaurus - Dinosaur, sauropodomorph.
Thelodus - Jawless fish.
Theosodon - Mammal, litoptern.
Theriognathus - Therapsid.
Therizinosaurus - Dinosaur, therizinosaur.
Thililua - Marine reptile, plesiosaur.
Thrinaxodon - Therapsid, cynodont.
Thrissops - Fish.
Thylacoleo - Mammal, marsupial (known as the maruspial lion).
Thylacosmilus - Mammal, marsupial.
Tianyulong - Dinosaur, heterodontosaur.
Tianyuraptor - Dinosaur, dromaeosaur.
Tianzhenosaurus - Dinosaur, ankylosaur.
Tiarajudens - Therapsid.
Tichvinskia - Procolophonid.
Tienshanosaurus - Dinosaur, sauropod.
Tiktaalik - Fish, sarcopterygii.
Tirraturhinus - Amphibian, temnospondyl.
Titanichthys - Fish, placoderm.
Titanis - Bird, phorusrhacid.
Titanites - Ammonite.
Titanoboa - Snake.
Titanoceratops - Dinosaur, ceratopsian.
Titanocetus - Whale.
Titanoides - Mammal, pantodont.
Titanophoneus - Therapsid.
Titanosaurus - Dinosaur, titanosaur.
Titanosuchus - Therapsid.
Togocetus - Whale.
Tokosaurus - Parareptile, procolophonid.
Tomarctus - Mammal, canid (borophagine).
Toretocnemus - Marine reptile, ichthyosaur
Tornieria - Dinosaur, sauropod.
Torosaurus - Dinosaur, ceratopsian.
Torvoneustes - Crocodile, thalattosuchian.
Torvosaurus - Dinosaur, theropod.
Toxodon - Mammal.
Traukutitan - Dinosaur, titanosaur.
Tremataspis - Jawless fish.
Trematochampsa - Crocodile.
Trematolestes - Amphibian, temnospondyl.
Trematosaurus - Amphibian, temnospondyl.
Triadobatrachus - Frog.
Triceratops - Dinosaur, ceratopsian.
Tricleidus - Marine reptile, plesiosaur.
Trigodon - Mammal, notoungulate.
Trigonosaurus - Dinosaur, sauropod.
Trilophosaurus - Archosauromorph, trilophosaurid.
Trimucrodon - Dinosaur, ornithischian.
Trinacromerum - Marine reptile, plesiosaur.
Trinisaura - Dinosaur, ornithopod.
Triodus - Fish, sharks (xenacanthid).
Tristychius - Fish, shark.
Tritemnodon - Mammal, hyaenodont.
Trithelodon - Therapsid, cynodont.
Tritylodon - Therapsid, cynodont.
Trochosaurus - Therapsid, therocephalian.
Trochosuchus - Therapsid.
Troodon - Dinosaur, troodontid.
Tropeognathus - Pterosaur, ornithocheirid.
Tropidostoma - Therapsid, dicynodont.
Tsaagan - Dinosaur, dromaeosaur.
Tsagantegia - Dinosaur, ankylosaur.
Tseajaia - Reptilomorph, diadectomorph.
Tsintaosaurus - Dinosaur, hadrosaur.
Tuarangisaurus - Marine reptile, elasmosaurid.
Tubonasus - Fish, placoderm.
Tugulusaurus - Dinosaur, coelurosaur.
Tuojiangosaurus - Dinosaur, stegosaur.
Tupandactylus - Pterosaur, tapejarid.
Tupuxuara - Pterosaur, azhdarchid.
Turanoceratops - Dinosaur, ceratopsian.
Turiasaurus - Dinosaur, sauropod.
Turkanapithecus - Mammal, primate.
Tusoteuthis - Giant squid.
Tylocephale - Dinosaur, pachycephalosaur.
Tylocephalonyx - Mammal, chalicothere.
Tylosaurus - Marine reptile, mosasaur.
Tyrannoneustes - Crocodile, metriorhynchid.
Tyrannosaurus - Dinosaur, Tyrannosaur.
Tyrannotitan - Dinosaur, carcharodontosaur.

U

Uatchitodon - Dinosaur, archosauromorph.
Uberabatitan - Dinosaur, sauropod (titanosaur).
Udanoceratops - Dinosaur, leptoceratopsid.
Ugrunaaluk - Dinosaur, hadrosaur.
Uintascorpio - Scorpion.
Uintatherium - Mammal, uintathere.
Ulemica - Therapsid, anomodont.
Ulemosaurus - Therapsid.
Ultrasaurus - Dinosaur, sauropod.
Unaysaurus - Dinosaur, sauropodomorph.
Unenlagia - Dinosaur, dromaeosaur.
Unescoceratops - Dinosaur, leptoceratopsid.
Unwindia - pterosaur, ctenochasmatid.
Urbacodon - Dinosaur, troodont.
Ursus arctos crowtheri (Atlas bear) - Bear.
Ursus spelaeus (cave bear) - Bear.
Utahceratops - Dinosaur, ceratopsian.
Utahraptor - Dinosaur, dromaeosaur.
Utatsusaurus - Marine reptile, ichthyosaur.
Uteodon - Dinosaur, ornithopod.

V

Vagaceratops - Dinosaur, ceratopsian.
Vahiny - Dinosaur, sauropod (titanosaur).
Valdoraptor - Dinosaur, ornithomimosaur.
Valdosaurus - Dinosaur, ornithopod.
Vallecillosaurus - Marine reptile, mosasaur.
Vampyrictis - Mammal, barbourofelid.
Vampyronassa - Cephalopod, vampyroteuthid.
Vancleavea - Archosauriform.
Varanodon - Pelycosaur.
Varanops - Pelycosaur.
Varanosaurus - Pelycosaur.
Varanus priscus - Giant monitor lizard.
Variraptor - Dinosaur, dromaeosaurid.
Vectidraco - Pterosaur, azdarchoid.
Vectocleidus - Plesiosaur.
Vegavis - Bird, anseriform.
Velafrons - Dinosaur, hadrosaur.
Velociraptor - Dinosaur, dromaeosaurid.
Velocisaurus - Dinosaur, noasaur.
Venenosaurus - Dinosaur, sauropod.
Venjukovia - Synapsid.
Ventastega - Amphibian.
Vetulocystis - Echinoderm.
Victoriaceros - Mammal, rhino.
Vinialesaurus - Marine reptile, plesiosaur.
Vishnucyon - Mammal, amphicyonid.
Vitakridrinda - Dinosaur, abelisaur.
Vivaxosaurus - Therapsid, docynodont.
Viverra leakeyi (Leakey's civet) - Mammal, civet.
Vjushkovia - Archosaur, erythrosuchid.
Voay - Crocodile.
Volgadraco - Pterosaur, azhdarchid.
Volkheimeria - Dinosaur, sauropod.
Vulcanodon - Dinosaur, sauropod.

W

Waipatia - Mammal, Cetacean.
Walgettosuchus - Dinosaur.
Wannanosaurus - Dinosaur, pachycephalosaur.
Wendiceratops - Dinosaur, ceratopsian.
Westlothiana - Reptilomorph.
Westphaliasaurus - Marine reptile, plesiosaur.
Willinakaqe - Dinosaur, hadrosaur.
Willungacetus - Mammal, whale.
Wintonotitan - Dinosaur, sauropod.
Witwatia - Bat.
Wiwaxia - Cambrian lifeform.
Wodnika - Fish, shark.
Wonambi - Snake.
Wood Harrier Circus dossenus - Bird of prey, Harrier.
Woolly rhino (Coelodonta) - Mammal, rhino.
Woolly mammoth (M. primigenius) - Mammal, mammoth.
Woolungasaurus - Marine reptile, elasmosaurid plesiosaur
Wuerhosaurus - Dinosaur, stegosaur.
Wukongopterus - Pterosaur, wukongopterid.
Wulagasaurus - Dinosaur, hadrosaur.
Wulatelong - Dinosaur, oviraptosaur.
Wuttagoonaspis - Fish, placoderm.

X

Xenacanthus - Fish, shark (xenacanthid).
Xenoceratops - Dinosaur, ceratopsian.
Xenohystrix - Mammal, porcupine.
Xenoposeidon - Dinosaur, sauropod.
Xenorophus - Mammal, cetacean.
Xenosmilus - Mammal, big cat.
Xenotarsosaurus - Dinosaur, abelisaur?
Xianglong - Reptile (gliding lizard).
Xiangornis - Bird.
Xianshanosaurus - Dinosaur, titanosaur.
Xiaotingia - Dinosaur, archaeopterygid.
Xilousuchus - Rauisuchian, ctenosauriscid.
Xinpusaurus - Thalattosaur.
Xiongguanlong - Dinosaur, tyrannosaur.
Xiphactinus - Fish.
Xixianykus - Dinosaur, alvarezsaur.
Xixiasaurus - Dinosaur, troodont.
Xuanhanosaurus - Dinosaur, megalosaur.
Xuanhuaceratops - Dinosaur, ceratopsian.
Xuwulong - Dinosaur, hadrosaur.

Y

Yacarerani - Crocodylomorph, notosuchian.
Yaguarasaurus - Marine reptile, mosasaur.
Yamaceratops - Dinosaur, ceratopsian.
Yangchuanosaurus - Dinosaur, allosaur.
Yanoconodon - Mammaliaform.
Yanornis - Bird.
Yaverlandia - Dinosaur, theropod.
Yawunik - Stem arthropod.
Yi - Dinosaur, scansoriopterid.
Yimenosaurus - Dinosaur, sauropodomorph.
Yinlong - Dinosaur, ceratopsian.
Yixianopterus - Pterosaur, ornithocheirid.
Yixianornis - Bird.
Yixianosaurus - Dinosaur, Coelurosaur (maniraptorian).
Ymeria - Amphibian.
Yongjinglong - Dinosaur, titanosaur.
Youngina - Neodiapsid, younginid.
Youngosuchus - Archosaur, erythrosuchid?/rauisuchian?
Ysengrinia - Mammal, amphicyonid.
Yuanmousaurus - Dinosaur, sauropod.
Yueosaurus - Dinosaur, ornithopod.
Yuknessia - Algae.
Yulong - Dinosaur, oviraptosaur.
Yunmenglong - Dinosaur, sauropod.
Yunnanosaurus - Dinosaur, sauropodomorph.
Yurgovuchia - Dinosaur, dromaeosaur.
Yurlunggur - Snake.
Yutyrannus - Dinosaur, tyrannosaur.
Yuzhoupliosaurus - Marine reptile, pliosaur.

Z

Zaglossus hacketti - Mammal, monotreme (giant echidna).
Zalambdalestes - Mammal, eutherian.
Zalmoxes - Dinosaur, ornithopod.
Zanabazar - Dinosaur, troodont.
Zapalasaurus - Dinosaur, sauropod.
Zarafasaura - Marine reptile, elasmosaurid plesiosaur.
Zby - Dinosaur, sauropod.
Zenaspis - Fish, osteostracid.
Zephyrosaurus - Dinosaur, ornithopod.
Zhanghenglong - Dinosaur, hadrosaur.
Zhangheotherium - Mammal.
Zhejiangopterus - Pterosaur, azdharchid.
Zhejiangosaurus - Dinosaur, nodosaurid.
Zhenyuanopterus - Pterosaur, ornithocheirid.
Zhongjianichthys - Primitive fish.
Zhongornis - Bird.
Zhongyuansaurus - Dinosaur, ankylosaurid.
Zhuchengceratops - Dinosaur, leptoceratopsid.
Zhuchengtyrannus - Dinosaur, tyrannosaur.
Zhyrasuchus - Crocodile.
Zizhongosaurus - Dinosaur, sauropod.
Zoneait - Thalattosuchian (Marine crocodile).
Zulmasuchus - Crocodylomorph, notosuchian.
Zuniceratops - Dinosaur, ceratopsian.
Zuolong - Dinosaur, theropod.
Zupaysaurus - Dinosaur, theropod.
Zygomaturus - Mammal, diprotodont (giant wombat).
Zygophyseter - Mammal, whale (predatory).
Zygorhiza - Mammal, whale.
Zygosaurus - Amphibian, temnospondyl.