Genus/Species Skull Height Length Weight Stage Ablepharus L.Pleistocene A. borealis 15 cm? L.Pleistocene Acadiella U.Triassic A. psalidodon U.Triassic Acaenasuchus U.Triassic A. geoffroyi Carnian Acanthodactylus U.Pliocene-Recent cf. A. 1 cm? U.Pliocene Acanthotoposaurus see Youngina U.Permian A. bremneri see Youngina capensis U.Permian Acerodontosaurus 30 cm? U.Permian Acerosodontosaurus see Acerodontosaurus? Aciprion 3 cm M-U.Oligocene A. formosum 3 cm Chadronian-Orellan A. majus see Aciprion formosum Orellan A. sp. U.Oligocene A. sp. Orellan A. sp. Chadronian Acleisterorhinus see Acleistorhinus Acleistorhinus L.Permian A. pteroticus(pteronicus) Leonardian Acompsosaurus U.Triassic A. wingatensis U.Triassic Acrodenta U.Triassic A. irerhi U.Triassic Acrosaurus see Pleurosaurus A. frischmanni U.Jurassic Acteosaurus 41 cm M.Cretaceous A. crassicostatus M.Cretaceous A. tommasinii Adamisaurus U.Cretaceous A. magnidentatus 4.3 cm U.Cretaceous Adaphosaurus see Edaphosaurus Adarnisaurus Adelosaurus U.Permian A. huxleyi U.Permian Adriosaurus see Acteosaurus A. suessi Cenomanian-Turonian Aegirosaurus U.Jurassic A. leptospondylus U.Jurassic Aenigmosaurus U.Permian-L.Triassic A. grallator U.Permian-L.Triassic Aerosaurus 10 cm 76 cm L-U.Permian A. greenleeorum Wolfcampian A. wellesi 10 cm? 76 cm? L-U.Permian Aetosauroides 1.5 m U.Triassic A. scagliai(scagliari) see Stagonolepis robertsoni U.Triassic Aetosaurus L-U.Triassic A. arcuatus(arctuatus) L-U.Triassic A. crassicauda 1.5 m Triassic A. ferratus 90 cm Norian A. sp. Carnian Agama M.Paleocene-U.Miocene A. galliae U.Eocene-L.Oligocene A. sinensis M.Paleocene A. sp. U.Miocene Aigialosaurus 1.8 m M.Cretaceous A. buccichi(bucchichi) 18 cm 1.8 m M.Cretaceous A. dalmaticus 11 cm? 1 m? M.Cretaceous Aldzadasaurus see Alzadasaurus A. columbiensis see Alzadasaurus columbiensis Alethesaurus see Chamops A. quadratus see Chamops segnis Maastrichtian Altanteius U.Cretaceous A. facilis U.Cretaceous Alzadasaurus 9.2 m L.Cretaceous A. colombiensis see Callawayasaurus A. columbiensis see Callawayasaurus A. kansasensis see Styxosaurus snowi A. pembertoni see Styxosaurus snowi A. riggsi see Thalassomedon hanningtoni A. serpentinus A. tropicus L.Cretaceous Amblyolacerta M.Miocene A. dolnicensis Orleanian Ameiva U.Pleistocene-Recent A. auberi A. a. thoracica 18 cm? Rancholabrean-Recent A. chrysolaema living Jungle Runner Rancholabrean-Recent A. exsul 30 cm? Rancholabrean-Recent A. griswoldi Rancholabrean-Recent A. sp. 2.5 cm? Pleistocene A. taeniura living Jungle Runner Rancholabrean-Recent Amphekepubis 9.2 m U.Cretaceous A. johnsoni 9.2 m Santonian Amphibolurus Pleistocene A. sp. Pleistocene Amphorosteus U.Cretaceous A. brumbyi indeterminate material U.Cretaceous Anarosaurus M.Triassic A. heterodontus 5 cm? Anisian A. multidentatus see Cymatosaurus multidentatus A. pumilio(pumilis) 7.6 cm? Anisian Anchaosaurus U.Cretaceous A. gilmorei U.Cretaceous Anchaurosaurus U.Cretaceous A. gilmorei Campanian Ancistrodon see Ankistrodon Ancylocentrum see Prognathodon Angelosaurus U.Permian A. dolani U.Permian A. greeni U.Permian A. romeri U.Permian Angingosaurus see Anquingosaurus Angistorhinopsis see Rutiodon A. ruetimeyeri see Rutiodon ruetimeyeri Angistorhinus 9.8 m? U.Triassic A. aeolamnis 68 cm? Carnian A. alticephalus 122 cm 9.8 m? Carnian A. gracilis Carnian A. grandis 70 cm? Carnian A. maximus Carnian A. megalodon 124 cm 9.8 cm? Carnian A. talainti Carnian Angolasaurus U.Cretaceous A. bocagei see Platecarpus bocagei Turonian Anguingosaurus see Anquingosaurus Anhuisaurus preoccupied, see Chensaurus Anolis L.Miocene-Recent A. dominicanus L.Miocene-Pleistocene Angolosaurus see Angolasaurus A. bocagei see Angolasaurus bocagei Anguinosaurus see Pleurosaurus Anguis Oligocene-Pleistocene A. acutidentatus nomen dubium M.Miocene A. bibronianus see Ophisaurus bibronianus U.Miocene A. cf. Fragilis U.Pliocene-M.Pleistocene A. fragilis living Slow Worm Irvingtonian-Recent A. laurillardi see Ophisaurus laurillardi U.Miocene A. lemanensis nomen dubium U.Oligocene A. polgardiensis see Ophisaurus pannonicus A. robustus L.Miocene A. sp. L.Oligocene A. stammeri U.Pleistocene Anguisaurus see Pleurosaurus Anhuisaurus L.Triassic A. chaoxianensis see Chaohusaurus geishanensis Spathian A. faciles see Chaohusaurus geishanensis Spathian A. huainanensis indeterminate material Paleocene Anisimova? see Microcnemus sp. Anisodontosaurus L.Triassic A. greeri L.Triassic Ankistrodon see Chasmatosaurus L.Triassic A. indicus see Chasmatosaurus indicus L.Triassic Ankylosphenodon M.Cretaceous A. pachyostosus Albian Anniella U.Miocene-Recent A. sp. U.Miocene Anningia U.Permian A. megalops nomen vanum U.Permian Anolis U.Oligocene-Recent A. angusticeps living 8 cm? Rancholabrean-Recent A. bimaculatus A. b. leachii 24 cm? U.Pleistocene-Recent A. carolinensis living Green Anole Irvingtonian-Recent A. cf. Cristatellus 14 cm? Holocene A. chlorocyanus living 12 cm? Rancholabrean-Recent A. coelestinus Holocene A. cuvieri 3.7 cm 40 cm? Rancholabrean A. cybotes living 15 cm? Rancholabrean-Recent A. distichus 10 cm? Rancholabrean-Recent A. dominicanus 9 mm 14 cm? L.Miocene A. electrum 5 mm 6 cm? U.Oligocene-M.Miocene A. equestris living Holocene-Recent A. evermanni living 10 cm? Rancholabrean-Recent A. krugi living Rancholabrean-Recent A. leachii see Anolis bimaculatus leachii A. lucius Holocene A. occultus living 9 cm? Rancholabrean-Recent A. ricordi 38 cm? Rancholabrean-Holocene A. roquet living Holocene-Recent A. sagrei living 15 cm? Rancholabrean-Recent A. sp. L-U.Miocene A. sp. Pleistocene-Holocene A. spp. Rancholabrean-Holocene A. wattsii A. w. foresti see Anolis spp. Holocene Anomocephalus A. africanus Anomoiodon L.Triassic A. liliensterni L.Triassic Anomosaurus see Placodus A. no species given see Placodus gigas A. strunzi see Placodus gigas Anquingosaurus M.Paleocene A. brevicephalus M.Paleocene Anshunsaurus U.Triassic A. huangguoshuensis 35 cm? 3 m Ladinian-Carnian Anthodon 1 m U.Permian A. chlynoviensis see Deltavjatia vjatkensis Tatarian A. gregoryi 38 cm U.Permian A. haughtoni indeterminate material A. minusculus U.Permian A. nesemanni 23 cm U.Permian A. rossicus see Deltavjatia vjatkensis Tatarian A. serrarius see Deltavjatia vjatkensis Tatarian A. sp. U.Permian Anthracodromeus 16 cm? M.Pennsylvanian A. longipes Westphalian A. sp. Westphalian Apatodontosaurus see Ophthalmosaurus U.Jurassic Aphanizocnemus U.Cretaceous A. libanensis U.Cretaceous Aphelosaurus U.Permian A. lutevensis U.Permian Aphrosaurus 10.2 m U.Cretaceous A. furlongi see Morenosaurus stocki Maastrichtian Apodosauriscus L.Eocene A. minutus Wasatchian Apractocleides see Apractocleidus A. aldingeri see Apractocleidus Apractocleidus see Cryptocleidus A. aldingeri see Cryptocleidus aldingeri A. teretipes see Cryptocleidus eurymerus Apsisaurus L.Permian A. witteri Aptychodon U.Cretaceous Araeosaurus U.Cretaceous Araeoscelis 4.4 cm 60 cm L.Permian A. casei Wolfcampian A. gracilis 9 cm? Wolfcampian Archaeobelus see Clepsydrops L.Permian A. vellicatus see Clepsydrops collettii L.Permian Archaeobolus see Archaeobelus L.Permian A. vellicatus see Archaeobelus vellicatus L.Permian Archaeonectrus 50 cm 3.8 m L.Jurassic A. rostratus 50 cm 3.8 m Sinemurian Archaeothyris 9 cm 10 cm 50 cm M.Pennsylvanian A. florensis M.Pennsylvanian A. sp. Westphalian Archaeovenator U.Pennsylvanian A. hamiltonensis 3 cm? 34 cm? Stephanian Archerpeton see Amphibia Index L.Pennsylvanian A. anthracos Westphalian Archosaurus 28 cm 1.5 m U.Permian A. rossicus 28 cm Tatarian Archovaranus M.Jurassic A. klameliensis M.Jurassic Ardeosaurus 20 cm U.Jurassic A. brevipes 16 cm? U.Jurassic A. cf. Digitalellus U.Jurassic A. digitalellus 16 cm? U.Jurassic A. schroederi see Eichstaettisaurus schroederi Arganarhinus U.Triassic A. magnoculus 27.5 cm U.Triassic Argentinasuchus see Argentinosuchus? U.Triassic Argentinosuchus 15 cm 91 cm U.Triassic A. bonapartei see Stagonolepis robertsoni Carnian Aristelliger U.Pleistocene-Holocene A. lar Rancholabrean-Holocene A. praesignis Rancholabrean-Holocene A. sp. Rancholabrean A. titan see Aristelliger lar Rancholabrean-Holocene Aristodesmus see Sclerosaurus A. ruetimeyeri(rutimeyeri) see Sclerosaurus armatus Triassic Aristonectes 73.5 cm 8.3 m U.Cretaceous A. parvidens 73.5 cm 8.3 m Maastrichtian A. sp. see Aristonectes parvidens Maastrichtian Arizonasaurus L-M.Triassic A. babbitti Anisian Armandisaurus L.Miocene A. explorator Burdigalian-Hemphillian Arpadosaurus L.Eocene A. gazinorum 7 cm? Wasatchian Arretosaurus U.Eocene A. ornatus 8.5 cm? U.Eocene-Oligocene Arribasaurus see Ophiacodon A. navajovicus see Ophiacodon navajovicus L.Permian Arribasuchus U.Triassic A. buceros Rhaetian Asiacephalosaurus see Clevosaurus L.Jurassic A. wangi see Clevosaurus wangi L.Jurassic Askeptosaurus 20 cm 2 m M.Triassic A. italicus 2 m M.Triassic Atokasaurus L.Cretaceous A. metarsiodon Aptian-Albian Attenborosaurus 43 cm 5.1 m L.Jurassic A. conybeari(conybeare) 43 cm 5.1 m Sinemurian Augustasaurus M.Triassic A. hagdorni 37 cm 4 m? Anisian Axonoscincus L.Eocene A. sabatieri 1.5 cm? Ypresian Azendhosaurus U.Triassic A. laaroussii Carnian Baeotherates L.Permian B. fortsillensis L.Permian Bainguis U.Cretaceous B. parvus 2.2 cm Campanian B. sp. U.Cretaceous Baldwinonus L.Permian B. dunkardensis L.Permian B. trux L.Permian Baptanodon 4 m U.Jurassic B. discus U.Jurassic B. marshi B. natans U.Jurassic B. reedi B. robustus Baptosaurus U.Cretaceous B. fraternus see Plioplatecarpus depressus B. onchognathus see Halisaurus onchognathus B. platyspondylus see Halisaurus platyspondylus Barasaurus U.Permian B. besairiei