Reptile species and family browser

Colubridae 2,203 species · 262 genera

Colubridae, the colubrids, is the largest snake family, with 2,203 species in 262 genera, 52% of all snakes in the checklist. Its largest genus is Atractus, with 152 species.

Asian vine snakeCorn snakeEastern hognose snakeGopher snakeGray-banded kingsnakeGreat Plains rat snakeNorthern pine snakeSpeckled kingsnakeWestern rat snakeWestern terrestrial garter snake

Elapidae 412 species · 56 genera

Elapidae, the cobras, mambas, coral snakes and sea snakes, ranks 2 of 33 snake families by species count, with 412 species in 56 genera, 10% of all snakes in the checklist. Its largest genus is Micrurus, with 86 species.

Common death adder

Viperidae 412 species · 37 genera

Viperidae, the vipers and pit vipers, is the third-largest snake family, with 412 species in 37 genera, 10% of all snakes in the checklist. Its largest genus is Trimeresurus, with 61 species.

Broad-banded copperheadEastern copperheadFlorida cottonmouthNorthern cottonmouth

Typhlopidae 282 species · 19 genera

Typhlopidae, the blind snakes, is the fourth-largest snake family, with 282 species in 19 genera, 7% of all snakes in the checklist. Its largest genus is Anilios, with 48 species.

• Anilios48
• Letheobia37
• Afrotyphlops28
• Ramphotyphlops23
• Indotyphlops22
• Typhlops21
• Amerotyphlops19
• Madatyphlops14
• Antillotyphlops12
• Argyrophis12
• Cubatyphlops12
• Malayotyphlops12
• Rhinotyphlops7
• Acutotyphlops5
• Xerotyphlops5
• Pseudoindotyphlops2
• Cyclotyphlops1
• Grypotyphlops1
• Sundatyphlops1

Leptotyphlopidae 144 species · 14 genera

Leptotyphlopidae, the thread snakes, is the fifth-largest snake family, with 144 species in 14 genera, 3% of all snakes in the checklist. Its largest genus is Epictia, with 44 species.

• Epictia44
• Myriopholis25
• Leptotyphlops22
• Trilepida15
• Rena10
• Tricheilostoma6
• Namibiana5
• Mitophis4
• Siagonodon4
• Epacrophis3
• Tetracheilostoma3
• Habrophallos1
• Rhinoguinea1
• Rhinoleptus1

Lamprophiidae 94 species · 19 genera

Lamprophiidae, the African house snakes and relatives, ranks 6 of 33 snake families by species count, with 94 species in 19 genera, 2% of all snakes in the checklist. Its largest genus is Boaedon, with 28 species.

• Boaedon28
• Lycophidion23
• Lycodonomorphus7
• Limaformosa6
• Mehelya5
• Pseudoboodon5
• Chamaelycus3
• Gonionotophis3
• Lamprophis3
• Bothrophthalmus2
• Alopecion1
• Bofa1
• Bothrolycus1
• Dendrolycus1
• Elaiophis1
• Gracililima1
• Hormonotus1
• Inyoka1
• Montaspis1

Pseudoxyrhophiidae 89 species · 21 genera

Pseudoxyrhophiidae ranks 7 of 33 snake families by species count, with 89 species in 21 genera, 2% of all snakes in the checklist. Its largest genus is Pseudoxyrhopus, with 11 species.

• Pseudoxyrhopus11
• Liophidium10
• Lycodryas9
• Compsophis8
• Liopholidophis8
• Thamnosophis6
• Duberria5
• Ithycyphus5
• Madagascarophis5
• Heteroliodon3
• Langaha3
• Leioheterodon3
• Phisalixella3
• Alluaudina2
• Dromicodryas2
• Amplorhinus1
• Ditypophis1
• Elapotinus1
• Micropisthodon1
• Pararhadinaea1
• Parastenophis1

Uropeltidae 74 species · 7 genera

Uropeltidae, the shieldtail snakes, ranks 8 of 33 snake families by species count, with 74 species in 7 genera, 2% of all snakes in the checklist. Its largest genus is Uropeltis, with 29 species.

• Uropeltis29
• Rhinophis27
• Teretrurus8
• Melanophidium4
• Plectrurus3
• Platyplectrurus2
• Pseudoplectrurus1

Atractaspididae 68 species · 10 genera

Atractaspididae, the stiletto snakes and relatives, ranks 9 of 33 snake families by species count, with 68 species in 10 genera, 2% of all snakes in the checklist. Its largest genus is Atractaspis, with 22 species.

• Atractaspis22
• Polemon14
• Aparallactus11
• Amblyodipsas9
• Xenocalamus5
• Chilorhinophis2
• Homoroselaps2
• Hypoptophis1
• Macrelaps1
• Poecilopholis1

Boidae 67 species · 14 genera

Boidae, the boas, ranks 10 of 33 snake families by species count, with 67 species in 14 genera, 2% of all snakes in the checklist. Its largest genus is Chilabothrus, with 14 species.

Boa constrictorDumeril's boa

• Chilabothrus14
• Eryx13
• Corallus9
• Boa5
• Candoia5
• Epicrates5
• Eunectes4
• Acrantophis2
• Charina2
• Lichanura2
• Sanzinia2
• Ungaliophis2
• Calabaria1
• Exiliboa1

Homalopsidae 61 species · 29 genera

Homalopsidae, the mud snakes, ranks 11 of 33 snake families by species count, with 61 species in 29 genera, 1% of all snakes in the checklist. Its largest genus is Enhydris, with 6 species.

Psammophiidae 57 species · 8 genera

Psammophiidae, the sand snakes, ranks 12 of 33 snake families by species count, with 57 species in 8 genera, 1% of all snakes in the checklist. Its largest genus is Psammophis, with 35 species.

• Psammophis35
• Psammophylax6
• Hemirhagerrhis4
• Rhamphiophis4
• Malpolon3
• Kladirostratus2
• Mimophis2
• Dipsina1

Pareidae 49 species · 4 genera

Pareidae, the slug-eating snakes, ranks 13 of 33 snake families by species count, with 49 species in 4 genera, 1% of all snakes in the checklist. Its largest genus is Pareas, with 33 species.

• Pareas33
• Asthenodipsas9
• Xylophis6
• Aplopeltura1

Pythonidae 38 species · 11 genera

Pythonidae, the pythons, ranks 14 of 33 snake families by species count, with 38 species in 11 genera, under 1% of all snakes in the checklist. Its largest genus is Python, with 10 species.

Ball python

• Python10
• Morelia6
• Simalia6
• Antaresia4
• Liasis3
• Aspidites2
• Leiopython2
• Malayopython2
• Apodora1
• Bothrochilus1
• Nyctophilopython1

Xenodermidae 38 species · 6 genera

Xenodermidae ranks 15 of 33 snake families by species count, with 38 species in 6 genera, under 1% of all snakes in the checklist. Its largest genus is Achalinus, with 30 species.

• Achalinus30
• Fimbrios2
• Parafimbrios2
• Stoliczkia2
• Paraxenodermus1
• Xenodermus1

Tropidophiidae 37 species · 1 genus

Tropidophiidae, the dwarf boas, ranks 16 of 33 snake families by species count, with 37 species in 1 genus, under 1% of all snakes in the checklist. All of them belong to the genus Tropidophis.

• Tropidophis37

Gerrhopilidae 29 species · 2 genera

Gerrhopilidae, the Indo-Malayan blind snakes, ranks 17 of 33 snake families by species count, with 29 species in 2 genera, under 1% of all snakes in the checklist. Its largest genus is Gerrhopilus, with 28 species.

• Gerrhopilus28
• Cathetorhinus1

Anomalepididae 23 species · 4 genera

Anomalepididae, the dawn blind snakes, ranks 18 of 33 snake families by species count, with 23 species in 4 genera, under 1% of all snakes in the checklist. Its largest genus is Liotyphlops, with 15 species.

• Liotyphlops15
• Anomalepis4
• Helminthophis3
• Typhlophis1

Prosymnidae 19 species · 1 genus

Prosymnidae ranks 19 of 33 snake families by species count, with 19 species in 1 genus, under 1% of all snakes in the checklist. All of them belong to the genus Prosymna.

• Prosymna19

Cylindrophiidae 15 species · 1 genus

Cylindrophiidae, the Asian pipe snakes, ranks 20 of 33 snake families by species count, with 15 species in 1 genus, under 1% of all snakes in the checklist. All of them belong to the genus Cylindrophis.

• Cylindrophis15

Cyclocoridae 8 species · 5 genera

Cyclocoridae ranks 21 of 33 snake families by species count, with 8 species in 5 genera, under 1% of all snakes in the checklist. Its largest genus is Cyclocorus, with 2 species.

• Cyclocorus2
• Hologerrhum2
• Oxyrhabdium2
• Levitonius1
• Myersophis1

Micrelapidae 6 species · 2 genera

Micrelapidae ranks 22 of 33 snake families by species count, with 6 species in 2 genera, under 1% of all snakes in the checklist. Its largest genus is Brachyophis, with 3 species.

• Brachyophis3
• Micrelaps3

Elapoidea 4 species · 1 genus

Elapoidea is not a family in the usual sense: the checklist uses it for the 4 species of Buhoma, African forest snakes that have not been assigned to a family.

• Buhoma4

Acrochordidae 3 species · 1 genus

Acrochordidae, the file snakes, ranks 24 of 33 snake families by species count, with 3 species in 1 genus, under 1% of all snakes in the checklist. All of them belong to the genus Acrochordus.

• Acrochordus3

Anomochilidae 3 species · 1 genus

Anomochilidae, the dwarf pipe snakes, ranks 25 of 33 snake families by species count, with 3 species in 1 genus, under 1% of all snakes in the checklist. All of them belong to the genus Anomochilus.

• Anomochilus3

Xenopeltidae 3 species · 1 genus

Xenopeltidae, the sunbeam snakes, ranks 26 of 33 snake families by species count, with 3 species in 1 genus, under 1% of all snakes in the checklist. All of them belong to the genus Xenopeltis.

• Xenopeltis3

Bolyeriidae 2 species · 2 genera

Bolyeriidae, the Round Island boas, ranks 27 of 33 snake families by species count, with 2 species in 2 genera, under 1% of all snakes in the checklist. Its largest genus is Bolyeria, with 1 species.

• Bolyeria1
• Casarea1

Psammodynastidae 2 species · 1 genus

Psammodynastidae ranks 28 of 33 snake families by species count, with 2 species in 1 genus, under 1% of all snakes in the checklist. All of them belong to the genus Psammodynastes.

• Psammodynastes2

Pseudaspididae 2 species · 2 genera

Pseudaspididae, the mole snake and its relative, ranks 29 of 33 snake families by species count, with 2 species in 2 genera, under 1% of all snakes in the checklist. Its largest genus is Pseudaspis, with 1 species.

• Pseudaspis1
• Pythonodipsas1

Xenophidiidae 2 species · 1 genus

Xenophidiidae ranks 30 of 33 snake families by species count, with 2 species in 1 genus, under 1% of all snakes in the checklist. All of them belong to the genus Xenophidion.

• Xenophidion2

Aniliidae 1 species · 1 genus

Aniliidae, the South American pipe snake, is one of the smallest snake families, with a single species in the genus Anilius.

• Anilius1

Loxocemidae 1 species · 1 genus

Loxocemidae, the Mexican burrowing python, is one of the smallest snake families, with a single species in the genus Loxocemus.

• Loxocemus1

Xenotyphlopidae 1 species · 1 genus

Xenotyphlopidae is one of the smallest snake families, with a single species in the genus Xenotyphlops.

• Xenotyphlops1

Scincidae 1,817 species · 170 genera

Scincidae, the skinks, is the largest lizard family, with 1,817 species in 170 genera, 23% of all lizards in the checklist. Its largest genus is Sphenomorphus, with 120 species.

Common blue-tongued skinkIndonesian blue-tongued skinkRed-eyed crocodile skink

Gekkonidae 1,750 species · 60 genera

Gekkonidae, the typical geckos, is the second-largest lizard family, with 1,750 species in 60 genera, 22% of all lizards in the checklist. Its largest genus is Cyrtodactylus, with 403 species.

Electric blue geckoKlemmer's day geckoStanding's day gecko

Agamidae 616 species · 64 genera

Agamidae, the agamas and dragons, is the third-largest lizard family, with 616 species in 64 genera, 8% of all lizards in the checklist. Its largest genus is Diploderma, with 50 species.

Australian water dragonCentral bearded dragonCommon agamaRankin's dragon

Anolidae 428 species · 1 genus

Anolidae, the anoles, is the fourth-largest lizard family, with 428 species in 1 genus, 5% of all lizards in the checklist. All of them belong to the genus Anolis.

Green anole

• Anolis428

Lacertidae 391 species · 43 genera

Lacertidae, the wall lizards and lacertas, is the fifth-largest lizard family, with 391 species in 43 genera, 5% of all lizards in the checklist. Its largest genus is Acanthodactylus, with 45 species.

Liolaemidae 343 species · 3 genera

Liolaemidae, the liolaemid lizards of South America, ranks 6 of 43 lizard families by species count, with 343 species in 3 genera, 4% of all lizards in the checklist. Its largest genus is Liolaemus, with 290 species.

• Liolaemus290
• Phymaturus52
• Ctenoblepharys1

Gymnophthalmidae 302 species · 56 genera

Gymnophthalmidae, the spectacled lizards, ranks 7 of 43 lizard families by species count, with 302 species in 56 genera, 4% of all lizards in the checklist. Its largest genus is Bachia, with 31 species.

Chamaeleonidae 240 species · 12 genera

Chamaeleonidae, the chameleons, ranks 8 of 43 lizard families by species count, with 240 species in 12 genera, 3% of all lizards in the checklist. Its largest genus is Calumma, with 44 species.

Carpet chameleonOustalet's chameleon

• Calumma44
• Trioceros41
• Brookesia32
• Rhampholeon30
• Furcifer24
• Kinyongia23
• Bradypodion20
• Chamaeleo14
• Nadzikambia6
• Rieppeleon3
• Palleon2
• Archaius1

Sphaerodactylidae 239 species · 12 genera

Sphaerodactylidae, the dwarf geckos, ranks 9 of 43 lizard families by species count, with 239 species in 12 genera, 3% of all lizards in the checklist. Its largest genus is Sphaerodactylus, with 109 species.

• Sphaerodactylus109
• Gonatodes34
• Pristurus32
• Lepidoblepharis21
• Aristelliger9
• Pseudogonatodes9
• Teratoscincus9
• Saurodactylus7
• Coleodactylus5
• Quedenfeldtia2
• Chatogekko1
• Euleptes1

Diplodactylidae 202 species · 25 genera

Diplodactylidae, the diplodactylid geckos of Australia and New Caledonia, ranks 10 of 43 lizard families by species count, with 202 species in 25 genera, 3% of all lizards in the checklist. Its largest genus is Bavayia, with 41 species.

Crested geckoMossy prehensile-tailed geckoNew Caledonian giant gecko

Amphisbaenidae 185 species · 12 genera

Amphisbaenidae, the worm lizards, ranks 11 of 43 lizard families by species count, with 185 species in 12 genera, 2% of all lizards in the checklist. Its largest genus is Amphisbaena, with 103 species.

• Amphisbaena103
• Cynisca20
• Monopeltis20
• Leposternon11
• Zygaspis9
• Dalophia7
• Chirindia5
• Ancylocranium3
• Geocalamus2
• Loveridgea2
• Mesobaena2
• Baikia1

Teiidae 173 species · 18 genera

Teiidae, the whiptails and tegus, ranks 12 of 43 lizard families by species count, with 173 species in 18 genera, 2% of all lizards in the checklist. Its largest genus is Aspidoscelis, with 45 species.

Argentine black and white teguGold teguRed tegu

• Aspidoscelis45
• Pholidoscelis21
• Cnemidophorus19
• Holcosus18
• Ameiva14
• Ameivula11
• Kentropyx9
• Tupinambis8
• Contomastix6
• Glaucomastix5
• Dicrodon3
• Salvator3
• Teius3
• Aurivela2
• Callopistes2
• Dracaena2
• Crocodilurus1
• Medopheos1

Phrynosomatidae 170 species · 9 genera

Phrynosomatidae, the spiny, fence and horned lizards, ranks 13 of 43 lizard families by species count, with 170 species in 9 genera, 2% of all lizards in the checklist. Its largest genus is Sceloporus, with 117 species.

Desert horned lizardEastern fence lizardTexas horned lizardWestern fence lizard

• Sceloporus117
• Phrynosoma18
• Urosaurus9
• Uma7
• Uta7
• Holbrookia6
• Petrosaurus4
• Callisaurus1
• Cophosaurus1

Phyllodactylidae 169 species · 10 genera

Phyllodactylidae, the leaf-toed geckos, ranks 14 of 43 lizard families by species count, with 169 species in 10 genera, 2% of all lizards in the checklist. Its largest genus is Phyllodactylus, with 68 species.

• Phyllodactylus68
• Tarentola33
• Asaccus18
• Homonota16
• Ptyodactylus14
• Phyllopezus9
• Gymnodactylus5
• Thecadactylus3
• Haemodracon2
• Garthia1

Tropiduridae 150 species · 8 genera

Tropiduridae, the Neotropical ground lizards, ranks 15 of 43 lizard families by species count, with 150 species in 8 genera, 2% of all lizards in the checklist. Its largest genus is Stenocercus, with 81 species.

• Stenocercus81
• Tropidurus30
• Microlophus24
• Plica8
• Eurolophosaurus3
• Uracentron2
• Strobilurus1
• Uranoscodon1

Varanidae 93 species · 1 genus

Varanidae, the monitor lizards, ranks 16 of 43 lizard families by species count, with 93 species in 1 genus, 1% of all lizards in the checklist. All of them belong to the genus Varanus.

Black-headed monitorMertens' water monitor

• Varanus93

Anguidae 90 species · 11 genera

Anguidae, the alligator lizards, glass lizards and slow worms, ranks 17 of 43 lizard families by species count, with 90 species in 11 genera, 1% of all lizards in the checklist. Its largest genus is Abronia, with 39 species.

Slow wormSouthern alligator lizard

• Abronia39
• Gerrhonotus9
• Dopasia8
• Barisia7
• Elgaria7
• Anniella6
• Ophisaurus6
• Anguis5
• Desertum1
• Hyalosaurus1
• Pseudopus1

Diploglossidae 90 species · 12 genera

Diploglossidae, the galliwasps, ranks 18 of 43 lizard families by species count, with 90 species in 12 genera, 1% of all lizards in the checklist. Its largest genus is Panolopus, with 20 species.

• Panolopus20
• Celestus14
• Siderolamprus14
• Diploglossus10
• Sauresia8
• Comptus6
• Ophiodes6
• Wetmorena6
• Caribicus3
• Advenus1
• Guarocuyus1
• Mesoamericus1

Cordylidae 70 species · 10 genera

Cordylidae, the girdled lizards, ranks 19 of 43 lizard families by species count, with 70 species in 10 genera, under 1% of all lizards in the checklist. Its largest genus is Cordylus, with 23 species.

• Cordylus23
• Platysaurus16
• Smaug9
• Chamaesaura6
• Namazonurus5
• Pseudocordylus5
• Hemicordylus2
• Karusasaurus2
• Ninurta1
• Ouroborus1

Pygopodidae 50 species · 7 genera

Pygopodidae, the flap-footed lizards, ranks 20 of 43 lizard families by species count, with 50 species in 7 genera, under 1% of all lizards in the checklist. Its largest genus is Delma, with 25 species.

• Delma25
• Aprasia14
• Pygopus5
• Lialis2
• Pletholax2
• Ophidiocephalus1
• Paradelma1

Eublepharidae 47 species · 6 genera

Eublepharidae, the eyelid geckos, ranks 21 of 43 lizard families by species count, with 47 species in 6 genera, under 1% of all lizards in the checklist. Its largest genus is Goniurosaurus, with 25 species.

Cat geckoLeopard geckoWestern banded gecko

• Goniurosaurus25
• Coleonyx9
• Eublepharis8
• Hemitheconyx2
• Holodactylus2
• Aeluroscalabotes1

Iguanidae 45 species · 9 genera

Iguanidae, the iguanas, ranks 22 of 43 lizard families by species count, with 45 species in 9 genera, under 1% of all lizards in the checklist. Its largest genus is Ctenosaura, with 15 species.

Black spiny-tailed iguanaGreen iguanaMarine iguanaMexican spiny-tailed iguana

• Ctenosaura15
• Cyclura11
• Sauromalus5
• Brachylophus4
• Conolophus3
• Cachryx2
• Dipsosaurus2
• Iguana2
• Amblyrhynchus1

Gerrhosauridae 39 species · 7 genera

Gerrhosauridae, the plated lizards, ranks 23 of 43 lizard families by species count, with 39 species in 7 genera, under 1% of all lizards in the checklist. Its largest genus is Zonosaurus, with 17 species.

• Zonosaurus17
• Gerrhosaurus8
• Tetradactylus8
• Matobosaurus2
• Tracheloptychus2
• Broadleysaurus1
• Cordylosaurus1

Leiosauridae 38 species · 5 genera

Leiosauridae ranks 24 of 43 lizard families by species count, with 38 species in 5 genera, under 1% of all lizards in the checklist. Its largest genus is Enyalius, with 11 species.

• Enyalius11
• Pristidactylus10
• Diplolaemus7
• Urostrophus6
• Leiosaurus4

Xantusiidae 38 species · 3 genera

Xantusiidae, the night lizards, ranks 25 of 43 lizard families by species count, with 38 species in 3 genera, under 1% of all lizards in the checklist. Its largest genus is Lepidophyma, with 23 species.

• Lepidophyma23
• Xantusia14
• Cricosaura1

Carphodactylidae 34 species · 7 genera

Carphodactylidae, the knob-tailed and leaf-tailed geckos, ranks 26 of 43 lizard families by species count, with 34 species in 7 genera, under 1% of all lizards in the checklist. Its largest genus is Nephrurus, with 11 species.

Smooth knob-tailed gecko

• Nephrurus11
• Phyllurus11
• Saltuarius7
• Underwoodisaurus2
• Carphodactylus1
• Orraya1
• Uvidicolus1

Alopoglossidae 32 species · 1 genus

Alopoglossidae ranks 27 of 43 lizard families by species count, with 32 species in 1 genus, under 1% of all lizards in the checklist. All of them belong to the genus Alopoglossus.

• Alopoglossus32

Dibamidae 31 species · 2 genera

Dibamidae, the blind lizards, ranks 28 of 43 lizard families by species count, with 31 species in 2 genera, under 1% of all lizards in the checklist. Its largest genus is Dibamus, with 30 species.

• Dibamus30
• Anelytropsis1

Leiocephalidae 30 species · 1 genus

Leiocephalidae, the curly-tailed lizards, ranks 29 of 43 lizard families by species count, with 30 species in 1 genus, under 1% of all lizards in the checklist. All of them belong to the genus Leiocephalus.

• Leiocephalus30

Hoplocercidae 22 species · 2 genera

Hoplocercidae, the wood lizards, ranks 30 of 43 lizard families by species count, with 22 species in 2 genera, under 1% of all lizards in the checklist. Its largest genus is Enyalioides, with 21 species.

• Enyalioides21
• Hoplocercus1

Xenosauridae 14 species · 1 genus

Xenosauridae, the knob-scaled lizards, ranks 31 of 43 lizard families by species count, with 14 species in 1 genus, under 1% of all lizards in the checklist. All of them belong to the genus Xenosaurus.

• Xenosaurus14

Crotaphytidae 12 species · 2 genera

Crotaphytidae, the collared and leopard lizards, ranks 32 of 43 lizard families by species count, with 12 species in 2 genera, under 1% of all lizards in the checklist. Its largest genus is Crotaphytus, with 9 species.

Eastern collared lizardLong-nosed leopard lizard

• Crotaphytus9
• Gambelia3

Corytophanidae 11 species · 3 genera

Corytophanidae, the basilisks and casquehead lizards, ranks 33 of 43 lizard families by species count, with 11 species in 3 genera, under 1% of all lizards in the checklist. Its largest genus is Basiliscus, with 4 species.

• Basiliscus4
• Laemanctus4
• Corytophanes3

Opluridae 8 species · 2 genera

Opluridae, the Madagascan iguanas, ranks 34 of 43 lizard families by species count, with 8 species in 2 genera, under 1% of all lizards in the checklist. Its largest genus is Oplurus, with 6 species.

• Oplurus6
• Chalarodon2

Polychrotidae 8 species · 1 genus

Polychrotidae, the bush anoles, ranks 35 of 43 lizard families by species count, with 8 species in 1 genus, under 1% of all lizards in the checklist. All of them belong to the genus Polychrus.

• Polychrus8

Blanidae 7 species · 1 genus

Blanidae, the Mediterranean worm lizards, ranks 36 of 43 lizard families by species count, with 7 species in 1 genus, under 1% of all lizards in the checklist. All of them belong to the genus Blanus.

• Blanus7

Trogonophidae 6 species · 4 genera

Trogonophidae ranks 37 of 43 lizard families by species count, with 6 species in 4 genera, under 1% of all lizards in the checklist. Its largest genus is Agamodon, with 3 species.

• Agamodon3
• Diplometopon1
• Pachycalamus1
• Trogonophis1

Helodermatidae 5 species · 1 genus

Helodermatidae, the Gila monster and beaded lizards, ranks 38 of 43 lizard families by species count, with 5 species in 1 genus, under 1% of all lizards in the checklist. All of them belong to the genus Heloderma.

Gila monsterMexican beaded lizard

• Heloderma5

Bipedidae 3 species · 1 genus

Bipedidae, the two-legged worm lizards, ranks 39 of 43 lizard families by species count, with 3 species in 1 genus, under 1% of all lizards in the checklist. All of them belong to the genus Bipes.

• Bipes3

Cadeidae 2 species · 1 genus

Cadeidae ranks 40 of 43 lizard families by species count, with 2 species in 1 genus, under 1% of all lizards in the checklist. All of them belong to the genus Cadea.

• Cadea2

Lanthanotidae 1 species · 1 genus

Lanthanotidae, the earless monitor, is one of the smallest lizard families, with a single species in the genus Lanthanotus.

• Lanthanotus1

Rhineuridae 1 species · 1 genus

Rhineuridae, the Florida worm lizard, is one of the smallest lizard families, with a single species in the genus Rhineura.

• Rhineura1

Shinisauridae 1 species · 1 genus

Shinisauridae, the Chinese crocodile lizard, is one of the smallest lizard families, with a single species in the genus Shinisaurus.

• Shinisaurus1

Geoemydidae 75 species · 19 genera

Geoemydidae, the Asian pond and box turtles, is the largest turtle family, with 75 species in 19 genera, 20% of all turtles in the checklist. Its largest genus is Cuora, with 17 species.

• Cuora17
• Mauremys9
• Rhinoclemmys9
• Cyclemys7
• Batagur6
• Heosemys4
• Pangshura4
• Malayemys3
• Geoemyda2
• Melanochelys2
• Morenia2
• Sacalia2
• Siebenrockiella2
• Geoclemys1
• Hardella1
• Leucocephalon1
• Notochelys1
• Orlitia1
• Vijayachelys1

Chelidae 66 species · 15 genera

Chelidae, the Austro-American side-necked turtles, is the second-largest turtle family, with 66 species in 15 genera, 18% of all turtles in the checklist. Its largest genus is Chelodina, with 16 species.

• Chelodina16
• Elseya14
• Mesoclemmys9
• Emydura5
• Acanthochelys4
• Myuchelys4
• Phrynops4
• Chelus2
• Hydromedusa2
• Elusor1
• Platemys1
• Pseudemydura1
• Ranacephala1
• Rheodytes1
• Rhinemys1

Emydidae 58 species · 12 genera

Emydidae, the pond turtles, sliders and box turtles, is the third-largest turtle family, with 58 species in 12 genera, 16% of all turtles in the checklist. Its largest genus is Trachemys, with 17 species.

Florida red-bellied cooterNorthwestern pond turtleOrnate box turtleRed-eared sliderRiver cooter

• Trachemys17
• Graptemys14
• Pseudemys8
• Terrapene7
• Actinemys2
• Chrysemys2
• Emys2
• Glyptemys2
• Clemmys1
• Deirochelys1
• Emydoidea1
• Malaclemys1

Testudinidae 47 species · 17 genera

Testudinidae, the tortoises, is the fourth-largest turtle family, with 47 species in 17 genera, 13% of all turtles in the checklist. Its largest genus is Kinixys, with 8 species.

Aldabra giant tortoise

• Kinixys8
• Gopherus6
• Testudo5
• Chelonoidis4
• Chersobius3
• Indotestudo3
• Psammobates3
• Astrochelys2
• Geochelone2
• Homopus2
• Manouria2
• Pyxis2
• Aldabrachelys1
• Centrochelys1
• Chersina1
• Malacochersus1
• Stigmochelys1

Trionychidae 36 species · 13 genera

Trionychidae, the softshell turtles, is the fifth-largest turtle family, with 36 species in 13 genera, 10% of all turtles in the checklist. Its largest genus is Pelodiscus, with 8 species.

Chinese softshell turtleSpiny softshell

• Pelodiscus8
• Nilssonia5
• Apalone3
• Chitra3
• Lissemys3
• Pelochelys3
• Amyda2
• Cyclanorbis2
• Cycloderma2
• Rafetus2
• Dogania1
• Palea1
• Trionyx1

Kinosternidae 35 species · 4 genera

Kinosternidae, the mud and musk turtles, ranks 6 of 14 turtle families by species count, with 35 species in 4 genera, 9% of all turtles in the checklist. Its largest genus is Kinosternon, with 26 species.

Eastern mud turtleRazor-backed musk turtle

• Kinosternon26
• Sternotherus6
• Staurotypus2
• Claudius1

Pelomedusidae 28 species · 2 genera

Pelomedusidae, the African side-necked turtles, ranks 7 of 14 turtle families by species count, with 28 species in 2 genera, 8% of all turtles in the checklist. Its largest genus is Pelusios, with 18 species.

West African mud turtle

• Pelusios18
• Pelomedusa10

Podocnemididae 8 species · 3 genera

Podocnemididae, the South American and Madagascan side-necked river turtles, ranks 8 of 14 turtle families by species count, with 8 species in 3 genera, 2% of all turtles in the checklist. Its largest genus is Podocnemis, with 6 species.

• Podocnemis6
• Erymnochelys1
• Peltocephalus1

Cheloniidae 6 species · 5 genera

Cheloniidae, the hard-shelled sea turtles, ranks 9 of 14 turtle families by species count, with 6 species in 5 genera, 2% of all turtles in the checklist. Its largest genus is Lepidochelys, with 2 species.

• Lepidochelys2
• Caretta1
• Chelonia1
• Eretmochelys1
• Natator1

Chelydridae 5 species · 2 genera

Chelydridae, the snapping turtles, ranks 10 of 14 turtle families by species count, with 5 species in 2 genera, 1% of all turtles in the checklist. Its largest genus is Chelydra, with 3 species.

• Chelydra3
• Macrochelys2

Platysternidae 3 species · 1 genus

Platysternidae, the big-headed turtles, ranks 11 of 14 turtle families by species count, with 3 species in 1 genus, under 1% of all turtles in the checklist. All of them belong to the genus Platysternon.

• Platysternon3

Carettochelyidae 1 species · 1 genus

Carettochelyidae, the pig-nosed turtle, is one of the smallest turtle families, with a single species in the genus Carettochelys.

• Carettochelys1

Dermatemydidae 1 species · 1 genus

Dermatemydidae, the Central American river turtle, is one of the smallest turtle families, with a single species in the genus Dermatemys.

• Dermatemys1

Dermochelyidae 1 species · 1 genus

Dermochelyidae, the leatherback sea turtle, is one of the smallest turtle families, with a single species in the genus Dermochelys.

• Dermochelys1

Crocodylidae 18 species · 4 genera

Crocodylidae, the true crocodiles, is the largest crocodilian family, with 18 species in 4 genera, 67% of all crocodilians in the checklist. Its largest genus is Crocodylus, with 13 species.

• Crocodylus13
• Mecistops2
• Osteolaemus2
• Tomistoma1

Alligatoridae 8 species · 4 genera

Alligatoridae, the alligators and caimans, is the second-largest crocodilian family, with 8 species in 4 genera, 30% of all crocodilians in the checklist. Its largest genus is Caiman, with 3 species.

American alligatorChinese alligator

• Caiman3
• Alligator2
• Paleosuchus2
• Melanosuchus1

Gavialidae 1 species · 1 genus

Gavialidae, the gharial, is one of the smallest crocodilian families, with a single species in the genus Gavialis.

• Gavialis1

Sphenodontidae 1 species · 1 genus

Sphenodontidae, the tuatara, is the only living family in the order Rhynchocephalia. It has a single species, Sphenodon punctatus, found only in New Zealand.

• Sphenodon1