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| © Rune Midtgaard |
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Biodiversity of the reptile genera of USA  excl. introduced, extinct, unconfirmed, and unnamed species |
Species |
Endemic species |
Endemism (species) |
Species in % of all reptile species in USA |
 | ||||
| Worm Lizards (Amphisbaenia) | ||||
| Family Rhineuridae (Florida Worm Lizard) |
Species | Endemic species |
Endemism (species) |
Species in % of all reptile species in USA |
| Rhineura (Florida Worm Lizard) | 1 | 1 | 100.0 % | 0.3 % |
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| Crocodilians (Crocodylia) | ||||
| Family Alligatoridae (Alligators and Caimans) |
Species | Endemic species |
Endemism (species) |
Species in % of all reptile species in USA |
| Alligator (Alligators) | 1 | 1 | 100.0 % | 0.3 % |
| Family Crocodylidae (Crocodiles) |
Species | Endemic species |
Endemism (species) |
Species in % of all reptile species in USA |
| Crocodylus (Typical Crocodiles) | 1 | 0 | 0.0 % | 0.3 % |
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| Lizards (Sauria) | ||||
| Family Anguidae (Slowworms. etc.) |
Species | Endemic species |
Endemism (species) |
Species in % of all reptile species in USA |
| Gerrhonotus (Eastern Alligator Lizards) | 1 | 0 | 0.0 % | 0.3 % |
| Elgaria (Western Alligator Lizards) | 4 | 1 | 25.0 % | 1.1 % |
| Ophisaurus (North American Glass Lizards) | 4 | 4 | 100.0 % | 1.1 % |
| Family Anniellidae (North American Legless Lizards) |
Species | Endemic species |
Endemism (species) |
Species in % of all reptile species in USA |
| Anniella (North American Legless Lizards) | 5 | 4 | 80.0 % | 1.4 % |
| Family Crotaphytidae (North American Collared Lizards) |
Species | Endemic species |
Endemism (species) |
Species in % of all reptile species in USA |
| Gambelia (North American Leopard Lizards) | 3 | 1 | 33.3 % | 0.8 % |
| Crotaphytus (Typical Collared Lizards) | 5 | 1 | 20.0 % | 1.4 % |
| Family Dactyloidae (Anoles) |
Species | Endemic species |
Endemism (species) |
Species in % of all reptile species in USA |
| Anolis (Typical Anoles) | 1 | 1 | 100.0 % | 0.3 % |
| Family Eublepharidae (Eyelid Geckos) |
Species | Endemic species |
Endemism (species) |
Species in % of all reptile species in USA |
| Coleonyx (Banded Eyelid Geckos) | 4 | 0 | 0.0 % | 1.1 % |
| Family Helodermatidae (Beaded Lizards) |
Species | Endemic species |
Endemism (species) |
Species in % of all reptile species in USA |
| Heloderma (Beaded Lizards) | 1 | 0 | 0.0 % | 0.3 % |
| Family Iguanidae (Greater Iguanas) |
Species | Endemic species |
Endemism (species) |
Species in % of all reptile species in USA |
| Dipsosaurus (Desert Iguanas) | 1 | 0 | 0.0 % | 0.3 % |
| Sauromalus (North American Chuckwallas) | 1 | 0 | 0.0 % | 0.3 % |
| Family Phrynosomatidae (North American Lesser Iguanas) |
Species | Endemic species |
Endemism (species) |
Species in % of all reptile species in USA |
| Callisaurus (Zebra-tailed Lizard) | 1 | 0 | 0.0 % | 0.3 % |
| Cophosaurus (Greater Earless Lizard) | 1 | 0 | 0.0 % | 0.3 % |
| Petrosaurus (Baja California Rock Lizards) | 1 | 0 | 0.0 % | 0.3 % |
| Uta (Side-blotched Lizards) | 1 | 0 | 0.0 % | 0.3 % |
| Uma (North American Fringe-toed Lizards) | 4 | 2 | 50.0 % | 1.1 % |
| Urosaurus (North American Tree Lizards) | 4 | 0 | 0.0 % | 1.1 % |
| Holbrookia (Lesser Earless Lizards) | 5 | 0 | 0.0 % | 1.4 % |
| Phrynosoma (Horned Lizards) | 13 | 2 | 15.4 % | 3.5 % |
| Sceloporus (Northern Spiny Lizards) | 24 | 7 | 29.2 % | 6.5 % |
| Family Phyllodactylidae (Leaf-toed Geckos) |
Species | Endemic species |
Endemism (species) |
Species in % of all reptile species in USA |
| Phyllodactylus (American Leaf-toed Geckos) | 1 | 0 | 0.0 % | 0.3 % |
| Family Scincidae (Skinks) |
Species | Endemic species |
Endemism (species) |
Species in % of all reptile species in USA |
| Scincella (South Asian and American Ground Skinks) | 1 | 0 | 0.0 % | 0.3 % |
| Plestiodon (Blue-tailed Skinks) | 13 | 5 | 38.5 % | 3.5 % |
| Family Teiidae (Greater Tejus) |
Species | Endemic species |
Endemism (species) |
Species in % of all reptile species in USA |
| Aspidoscelis (Northern Whiptails) | 20 | 5 | 25.0 % | 5.4 % |
| Family Xantusiidae (Night Lizards) |
Species | Endemic species |
Endemism (species) |
Species in % of all reptile species in USA |
| Xantusia (Northern Night Lizards) | 8 | 6 | 75.0 % | 2.2 % |
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| Snakes (Serpentes) | ||||
| Family Boidae (Typical Boas) |
Species | Endemic species |
Endemism (species) |
Species in % of all reptile species in USA |
| Charina (Rubber Boas) | 2 | 1 | 50.0 % | 0.5 % |
| Lichanura (Rosy Boas) | 2 | 1 | 50.0 % | 0.5 % |
| Family Colubridae (Typical Snakes) |
Species | Endemic species |
Endemism (species) |
Species in % of all reptile species in USA |
| Clonophis (Ohio Valley Water Snake) | 1 | 1 | 100.0 % | 0.3 % |
| Coluber (North American Racer) | 1 | 0 | 0.0 % | 0.3 % |
| Coniophanes (Black-striped Snakes) | 1 | 0 | 0.0 % | 0.3 % |
| Diadophis (Ring-necked Snake) | 1 | 0 | 0.0 % | 0.3 % |
| Drymobius (Central American Racers) | 1 | 0 | 0.0 % | 0.3 % |
| Ficimia (Eastern Hook-nosed Snakes) | 1 | 0 | 0.0 % | 0.3 % |
| Haldea (Rough Earth Snake) | 1 | 1 | 100.0 % | 0.3 % |
| Leptodeira (Typical Cat-eyed Snakes) | 1 | 0 | 0.0 % | 0.3 % |
| Oxybelis (Neotropical Vine Snakes) | 1 | 0 | 0.0 % | 0.3 % |
| Rhadinaea (Graceful Brown Snakes) | 1 | 1 | 100.0 % | 0.3 % |
| Rhinocheilus (Long-nosed Snakes) | 1 | 0 | 0.0 % | 0.3 % |
| Senticolis (American Green Rat Snake) | 1 | 0 | 0.0 % | 0.3 % |
| Tropidoclonion (Lined Snake) | 1 | 1 | 100.0 % | 0.3 % |
| Virginia (Smooth Earth Snake) | 1 | 1 | 100.0 % | 0.3 % |
| Arizona (Glossy Snakes) | 2 | 0 | 0.0 % | 0.5 % |
| Bogertophis (Desert Rat Snakes) | 2 | 0 | 0.0 % | 0.5 % |
| Carphophis (North American Worm Snakes) | 2 | 2 | 100.0 % | 0.5 % |
| Cemophora (North American Scarlet Snakes) | 2 | 2 | 100.0 % | 0.5 % |
| Contia (Sharp-tailed Snakes) | 2 | 1 | 50.0 % | 0.5 % |
| Farancia (American Mud and Rainbow Snakes) | 2 | 2 | 100.0 % | 0.5 % |
| Gyalopion (Western Hook-nosed Snakes) | 2 | 0 | 0.0 % | 0.5 % |
| Opheodrys (North American Green Snakes) | 2 | 0 | 0.0 % | 0.5 % |
| Phyllorhynchus (American Leaf-nosed Snakes) | 2 | 0 | 0.0 % | 0.5 % |
| Regina (Queen Snakes) | 2 | 1 | 50.0 % | 0.5 % |
| Drymarchon (Indigo Snakes & Cribos) | 3 | 2 | 66.7 % | 0.8 % |
| Hypsiglena (North American Night Snakes) | 3 | 0 | 0.0 % | 0.8 % |
| Liodytes (North American Swamp Snakes) | 3 | 3 | 100.0 % | 0.8 % |
| Pituophis (Bullsnakes. Pine Snakes & Gopher Snakes) | 3 | 2 | 66.7 % | 0.8 % |
| Salvadora (Patch-nosed Snakes) | 3 | 0 | 0.0 % | 0.8 % |
| Storeria (North American Brown Snakes) | 3 | 1 | 33.3 % | 0.8 % |
| Trimorphodon (Lyre Snakes) | 3 | 0 | 0.0 % | 0.8 % |
| Heterodon (North American Hognose Snakes) | 5 | 2 | 40.0 % | 1.4 % |
| Masticophis (North American Whip Snakes & Coachwhips) | 7 | 0 | 0.0 % | 1.9 % |
| Sonora (North American Ground. Sand. and Shovel-nosed Snakes) | 7 | 2 | 28.6 % | 1.9 % |
| Pantherophis (North American Rat Snakes) | 9 | 5 | 55.6 % | 2.4 % |
| Nerodia (North American Water Snakes) | 10 | 6 | 60.0 % | 2.7 % |
| Tantilla (American Centipede Snakes) | 11 | 3 | 27.3 % | 3.0 % |
| Thamnophis (North American Garter Snakes & Ribbon Snakes) | 16 | 5 | 31.3 % | 4.3 % |
| Lampropeltis (King Snakes & Milk Snakes) | 18 | 10 | 55.6 % | 4.9 % |
| Family Elapidae [terrestrial species] (Cobras. Mambas. etc.) |
Species | Endemic species |
Endemism (species) |
Species in % of all reptile species in USA |
| Micruroides (Western Coral Snake) | 1 | 0 | 0.0 % | 0.3 % |
| Micrurus (American Coral Snakes) | 2 | 1 | 50.0 % | 0.5 % |
| Family Elapidae [marine species] (Sea Snakes) |
Species | Endemic species |
Endemism (species) |
Species in % of all reptile species in USA |
| Hydrophis (Typical Sea Snakes) | 1 | 0 | 0.0 % | 0.3 % |
| Family Leptotyphlopidae (Thread Snakes) |
Species | Endemic species |
Endemism (species) |
Species in % of all reptile species in USA |
| Rena (Maroon Thread Snakes) | 4 | 0 | 0.0 % | 1.1 % |
| Family Viperidae (Vipers) |
Species | Endemic species |
Endemism (species) |
Species in % of all reptile species in USA |
| Sistrurus (Pygmy Rattlesnakes) | 3 | 1 | 33.3 % | 0.8 % |
| Agkistrodon (American Copperheads. Cottonmouths. and Cantils) | 4 | 3 | 75.0 % | 1.1 % |
| Crotalus (Typical Rattlesnakes) | 21 | 6 | 28.6 % | 5.7 % |
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| Turtles (Testudines) | ||||
| Family Cheloniidae (Hard-shelled Sea Turtles) |
Species | Endemic species |
Endemism (species) |
Species in % of all reptile species in USA |
| Caretta (Loggerhead Sea Turtle) | 1 | 0 | 0.0 % | 0.3 % |
| Chelonia (Green Sea Turtle) | 1 | 0 | 0.0 % | 0.3 % |
| Eretmochelys (Hawksbill Sea Turtle) | 1 | 0 | 0.0 % | 0.3 % |
| Lepidochelys (Ridley Sea Turtles) | 2 | 0 | 0.0 % | 0.5 % |
| Family Chelydridae (American Snapping Turtles) |
Species | Endemic species |
Endemism (species) |
Species in % of all reptile species in USA |
| Chelydra (American Snapping Turtles) | 1 | 0 | 0.0 % | 0.3 % |
| Macrochelys (Alligator Snapping Turtles) | 2 | 2 | 100.0 % | 0.5 % |
| Family Dermochelyidae (Leatherback Sea Turtle) |
Species | Endemic species |
Endemism (species) |
Species in % of all reptile species in USA |
| Dermochelys (Leatherback Sea Turtle) | 1 | 0 | 0.0 % | 0.3 % |
| Family Emydidae (Western Pond Turtles) |
Species | Endemic species |
Endemism (species) |
Species in % of all reptile species in USA |
| Chrysemys (American Painted Turtle) | 1 | 0 | 0.0 % | 0.3 % |
| Clemmys (American Spotted Turtle) | 1 | 0 | 0.0 % | 0.3 % |
| Deirochelys (Chicken Turtle) | 1 | 1 | 100.0 % | 0.3 % |
| Emydoidea (Blanding's Turtle) | 1 | 0 | 0.0 % | 0.3 % |
| Malaclemys (Diamondback Terrapin) | 1 | 1 | 100.0 % | 0.3 % |
| Actinemys (Pacific Pond Turtles) | 2 | 1 | 50.0 % | 0.5 % |
| Glyptemys (North American Wood Turtle & Bog Turtle) | 2 | 1 | 50.0 % | 0.5 % |
| Terrapene (American Box Turtles) | 2 | 1 | 50.0 % | 0.5 % |
| Trachemys (Slider Turtles) | 2 | 0 | 0.0 % | 0.5 % |
| Pseudemys (Cooter Turtles) | 7 | 6 | 85.7 % | 1.9 % |
| Graptemys (Map Turtles) | 13 | 12 | 92.3 % | 3.5 % |
| Family Kinosternidae (American Mud and Musk Turtles) |
Species | Endemic species |
Endemism (species) |
Species in % of all reptile species in USA |
| Sternotherus (North American Musk Turtles) | 6 | 5 | 83.3 % | 1.6 % |
| Kinosternon (American Mud Turtles) | 7 | 3 | 42.9 % | 1.9 % |
| Family Testudinidae (Tortoises) |
Species | Endemic species |
Endemism (species) |
Species in % of all reptile species in USA |
| Gopherus (Gopher Tortoises) | 4 | 2 | 50.0 % | 1.1 % |
| Family Trionychidae (Softshell Turtles) |
Species | Endemic species |
Endemism (species) |
Species in % of all reptile species in USA |
| Apalone (North American Softshell Turtles) | 3 | 2 | 66.7 % | 0.8 % |