#class_Reptilia__Reptilia class of cold-blooded air-breathing vertebrates with completely ossified skeleton and a body usually covered with scales or horny plates; once the dominant land animals
supertype: class__clas (biology) a taxonomic group containing one or more orders
member of: subphylum_Vertebrata
member: reptile__reptilian any cold-blooded vertebrate of the class Reptilia including tortoises turtles snakes lizards alligators crocodiles and extinct forms
member: subclass_Anapsida__Anapsida oldest known reptiles: turtles; extinct Permian forms
member: anapsid_reptile__anapsid primitive reptile having no opening in the temporal region of the skull; all extinct except turtles
member: order_Chelonia__Chelonia__Testudinata__order_Testudinata__Testudines__order_Testudines tortoises and turtles
member: chelonian_reptile__chelonianreptile__chelonian a reptile of the order Chelonia
member: family_Cheloniidae__Cheloniidae__Chelonidae__family_Chelonidae green turtles; hawksbills
member: genus_Chelonia__Chelonia green turtles
member: green_turtle__greenturtle__Chelonia_mydas large tropical turtle with greenish flesh used for turtle soup
member: genus_Caretta__Caretta loggerhead turtles
member: loggerhead_turtle__loggerhead__Caretta_caretta very large carnivorous sea turtle; wide ranging in warm open seas
member: genus_Lepidochelys__Lepidochelys ridleys
member: ridley a marine turtle
member: genus_Eretmochelys__Eretmochelys hawksbills
member: hawksbill_turtle__hawksbillturtle__hawksbill__hawkbill__tortoiseshell_turtle__tortoiseshellturtle__Eretmochelys_imbricata pugnacious tropical sea turtle with a hawk-like beak; source of food and the best tortoiseshell
member: family_Dermochelyidae__Dermochelyidae sea turtles
member: genus_Dermochelys__Dermochelys type genus of the Dermochelyidae: leatherback turtles
member: leatherback_turtle__leatherbackturtle__leatherback__leatheryturtle__Dermochelys_coriacea wide ranging marine turtle with flexible leathery carapace; largest living turtle
member: family_Chelydridae__Chelydridae snapping turtles
member: snapping_turtle large aggressive freshwater turtle with powerful jaws
member: genus_Chelydra__Chelydra snapping turtles
member: common_snapping_turtle__snapper__chelydraserpentina large-headed turtle with powerful hooked jaws found in or near water; prone to bite
member: genus_Macroclemys__Macroclemys alligator snapping turtles
member: alligator_snapping_turtle__alligator_snapper__alligatorsnapper__Macroclemys_temmincki large species having three ridges on its back; found in southeastern United States
member: family_Kinosternidae__Kinosternidae mud turtles; musk turtles
member: genus_Kinosternon__Kinosternon type genus of the Kinosternidae
member: mud_turtle__mudturtle bottom-dwelling freshwater turtle inhabiting muddy rivers of North and Central America
member: genus_Sternotherus__Sternotherus musk turtles
member: musk_turtle__stinkpot small freshwater turtle having a strong musky odor
member: family_Emydidae__Emydidae box and water turtles
member: terrapin any of various edible North American web-footed turtles living in fresh or brackish water
member: genus_Malaclemys__Malaclemys American terrapins
member: diamondback_terrapin__diamondbackterrapin__Malaclemys_centrata of marshes along Atlantic and Gulf coasts of United States
member: genus_Pseudemys__Pseudemys sliders; red-bellied terrapin
member: red-bellied_terrapin__redbelliedterrapin__red-bellied_turtle__redbelliedturtle__redbelly__Pseudemys_rubriventris freshwater turtle of Chesapeake bay tributaries having red markings on the lower shell
member: yellow-bellied_terrapin__slider__Pseudemys_scripta freshwater turtle of United States and South America; frequently raised commercially; some young sold as pets
member: river_cooter__rivercooter__cooter__Pseudemys_concinna large river turtle of the southern United States and northern Mexico
member: genus_Terrapene__Terrapene box turtles
member: box_turtle__boxturtle__box_tortoise__boxtortoise chiefly terrestrial turtle of North America; shell can be closed tightly
member: genus_Chrysemys__Chrysemys painted turtles
member: painted_turtle__paintedturtle__painted_terrapin__paintedterrapin__painted_tortoise__paintedtortoise__chrysemyspicta freshwater turtles having bright yellow and red markings; common in the eastern United States
member: family_Testudinidae__Testudinidae land tortoises
member: tortoise usually herbivorous land turtles having clawed elephant-like limbs; worldwide in arid area except Australia and Antarctica
member: genus_Testudo__Testudo type genus of the Testudinidae
member: European_tortoise__Testudo_graeca small land tortoise of southern Europe
member: giant_tortoise__gianttortoise very large tortoises of the Galapagos and Seychelles islands
member: genus_Geochelone__Geochelone giant tortoises
member: giant_tortoise__gianttortoise very large tortoises of the Galapagos and Seychelles islands
member: genus_Gopherus__Gopherus gopher tortoises
member: gopher_tortoise__gopher_turtle__gopher__Gopherus_polypemus burrowing edible land tortoise of southeastern North America
member: desert_tortoise__Gopherus_agassizii burrowing tortoise of the arid western United States and northern Mexico; may be reclassified as a member of genus Xerobates
member: Texas_tortoise close relative to the desert tortoise; may be reclassified as a member of genus Xerobates
member: genus_Xerobates__Xerobates possible new genus for desert and Texas tortoises based on recent research
member: family_Trionychidae__Trionychidae soft-shelled turtles
member: soft-shelled_turtle__pancake_turtle__pancaketurtle voracious aquatic turtle with a flat flexible shell covered by a leathery skin; can inflict painful bites
member: genus_Trionyx__Trionyx type genus of the Trionychidae
member: spiny_softshell__spinysoftshell__Trionyx_spiniferus river turtle of western United States with a warty shell; prefers quiet water
member: smooth_softshell__Trionyx_muticus river turtle of Mississippi basin; prefers running water
member: subclass_Lepidosauria__Lepidosauria diapsid reptiles: lizards; snakes; tuataras
member: order_Rhynchocephalia__Rhynchocephalia tuataras; extinct forms from middle Triassic
member: genus_Sphenodon__Sphenodon coextensive with the order Rhynchocephalia: tuataras
member: tuatara__Sphenodon_punctatum only extant member of the order Rhynchocephalia of large spiny lizard-like diapsid reptiles of coastal islands off New Zealand
member: order_Squamata__Squamata diapsid reptiles: snakes and lizards
member: suborder_Sauria__Sauria__Lacertilia__suborder_Lacertilia true lizards; including chameleons and geckos
member: saurian any of various reptiles of the suborder Sauria which includes lizards; in former classifications included also the crocodiles and dinosaurs
member: family_Gekkonidae__Gekkonidae geckos
member: genus_Ptychozoon__Ptychozoon flying geckos
member: flying_gecko__fringed_gecko__fringedgecko__Ptychozoon_homalocephalum having membranous expansions along sides of body and limbs and tail
member: genus_Coleonyx__Coleonyx banded geckos
member: banded_gecko any of several geckos with dard bands across the body and differing from typical geckos in having movable eyelids; of United States southwest and gulf coast to Florida
member: family_Pygopodidae__Pygopodidae Australian and Tasmanian lizards
member: genus_Pygopus__Pygopus type genus of the Pygopodidae; snake-shaped pleurodont lizard with no forelimbs and only rudimentary hind limbs
member: family_Iguanidae__Iguanidae__Iguania__family_Iguania New World lizards
member: iguanid_lizard__iguanidlizard__iguanid lizards of the New World and Madagascar and some Pacific islands; typically having a long tail and bright throat patch in males
member: genus_Iguana type genus of the Iguanidae
member: common_iguana__iguana__Iguana_iguana large herbivorous tropical American arboreal lizards with a spiny crest along the back; used as human food in Central and South America
member: genus_Amblyrhynchus__Amblyrhynchus marine iguanas
member: marine_iguana__Amblyrhynchus_cristatus shore-dwelling seaweed-eating lizard of the Galapagos Islands
member: genus_Dipsosaurus__Dipsosaurus desert iguanas
member: desert_iguana__Dipsosaurus_dorsalis small long-tailed lizard of arid areas of southwestern United States and northwestern Mexico
member: genus_Sauromalus__Sauromalus chuckwallas
member: genus_Callisaurus__Callisaurus zebra-tailed lizard
member: zebra-tailed_lizard__gridiron-tailed_lizard__Callisaurus_draconoides swift lizard with long black-banded tail and long legs; of deserts of United States and Mexico
member: genus_Uma__Uma fringe-toed lizard
member: fringe-toed_lizard__Uma_notata with long pointed scales around toes; of deserts of United States and Mexico
member: genus_Holbrookia__Holbrookia earless lizards
member: earless_lizard__earlesslizard any of several slender lizards without external ear openings: of plains of western United States and Mexico
member: genus_Crotaphytus__Crotaphytus collard lizards
member: collared_lizard any of several robust long-tailed lizards with collars of two dark bands; of central and western United States and northern Mexico
member: genus_Gambelia__Gambelia leopard lizards
member: leopard_lizard__leopardlizard any of several large lizards with many dark spots; of western United States and northern Mexico
member: genus_Sceloporus__Sceloporus spiny lizards
member: spiny_lizard__spinylizard any of numerous lizards with overlapping ridged pointed scales; of North and Central America
member: genus_Uta__Uta a reptile genus of Iguanidae
member: side-blotched_lizard__sand_lizard__Uta_stansburiana one of the most abundant lizards in the arid western United States
member: genus_Urosaurus__Urosaurus a reptile genus of Iguanidae
member: tree_lizard__Urosaurus_ornatus a climbing lizard of western United States and northern Mexico
member: genus_Phrynosoma__Phrynosoma horned lizards
member: horned_lizard__horned_toad__horny_frog__hornyfrog insectivorous lizard with hornlike spines on the head and spiny scales on the body; of western North America
member: genus_Basiliscus__Basiliscus a reptile genus of Iguanidae
member: basilisk small crested arboreal lizard able to run on its hind legs; of tropical America
member: genus_Anolis__Anolis New World chameleons
member: American_chameleon__anole__Anolis_carolinensis small arboreal tropical American insectivorous lizards with the ability to change skin color
member: family_Amphisbaenidae__Amphisbaenidae worm lizards
member: family_Xantusiidae__Xantusiidae night lizards
member: night_lizard__nightlizard small secretive nocturnal lizard of southwestern North America and Cuba; bear live young
member: family_Scincidae__Scincidae skinks
member: genus_Scincus__Scincus type genus of Scincidae
member: genus_Scincella__Scincella a reptile genus of Scincidae
member: skink__scincid__scincidlizard alert agile lizard with reduced limbs and an elongated body covered with shiny scales; more dependent on moisture than most lizards; found in tropical regions worldwide
member: genus_Eumeces__Eumeces New World skinks
member: western_skink__westernskink__Eumeces_skiltonianus found in western North American grasslands and open woodlands
member: mountain_skink__Eumeces_callicephalus frequents oak and pine habitats in rocky mountainous areas of United States southwest and Mexico
member: family_Cordylidae__Cordylidae small family of spiny ovoviviparous African lizards
member: genus_Cordylus__Cordylus type genus of the Cordylidae; spiny lizards somewhat resembling tiny crocodiles
member: family_Teiidae__Teiidae whiptails; etc.
member: teiid_lizard__teiidlizard__teiid tropical New World lizard with a long tail and large rectangular scales on the belly and a long tail
member: genus_Cnemidophorus__Cnemidophorus whiptails
member: whiptail_lizard__whiptail any of numerous very agile and alert New World lizards
member: genus_Tupinambis__Tupinambis tejus
member: teju large (to 3 feet) blackish yellow-banded South American lizard; raid henhouses; used as food
member: family_Agamidae__Agamidae an Old World reptile family of Sauria
member: agamid_lizard__agamid a lizard of the family Agamidae
member: genus_Agama type genus of the Agamidae
member: agama small terrestrial lizard of warm regions of the Old World
member: genus_Chlamydosaurus__Chlamydosaurus frilled lizards
member: frilled_lizard__frilledlizard__Chlamydosaurus_kingi large arboreal insectivorous Australian lizard with a ruff of skin around the neck
member: genus_Draco__Draco flying dagons
member: flying_dragon__dragon__flying_lizard any of several small tropical Asian lizards capable of gliding by spreading winglike membranes on each side of the body
member: genus_Moloch genus of Australian desert lizard
member: moloch any lizard of the genus Moloch
member: mountain_devil__spiny_lizard__spinylizard__molochhorridu desert lizard that feeds on ants
member: family_Anguidae__Anguidae alligator lizards
member: anguid_lizard any of a small family of lizards widely distributed in warm areas; all are harmless and useful as destroyers of e.g. slugs and insects
member: genus_Gerrhonotus__Gerrhonotus alligator lizards
member: alligator_lizard__alligatorlizard slim short-limbed lizard having a distinctive fold on each side that permits expansion; of western North America
member: genus_Anguis__Anguis type genus of the Anguidae: blindworms
member: blindworm__slowworm__Anguis_fragilis small burrowing legless European lizard with tiny eyes; popularly believed to be blind
member: genus_Ophisaurus__Ophisaurus glass lizards
member: glass_lizard__glasslizard__glass_snake__glasssnake__joint_snake__jointsnake snakelike lizard of Europe Asia and North America with vestigial hind limbs and the ability to regenerate its long fragile tail
member: family_Xenosauridae__Xenosauridae monotypic family of Mexican lizards
member: genus_Xenosaurus__Xenosaurus type and sole genus of Xenosauridae: slender-bodied Mexican lizards having the upper surface covered with tiny granules and tubercles
member: family_Anniellidae__Anniellidae legless lizards
member: legless_lizard__leglesslizard degenerate wormlike burrowing lizard of California closely related to alligator lizards
member: family_Lanthanotidae__Lanthanotidae stout-bodied lizards
member: genus_Lanthanotus__Lanthanotus 1 species
member: Lanthanotus_borneensis a stout-bodied pleurodont lizard of Borneo
member: family_Helodermatidae__Helodermatidae only known venomous lizards
member: venomous_lizard any of two or three large heavy-bodied lizards; only known venomous lizards
member: genus_Heloderma__Heloderma type genus of the Helodermatidae; American venomous lizards
member: Gila_monster__Heloderma_suspectum large orange and black lizard of southwestern United States; not dangerous unless molested
member: Mexican_beaded_lizard__beaded_lizard__Heloderma_horridum lizard with black and yellowish beadlike scales; of western Mexico
member: family_Lacertidae__Lacertidae Old World lizards
member: lacertid_lizard__lacertid Old World terrestrial lizard
member: genus_Lacerta__Lacerta type genus of the Lacertidae
member: sand_lizard__Lacerta_agilis a common and widely distributed lizard of Europe and central Asia
member: green_lizard__greenlizard__lacertaviridi a common Eurasian lizard about a foot long
member: family_Chamaeleontidae__Chamaeleontidae__Chamaeleonidae__family_Chamaeleonidae__Rhiptoglossa__family_Rhiptoglossa Old World chameleons; in some classifications Rhiptoglossa is considered a superfamily of Sauria
member: chameleon__chamaeleon lizard of Africa and Madagascar able to change skin color and having a projectile tongue
member: genus_Chamaeleo__Chamaeleo__genus_Chamaeleon type genus of the Chamaeleontidae
member: African_chameleon__Chamaeleo_chamaeleon a chameleon found in Africa
member: horned_chameleon__Chamaeleo_oweni a kind of chameleon
member: family_Varanidae__Varanidae monitor lizards
member: genus_Varanus__Varanus type and sole extant genus of the Varanidae
member: monitor_lizard__monitorlizard__monitor__varan any of various large tropical carnivorous lizards of Africa Asia and Australia; fabled to warn of crocodiles
member: suborder_Serpentes__Serpentes__Ophidia__suborder_Ophidia snakes
member: ophidian__snake__serpent limbless scaly elongate reptile; some are venomous
member: family_Colubridae__Colubridae nonvenomous snakes; about two-thirds of all living species
member: colubrid_snake__colubrid mostly harmless temperate-to-tropical terrestrial or arboreal or aquatic snakes
member: genus_Carphophis__Carphophis thunder snake
member: thunder_snake__thundersnake__worm_snake__Carphophis_amoenus small reddish wormlike snake of eastern United States
member: genus_Diadophis__Diadophis a genus of reptiles of the family Colubridae including ringneck snakes
member: ringneck_snake__ring-necked_snake__ring_snake any of numerous small nonvenomous North American snakes with a yellow or orange ring around the neck
member: genus_Heterodon__Heterodon a genus of small colubrid snakes containing the North American hognose snakes
member: hognose_snake__hognosesnake__puff_adder__sand_viper harmless North American snake with upturned nose; may spread its head and neck or play dead when disturbed
member: genus_Phyllorhynchus__Phyllorhynchus leaf-nosed snakes
member: leaf-nosed_snake any of various pale blotched snakes with a blunt snout of southwestern North America
member: genus_Opheodrys__Opheodrys North American green snakes
member: grass_snake__grasssnake__green_snake__greensnake either of two N. American chiefly insectivorous green snakes
member: genus_Chlorophis__Chlorophis African green snakes
member: green_snake__greensnake any of numerous African green snakes
member: genus_Coluber__Coluber racers
member: racer slender fast-moving North American snakes
member: horseshoe_whipsnake__Coluber_hippocrepis slender fast-moving Eurasian snake
member: genus_Masticophis__Masticophis whipsnakes
member: whipsnake__whip_snake any of several fast-moving North American snakes with long whiplike tails
member: genus_Elaphe__Elaphe North American rat snakes
member: corn_snake__red_rat_snake__redratsnake__Elaphe_guttata large harmless snake of southeastern United States; often on farms
member: black_rat_snake__blackratsnake__blacksnake__pilot_blacksnake__pilotblacksnake__mountain_blacksnake__Elaphe_obsoleta large harmless shiny black North American snake
member: chicken_snake__chickensnake large North American snake
member: genus_Ptyas__Ptyas Asian rat snakes
member: Indian_rat_snake__Ptyas_mucosus enter buildings in pursuit of prey
member: genus_Arizona__Arizona glossy snake
member: glossy_snake__Arizona_elegans nocturnal burrowing snake of western United States with shiny tan scales
member: genus_Pituophis__Pituophis bull snakes
member: bull_snake any of several large harmless rodent-eating North American burrowing snakes
member: genus_Lampropeltis__Lampropeltis king snakes and milk snakes
member: king_snake any of numerous nonvenomous North American constrictors; feed on other snakes and small mammals
member: genus_Thamnophis__Thamnophis garter snakes
member: garter_snake__grass_snake__grasssnake any of numerous nonvenomous longitudinally-striped viviparous North and Central American snakes
member: genus_Tropidoclonion__Tropidoclonion lined snakes
member: lined_snake__Tropidoclonion_lineatum secretive snake of city dumps and parks as well as prairies and open woods; feeds on earthworms; of central United States
member: genus_Sonora__Sonora ground snakes
member: ground_snake__Sonora_semiannulata small shy brightly-ringed terrestrial snake of arid or semiarid areas of western North America
member: genus_Potamophis__Potamophis ground snakes
member: eastern_ground_snake__Potamophis_striatula__Haldea_striatula in some classifications placed in genus Haldea; small reddish-gray snake of eastern North America
member: genus_Haldea__Haldea ground snakes
member: genus_Natrix__Natrix water snakes; a cosmopolitan genus
member: common_water_snake__banded_water_snake__Natrix_sipedon__Nerodia_sipedon in some classifications placed in the genus Nerodia; western United States snake that seldom ventures far from water
member: water_moccasin__watermoccasin any of numerous North American water snakes inhabiting fresh waters
member: genus_Nerodia__Nerodia North American water snakes
member: genus_Storeria__Storeria a genus of Colubridae
member: red-bellied_snake__redbelliedsnake__Storeria_occipitamaculata harmless woodland snake of southeastern United States
member: genus_Chilomeniscus__Chilomeniscus sand snakes
member: sand_snake small North American burrowing snake
member: genus_Tantilla__Tantilla black-headed snakes
member: black-headed_snake small secretive ground-dwelling snake; found from central United States to Argentina
member: genus_Oxybelis__Oxybelis vine snakes
member: vine_snake slender arboreal snake found from southern Arizona to Bolivia
member: genus_Trimorphodon__Trimorphodon lyre snakes
member: lyre_snake mildly venomous snake with a lyre-shaped mark on the head; found in rocky areas from southwestern United States to Central America
member: genus_Hypsiglena__Hypsiglena night snakes
member: night_snake__Hypsiglena_torquata nocturnal prowler of western United States and Mexico
member: genus_Drymarchon__Drymarchon a genus of Colubridae
member: family_Typhlopidae__Typhlopidae blind snakes
member: family_Leptotyphlopidae__Leptotyphlopidae blind snakes
member: blind_snake__blindsnake__worm_snake wormlike burrowing snake of warm regions having vestigial eyes
member: genus_Leptotyphlops__Leptotyphlops blind snakes of Asia and Africa and Americas
member: western_blind_snake__westernblindsnake__Leptotyphlops_humilis burrows among roots of shrubs and beneath rocks in desert and rocky hillside areas and beach sand of western United States
member: family_Boidae__Boidae boas and pythons
member: boa any of several chiefly tropical constrictors with vestigial hind limbs
member: genus_Charina__Charina boas of western North America
member: rubber_boa__tow-headed_snake__Charina_bottae boa of grasslands and woodlands of western North America; looks and feels like rubber with tail and head of similar shape
member: genus_Lichanura__Lichanura boas of western North America
member: rosy_boa__Lichanura_trivirgata boa of rocky desert of southwestern United States
member: genus_Eunectes__Eunectes anacondas
member: anaconda__Eunectes_murinus large arboreal boa of tropical South America
member: subfamily_Pythoninae__Pythoninae Old World boas: pythons; in some classifications considered a separate family from Boidae
member: python large Old World boas
member: genus_Python Old World boas
member: reticulated_python__reticulatedpython__Python_reticulatus of southeast Asia and East Indies; the largest snake in the world
member: Indian_python__Python_molurus very large python of southeast Asia
member: rock_python__rock_snake__Python_sebae very large python of tropical and southern Africa
member: family_Elapidae__Elapidae cobras; kraits; mambas; coral snakes; Australian taipan and tiger snakes
member: elapid_snake__elapid any of numerous venomous fanged snakes of warmer parts of both hemispheres
member: genus_Micrurus__Micrurus coral snakes
member: eastern_coral_snake__easterncoralsnake__Micrurus_fulvius ranges from Central America to southeastern United States
member: genus_Micruroides__Micruroides coral snakes
member: western_coral_snake__westerncoralsnake__Micruroides_euryxanthus ranges from Central America to southwestern United States
member: genus_Calliophis__Calliophis__Callophis__genus_Callophis Asian coral snakes
member: Asian_coral_snake of India
member: genus_Aspidelaps__Aspidelaps African coral snakes
member: African_coral_snake__Aspidelaps_lubricus small widely distributed arboreal snake of southern Africa banded in black and orange
member: genus_Rhynchoelaps__Rhynchoelaps Australian coral snakes
member: Australian_coral_snake__Rhynchoelaps_australis small venomous but harmless snake marked with black-and-white on red
member: genus_Denisonia__Denisonia copperheads
member: Denisonia_superba__copperhead venomous but sluggish reddish-brown snake of Australia
member: genus_Naja__Naja cobras
member: Indian_cobra__Naja_naja of tropical Africa and Asia
member: asp__Egyptian_cobra__Naja_haje cobra used by the Pharaohs as a symbol of their power over life and death
member: black-necked_cobra__spitting_cobra__Naja_nigricollis aggressive cobra widely distributed in Africa; rarely bites but spits venom that may cause blindness
member: genus_Ophiophagus__Ophiophagus king cobra
member: king_cobra__hamadryad__Ophiophagus_hannan__Naja_hannah large cobra of southeastern Asia and the East Indies; the largest venomous snake; sometimes placed in genus Naja
member: genus_Hemachatus__Hemachatus ringhals
member: genus_Dendroaspis__Dendroaspis__Dendraspis__genus_Dendraspis mambas
member: mamba arboreal snake of central and southern Africa whose bite is often fatal
member: genus_Acanthophis__Acanthophis Australian elapid snakes
member: death_adder__Acanthophis_antarcticus venomous Australian snake resembling an adder
member: genus_Notechis__Notechis tiger snakes
member: tiger_snake__Notechis_scutatus highly venomous brown-and-yellow snake of Australia and Tasmania
member: genus_Pseudechis__Pseudechis venomous Australian blacksnakes
member: Australian_blacksnake__Pseudechis_porphyriacus large semiaquatic snake of Australia; black above with red belly
member: genus_Bungarus__Bungarus kraits
member: krait brightly colored venomous but nonaggressive snake of southeastern Asia and Malay peninsula
member: genus_Oxyuranus__Oxyuranus taipans
member: taipan__Oxyuranus_scutellatus large highly venomous snake of northeastern Australia
member: family_Hydrophidae__Hydrophidae sea snakes
member: sea_snake__seasnake any of numerous venomous aquatic viviparous snakes having a fin-like tail; of warm littoral seas; feed on fish which they immobilize with quick-acting venom
member: family_Viperidae__Viperidae Old World vipers
member: viper venomous Old World snakes characterized by hollow venom-conducting fangs in the upper jaw
member: genus_Vipera__Vipera type genus of the Viperidae
member: common_viper__adder__Vipera_berus small terrestrial viper common in northern Eurasia
member: asp_viper__aspviper__asp__Vipera_aspis of southern Europe; similar to but smaller than the adder
member: genus_Bitis__Bitis a genus of Viperidae
member: puff_adder__Bitis_arietans large African viper that inflates its body when alarmed
member: gaboon_viper__Bitis_gabonica large heavy-bodied brilliantly marked and extremely venomous west African viper
member: genus_Cerastes__Aspis__genus_Aspis horned vipers
member: horned_viper__cerastes__sand_viper__horned_asp__Cerastes_cornutus highly venomous viper of North Africa and southwest Asia having a horny spine above each eye
member: family_Crotalidae__Crotalidae New World vipers: pit vipers
member: pit_viper__pitviper New World vipers with hollow fangs and a heat-sensitive pit on each side of the head
member: genus_Agkistrodon__Agkistrodon__Ancistrodon__genus_Ancistrodon copperheads
member: copperhead__Agkistrodon_contortrix common coppery brown pit viper of upland eastern United States
member: cottonmouth__water_moccasin__watermoccasin__cottonmouth_moccasin__cottonmouthmoccasin__agkistrodonpiscivoru venomous semiaquatic snake of swamps in southern United States
member: rattlesnake pit viper with horny segments at the end of the tail that rattle when shaken
member: genus_Crotalus__Crotalus large rattlesnakes; seldom bite unless startled or pursuing prey
member: timber_rattlesnake__banded_rattlesnake__Crotalus_horridus_horridus widely distributed in rugged ground of eastern United States
member: prairie_rattlesnake__prairie_rattler__Western_rattlesnake__Crotalus_viridis widely distributed between the Mississippi and the Rockies
member: horned_rattlesnake__sidewinder__Crotalus_cerastes small pale-colored desert rattlesnake of southwestern United States; body moves in an S-shaped curve
member: Western_diamondback_rattlesnake__Western_diamondback__Crotalus_atrox largest and most dangerous North American snake; of southwestern United States and Mexico
member: rock_rattlesnake__Crotalus_lepidus mountain rock dweller of Mexico and most southern parts of United States southwest
member: tiger_rattlesnake__tigerrattlesnake__Crotalus_tigris having irregularly cross-banded back; of arid foothills and canyons of southern Arizona and Mexico
member: Mojave_rattlesnake__Crotalus_scutulatus extremely dangerous; most common in areas of scattered scrubby growth; from Mojave Desert to w. Texas and into Mexico
member: speckled_rattlesnake__Crotalus_mitchellii markings vary but usually harmonize with background; of sw Arizona and Baja California
member: genus_Sistrurus__Sistrurus pygmy rattlesnakes
member: massasauga_rattler__massasauga__Sistrurus_catenatus pygmy rattlesnake found in moist areas from the Great Lakes to Mexico; feeds on mice and small amphibians
member: genus_Bothrops__Bothrops fer-de-lance
member: fer-de-lance__Bothrops_atrops large extremely venomous pit viper of Central and South America
member: subclass_Archosauria__Archosauria a large subclass of diapsid reptiles including: crocodiles; alligators; dinosaurs; pterosaurs; plesiosaurs; ichthyosaurs; thecodonts
member: archosaur__archosaurian__archosaurian_reptile extinct reptiles including: dinosaurs; plesiosaurs; pterosaurs; ichthyosaurs; thecodonts
member: genus_Saurosuchus__Saurosuchus early archosaurian carnivore
member: genus_Proterochampsa__Proterochampsa early archosaurian carnivore
member: order_Crocodylia__Crocodylia__Crocodilia__order_Crocodilia crocodiles; alligators; caimans; gavials
member: crocodilian_reptile__crocodilianreptile__crocodilian extant archosaurian reptile
member: family_Crocodylidae__Crocodylidae true crocodiles
member: genus_Crocodylus__Crocodylus__Crocodilus__genus_Crocodilus type genus of the Crocodylidae
member: crocodile large voracious aquatic reptile having a long snout with massive jaws and a body covered with bony plates; of sluggish tropical waters
member: genus_Tomistoma__Tomistoma a genus of Malayan crocodiles
member: false_gavial__falsegavial__tomistomaschlegeli crocodile of southeast Asia similar to but smaller than the gavial
member: family_Alligatoridae__Alligatoridae alligators; caimans
member: genus_Alligator type genus of the Alligatoridae
member: alligator either of two amphibious reptiles with shorter broader snouts than crocodiles
member: genus_Caiman caimans
member: cayman__caiman alligator-like reptile of Central and South America having a more heavily armored belly
member: family_Gavialidae__Gavialidae gavials
member: genus_Gavialis__Gavialis type genus of the Gavialidae
member: gavial__Gavialis_gangeticus large fish-eating Indian crocodilian with a long slender snout
member: order_Ornithischia__Ornithischia extinct terrestrial reptiles having birdlike pelvises: armored dinosaurs (thyreophorans); bone-headed and horned dinosaurs (marginocephalians); duck-billed dinosaurs (euronithopods)
member: ornithischian_dinosaur__ornithischiandinosaur__ornithischian herbivorous dinosaur with a pelvis like that of a bird
member: genus_Pisanosaurus primitive ornithischian dinosaur found in Argentina; early Triassic
member: pisanosaur__pisanosaurus primitive dinosaur found in Argentina
member: genus_Staurikosaurus primitive ornithischian dinosaur found in Brazil
member: staurikosaur__staurikosaurus primitive dinosaur found in Brazil
member: suborder_Thyreophora__Thyreophora__thyreophoran armored dinosaurs: stegosaurs and ankylosaurs
member: armored_dinosaur__armoreddinosaur dinosaurs having bony armour
member: genus_Stegosaurus quadrupedal armored herbivore of the Jurassic and Cretaceous
member: stegosaur__stegosaurus__stegosauru__Stegosaur_stenops herbivorous ornithischian dinosaur with a row of bony plates along its back and a spiked tail probably used as a weapon
member: genus_Ankylosaurus armored herbivorous dinosaurs of the Cretaceous
member: ankylosaur__ankylosaurus having the back covered with thick bony plates; thought to have walked with a sprawling gait resembling a lizard's
member: Edmontonia heavily armored and highly spiked dinosaur with semi-upright posture
member: suborder_Marginocephalia__Marginocephalia__marginocephalian includes bone-headed (pachycephalosaurs) and horned (ceratopsian) dinosaurs
member: suborder_Pachycephalosaurus bone-headed dinosaurs; late Cretaceous
member: bone-headed_dinosaur bipedal herbivorous dinosaurs with bony crowns
member: suborder_Ceratopsia__Ceratopsia horned dinosaurs
member: ceratopsian__horned_dinosaur any of several four-footed herbivorous horned dinosaurs with enormous beaked skulls; of the late Cretaceous in North America and Mongolia
member: family_Ceratopsidae__familyceratopsidae__Ceratopsidae American ceratopsian dinosaurs
member: genus_Protoceratops small horned dinosaurs
member: genus_Triceratops genus of herbivorous horned dinosaurs
member: triceratops__triceratop huge ceratopsian dinosaur having three horns and the neck heavily armored with a very solid frill
member: genus_Styracosaurus genus of horned dinosaurs
member: styracosaur__styracosaurus__styracosauru an unusual ceratopsian dinosaur having many large spikes around the edge of its bony frill and a long nose horn; late Cretaceous
member: genus_Psittacosaurus most primitive genus of horned dinosaurs; early Cretaceous
member: psittacosaur__psittacosaurus primitive dinosaur actually lacking horns and having only the beginning of a frill; long hind and short front limbs; may have been bipedal
member: suborder_Euronithopoda__Euronithopoda__euronithopod__Ornithopoda__suborder_Ornithopoda widespread group including duck-billed dinosaurs and their early relatives (hadrosaurs; trachodon; iguanodon)
member: ornithopod_dinosaur__ornithopod bipedal herbivorous dinosaur
member: family_Hadrosauridae__Hadrosauridae duck-billed dinosaurs; upper Cretaceous
member: hadrosaur__hadrosaurus__hadrosauru__duck-billed_dinosaur any of numerous large bipedal ornithischian dinosaurs having a horny duck-like bill and webbed feet; may have been partly aquatic
member: genus_Anatotitan genus of large duck-billed dinosaurs; late Cretaceous
member: anatotitan one of the largest and most famous duck-billed dinosaurs
member: genus_Corythosaurus genus of duck-billed dinosaurs of late Cretaceous
member: corythosaur__corythosaurus__corythosauru duck-billed dinosaur with nasal passages that expand into a crest like a hollow helmet
member: genus_Edmontosaurus duck-billed dinosaurs of Canada
member: edmontosaurus__edmontosauru duck-billed dinosaur from Canada found as a fossilized mummy with skin
member: genus_Trachodon a reptile genus of the suborder Euronithopoda
member: trachodon__trachodont large duck-billed dinosaur of the Upper Cretaceous
member: family_Iguanodontidae__Iguanodontidae iguanodons
member: genus_Iguanodon type genus of the Iguanodontidae
member: iguanodon massive herbivorous bipedal dinosaur with a long heavy tail; common in Europe and North Africa; early Cretaceous
member: order_Saurischia__Saurischia extinct terrestrial reptiles: theropods (carnivorous); sauropods (herbivorous)
member: saurischian_dinosaur__saurischiandinosaur__saurischian herbivorous or carnivorous dinosaur having a three-pronged pelvis like that of a crocodile
member: suborder_Sauropodomorpha__Sauropodomorpha gigantic herbivorous dinosaurs having huge bodies with long necks and small heads: Prosauropoda and Sauropoda (apatosaurus; diplodocus; titanosaurs)
member: suborder_Prosauropoda__Prosauropoda the earliest known dinosaurs
member: suborder_Sauropoda__Sauropoda any of the sauropod dinosaurs
member: sauropod_dinosaur__sauropod very large herbivorous dinosaur of the Jurassic and Cretaceous having a small head a long neck and tail and five-toed limbs; largest known land animal
member: genus_Apatosaurus__genus_Brontosaurus large quadrupedal herbivorous dinosaurs with very long neck and tail; late Jurassic
member: apatosaur__apatosaurus__brontosaur__brontosaurus__thunder_lizard__thunderlizard__Apatosaurus_excelsus huge quadrupedal herbivorous dinosaur common in N. America in the late Jurassic
member: genus_Barosaurus huge quadrupedal herbivorous dinosaur; late Jurassic
member: barosaur__barosaurus 5-story-tall dinosaur
member: genus_Diplodocus a reptile genus of the suborder Sauropoda
member: diplodocus huge quadrupedal herbivore with long neck and tail; of late Jurassic in western N. America
member: family_Titanosauridae__Titanosauridae herbivorous dinosaurs of the Cretaceous
member: genus_Titanosaurus__Titanosaurus genus of herbivorous dinosaurs flourishing during the Cretaceous in South America
member: titanosaur__titanosaurian amphibious quadrupedal herbivorous dinosaur with a long thin neck and whiplike tail; of the Cretaceous mostly in the southern hemisphere
member: genus_Argentinosaurus enormous dinosaur of the middle Cretaceous found in Argentina
member: argentinosaur huge herbivorous dinosaur of Cretaceous found in Argentina
member: genus_Seismosaurus__Seismosaurus genus of large herbivorous dinosaurs of Cretaceous found in western North America
member: ground-shaker__seismosaur huge herbivorous dinosaur of the Cretaceous found in western North America
member: suborder_Theropoda__Theropoda carnivorous saurischian dinosaurs with short forelimbs; Jurassic and Cretaceous
member: theropod_dinosaur__theropod__bird-footed_dinosaur any of numerous carnivorous dinosaurs of the Triassic to Cretaceous with short forelimbs that walked or ran on strong hind legs
member: suborder_Ceratosaura primitive saurischian dinosaurs
member: genus_Ceratosaurus primitive saurischian carnivorous dinosaurs
member: coelophysis__coelophysi one of the oldest known dinosaurs; late Triassic; cannibalistic
member: ceratosaur__ceratosaurus primitive medium-sized theropod; swift-running bipedal carnivorous dinosaur having grasping hands with sharp claws and a short horn between the nostrils; Jurassic in North America
member: genus_Coelophysis late Triassic carnivorous saurischian dinosaurs
member: suborder_Carnosaura__Carnosaura largest carnivorous land animals ever known
member: carnosaur large carnivorous bipedal dinosaur having huge claws
member: genus_Tyrannosaurus includes a single species
member: tyrannosaur__tyrannosauru__Tyrannosaurus_rex large carnivorous bipedal dinosaur having enormous teeth with knifelike serrations; may have been a scavenger rather than an active predator; Upper Cretaceous; North America
member: genus_Allosaurus__genus_Antrodemus carnivorous dinosaur of North America; late Jurassic
member: allosaur__allosaurus late Jurassic carnivorous dinosaur; similar to but somewhat smaller than tyrannosaurus
member: genus_Compsognathus a reptile genus of Theropoda
member: compsognathus__compsognathu very small bipedal carnivorous dinosaur of the late Jurassic in Bavaria
member: genus_Herrerasaurus primitive theropod found in Argentina; early Triassic
member: herrerasaur__herrerasaurus__herrerasauru a kind of theropod dinosaur found in Argentina
member: genus_Eoraptor primitive theropod found in Argentina; early Triassic
member: eoraptor a theropod dinosaur of the genus Eoraptor
member: family_Megalosauridae__Megalosauridae megalosaurs
member: genus_Megalosaurus type genus of the Megalosauridae
member: megalosaur__megalosaurus gigantic carnivorous bipedal dinosaur of the Jurassic or early Cretaceous in Europe
member: suborder_Ornithomimida__Ornithomimida lightly built medium-size theropods
member: ornithomimid lightly built medium-sized dinosaur having extremely long limbs and necks with small heads and big brains and large eyes
member: genus_Struthiomimus small toothless saurischian dinosaurs; upper Cretaceous of Canada
member: struthiomimus__struthiomimu small light-boned toothless dinosaur resembling an ostrich in size and proportions
member: genus_Deinocheirus a reptile genus of Ornithomimida
member: deinocheirus lightly built medium-sized theropod with long limbs and neck
member: suborder_Maniraptora__Maniraptora advanced theropods including oviraptorids and dromaeosaurs and possibly even modern birds
member: maniraptor advanced carnivorous theropod
member: oviraptorid advanced carnivorous theropod
member: genus_Velociraptor advanced carnivorous theropod
member: velociraptor small active carnivore that probably fed on protoceratops; possibly related more closely to birds than to other dinosaurs
member: family_Dromaeosauridae__Dromaeosauridae swift-running bipedal dinosaurs
member: dromaeosaur a kind of maniraptor
member: genus_Deinonychus advanced bipedal carnivorous dinosaur
member: deinonychus__deinonychu swift agile wolf-sized bipedal dinosaur having a large curved claw on each hind foot; of the Cretaceous
member: genus_Utahraptor advanced bipedal carnivorous dinosaur
member: utahraptor__superslasher large (20-ft) and swift carnivorous dinosaur having an upright 15-in slashing claw on each hind foot; early Cretaceous
member: genus_Mononychus authorities disagree over whether to classify the genus as bird or dinosaur
member: Mononychus_olecranus 75-million-year-old turkey-sized long-legged fossil found in the Gobi Desert of Mongolia having birdlike fused wrist bones and keeled breastbone and a long tail resembling a dinosaur's; short 3-inch-long forelimbs end in a single claw instead of wings; classification as bird or dinosaur is in dispute
member: order_Pterosauria__Pterosauria extinct flying reptiles: pterosaurs
member: pterosaur__flying_reptile extinct flying reptile of the Jurassic and Cretaceous having a birdlike beak and membranous wings supported by the very long fourth digit of each forelimb
member: family_Pterodactylidae__Pterodactylidae a reptile family in the order Pterosauria
member: genus_Pterodactylus__Pterodactylus a reptile genus of Pterodactylidae
member: pterodactyl extinct flying reptile
member: order_Thecodontia__Thecodontia extinct terrestrial reptiles having teeth set in sockets; of the late Permian to Triassic
member: thecodont_reptile__thecodontreptile__thecodont presumably in the common ancestral line to dinosaurs and crocodiles and birds
member: order_Ichthyosauria__Ichthyosauria extinct marine reptiles: ichthyosaurs
member: ichthyosaur any of several marine reptiles of the Mesozoic having a body like a porpoise with dorsal and tail fins and paddle-shaped limbs
member: family_Ichthyosauridae__Ichthyosauridae later ichthyosaurs of the Jurassic and Cretaceous; widely distributed in both hemispheres
member: genus_Ichthyosaurus type genus of the Ichthyosauridae
member: ichthyosaurus__ichthyosauru ichthyosaurs of the Jurassic
member: genus_Stenopterygius a reptile genus of Ichthyosauridae
member: stenopterygius__Stenopterygius_quadrisicissus an ichthyosaur of the genus Stenopterygius
member: order_Sauropterygia__Sauropterygia extinct marine reptiles: plesiosaurs; nothosaurs
member: suborder_Plesiosauria__Plesiosauria any of the plesiosaurs
member: genus_Plesiosaurus a reptile genus of suborder Plesiosauria
member: plesiosaur__plesiosaurus extinct marine reptile with a small head on a long neck a short tail and four paddle-shaped limbs; of the Jurassic and Cretaceous
member: suborder_Nothosauria__Nothosauria a suborder of Sauropterygia
member: genus_Nothosaurus a genus of Nothosauria
member: nothosaur extinct marine reptile with longer more slender limbs than plesiosaurs and less completely modified for swimming
member: subclass_Synapsida__Synapsida extinct reptiles of the Permian to Jurassic considered ancestral to mammals
member: order_Therapsida__Therapsida extinct mammal-like reptiles found inhabiting all continents from the mid Permian to late Triassic
member: therapsid__protomammal probably warm-blooded; considered direct ancestor of mammals
member: genus_Chronoperates__Chronoperates a reptile genus of Therapsida
member: Chronoperates_paradoxus shrew-sized protomammal from the Alberta Canada region; of about 55 million years ago (much more recent than other mammal-like reptiles)
member: division_Cynodontia__Cynodontia a division of Triassic Therapsida comprising small carnivorous tetrapod reptiles often with mammal-like teeth
member: cynodont small carnivorous reptiles
member: genus_Exaeretodon__Exaeretodon a genus of reptiles of the division Cynodontia
member: division_Dicynodontia__Dicynodontia a division of Therapsida
member: dicynodont a kind of therapsid
member: genus_Ischigualastia__Ischigualastia early reptile found in Argentina
member: order_Ictodosauria__Ictodosauria extinct reptiles of the Upper Triassic
member: ictodosaur intermediate in form between the therapsids and most primitive true mammals
member: order_Pelycosauria__Pelycosauria edaphosaurus; dimetrodon
member: pelycosaur large primitive reptile having a tall spinal sail; of the Permian or late Paleozoic in Europe and North America
member: family_Edaphosauridae__Edaphosauridae a family of reptiles of the order Pelycosauria
member: genus_Edaphosaurus type genus of the Edaphosauridae
member: edaphosaurus heavy-bodied reptile with a dorsal sail or crest; of the late Paleozoic
member: genus_Dimetrodon a reptile genus of Pelycosauria
member: dimetrodon carnivorous dinosaur of the Permian in North America having a crest or dorsal sail
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