#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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