#subclass_Archosauria__Archosauria a large subclass of diapsid reptiles including: crocodiles; alligators; dinosaurs; pterosaurs; plesiosaurs; ichthyosaurs; thecodonts
supertype: class__clas (biology) a taxonomic group containing one or more orders
member of: class_Reptilia
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
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