archosaur


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Related to archosaur: Lepidosaur

ar·cho·saur

 (är′kə-sôr′)
n.
Any of various vertebrates of the group Archosauria, having a single opening in each side of the skull in front of the eye socket, and including the dinosaurs, birds, pterosaurs, and modern crocodilians.

[New Latin Archosauria, subclass name : Greek arkhos, ruler + Greek sauros, lizard.]

ar′cho·saur′i·an n. & adj.

archosaur

(ˈɑːkəˌsɔː)
n
(Animals) any of a group of reptiles consisting of dinosaurs, pterosaurs, modern birds, modern crocodiles and extinct relatives of crocodiles, all having a diapsid skull

ar•cho•saur

(ˈɑr kəˌsɔr)

n.
any reptile of the subclass Archosauria, including the dinosaurs, pterosaurs, and crocodilians.
[1965–70; < New Latin Archosaurus < Greek árcho(s) leader, ruler + saûr(os) -saur]

ar·cho·saur

(är′kə-sôr′)
Any of a mostly extinct group of reptiles which includes the dinosaurs, pterosaurs, and the modern crocodiles and other crocodilians.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.archosaur - extinct reptiles including: dinosaursarchosaur - extinct reptiles including: dinosaurs; plesiosaurs; pterosaurs; ichthyosaurs; thecodonts
diapsid, diapsid reptile - reptile having a pair of openings in the skull behind each eye
Archosauria, subclass Archosauria - a large subclass of diapsid reptiles including: crocodiles; alligators; dinosaurs; pterosaurs; plesiosaurs; ichthyosaurs; thecodonts
dinosaur - any of numerous extinct terrestrial reptiles of the Mesozoic era
flying reptile, pterosaur - an extinct reptile of the Jurassic and Cretaceous having a bird-like beak and membranous wings supported by the very long fourth digit of each forelimb
thecodont, thecodont reptile - presumably in the common ancestral line to dinosaurs and crocodiles and birds
ichthyosaur - any of several marine reptiles of the Mesozoic having a body like a porpoise with dorsal and tail fins and paddle-shaped limbs
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
nothosaur - extinct marine reptile with longer more slender limbs than plesiosaurs and less completely modified for swimming
References in periodicals archive ?
The crocodile fossil, which is about 95 million years old, was uncovered in Arlington, at a place called the Arlington Archosaur Site where paleontologists and volunteers have been searching for fossils amidst new residential development.
Teleocrater is the oldest-known member of the dinosaur-pterosaur-bird archosaur branch.
1988): Archosaur phylogeny and the relationships of the Crocodylia.
They also suspect that this is the mechanism that the archosaur ancestors of modern crocodilians and birds used to pinpoint sounds.
A significant number of lungfish dentitions are now known from the Cretaceous (Cenomanian) Woodbine Formation, primarily from one new locality, the Arlington Archosaur Site of northeast Tarrant County.
The gene was used by one of the earliest dinosaurs - the archosaur - to help it see in the dark.
Despite a title promising clues to the origin of birds, Feduccia does not present his own branching hypothesis showing where Archaeopteryx fits into archosaur phylogeny.
It included 74 taxa coded for 240 characters, with the non-crocodylomorph pseudosuchian archosaur Postosuchus kirkpatricki used as the outgroup taxon.
Olsen and Baird (1986) argued that either an early ornithischian dinosaur or a non-dinosaurian archosaur converging on ornithischians in the structure of its feet left the distinctive tracks of Atreipus.
Dinosaurs are just part of this archosaur diversification, an explosion of new forms soon after the Permian extinction," Nesbitt said.