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 ?
This is underway with a very recent paper by Czerkas and Feduccia (2014, Journal of Ornithology 155:841-851) in which they conclude that the Jurassic archosaur Scansoriopteryx (= Epidendrosaurus) is a non-dinosaur bird; this taxon was already discussed by Feduccia (pp.
The Company provides many new features in the ''Special Annual Edition,'' including ''first class territory combat'' in Archosaur and Wanliu cities, a new Tianshu system for different classes, coupons for learning new Xianmo skills and for a limited 7-day period, Perfect Treasure Box, which includes pets with strong attack powers and Ultimate Magic Stones etc.
The gene was used by one of the earliest dinosaurs - the archosaur - to help it see in the dark.
Delta Plain environments and ecology of the Cretaceous (Cenomanian) Woodbine Formation at the Arlington Archosaur Site.
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.
madagaskarensis shows that traits associated with herbivory were much more widespread across archosaur reptiles.
Experts suggest that such a breathing pattern likely evolved before 246 million years ago, when crocodilians split from the branch of the archosaur family tree that led to pterosaurs, dinosaurs and birds.
They also suspect that this is the mechanism that the archosaur ancestors of modern crocodilians and birds used to pinpoint sounds.
But Farmer cautions that because lizard lungs have a different structure than bird and alligator lungs, it is also possible that one-way airflow evolved independently about 30 million years ago in the ancestors of monitor lizards and about 250 million years ago in the archosaurs, the group that gave rise to alligators, dinosaurs and birds.