Ornithosuchus

Ornithosuchus Temporal range: Late Triassic Carnian PreЄ Є O S D C P T J K Pg N
Ornithosuchus longidens
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Reptilia
Branch:	Pseudosuchia
Family:	†Ornithosuchidae
Genus:	†Ornithosuchus
Species
†O. longidens (type) (originally Dasygnathus longidens)
Synonyms
Dasygnathus longidens Ornithosuchus taylori Ornithosuchus woodwardi

Ornithosuchus (meaning "bird crocodile") is an extinct genus of crurotarsan from the Late Triassic (Carnian) Lossiemouth Sandstone of Scotland. Originally it was thought to be the ancestor to the carnosaur dinosaurs (which then included Tyrannosaurus), however now it is known to be more closely related to crocodilians than dinosaurs.

Despite this relationship to crocodiles, Ornithosuchus was able to walk on its hind legs, like many dinosaurs. However, it probably spent most of its time on all fours, only moving bipedally when it needed to run rapidly. Its skull also resembled those of theropod dinosaurs, but more primitive features included the presence of five toes on each foot and a double row of armoured plates along the animal's back. Ornithosuchus was around 4 metres (13 ft) in length.^[1]

Classification

Ornithosuchus and Hyperodapedon.

A single species of Ornithosuchus has been described, the type species, O. longidens. Ornithosuchus is the type genus of the Ornithosuchidae, a family of facultatively biped carnivores that were geographically widespread during the Late Triassic. Two other genera are currently known, Venaticosuchus and Riojasuchus.

References

1. ^ Palmer, D., ed (1999). The Marshall Illustrated Encyclopedia of Dinosaurs and Prehistoric Animals. London: Marshall Editions. p. 97. ISBN 1-84028-152-9. 

• Walker, A.D. (1964). "Triassic reptiles from the Elgin area: Ornithosuchus and the origin of carnosaurs". Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences, 248(744): 53-134.

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