Jump to content


From Simple English Wikipedia, the free encyclopedia

Temporal range: Triassic, 242–201 mya
Skeleton of Redondasaurus at the Carnegie Museum of Natural History
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Reptilia
Clade: Archosauriformes
Clade: Crurotarsi
von Meyer, 1861
Order: Phytosauria
Jaeger, 1828

Parasuchia Huxley, 1875

Phytosaur skull: Rutiodon

Phytosaurs are an extinct group of large semi-aquatic Upper Triassic archosaurs.

Phytosaurs were long-snouted and heavily armoured, bearing a remarkable resemblance to modern crocodiles in size, appearance, and lifestyle.[1] This is an example of convergence or parallel evolution.

The name 'phytosaur' means 'plant reptile': the first fossils of phytosaurs were mistakenly thought to belong to plant eaters. The sharp teeth in phytosaur jaws clearly show they were predators.

Although phytosaurs were not true crocodilians, they were more closely related to the crocodilians than to other modern reptiles.[2] Crocodiles did not become phytosaur-like until the Lower Jurassic. "Consensus generally places phytosaurs as basal crurotarsans, possibly the basal-most group".[3]

Phytosaurs had a nearly global distribution. Fossils have been recovered from Europe, North America, India, Morocco, Thailand, Brazil and Madagascar.

References[change | change source]

  1. Benton M.J. 1990. The reign of the reptiles. Crescent, New York. p75
  2. Jones, Andrew S.; Butler, Richard J. 2018. A new phylogenetic analysis of Phytosauria (Archosauria: Pseudosuchia) with the application of continuous and geometric morphometric character coding. PeerJ. 6: e5901. [1]
  3. Brusatte, Stephen L. et al 2010. The higher-level phylogeny of Archosauria (Tetrapoda: Diapsida). Journal of Systematic Palaeontology. 8: 1, 3–47. [2]