Phthinosuchus

Phthinosuchus
Temporal range: Middle Permian, 268–265.8 Ma
↓
Life restoration of Phthinosuchus discors
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Clade: Synapsida
Clade: Therapsida
Suborder: †Dinocephalia (?)
Family: †Phthinosuchidae
Yefremov, 1954
Genus: †Phthinosuchus
Yefremov, 1954
Type species
†Phthinosuchus discors
Yefremov, 1954

Phthinosuchus is an extinct genus of therapsids from the Middle Permian of Russia. Phthinosuchus is the sole member of the family Phthinosuchidae. Phthinosuchus may have been one of the most primitive therapsids, meaning that its ancestors may have branched off early from the main therapsid line.

Discovery

Fossilized skull of P. discors

Phthinosuchus was named in 1954 by Ivan Yefremov. It is currently only known from the back of the skull, as the front of the skull was lost after description.[clarification needed] Two species, P. discors and P. horissiaki, have been described.[1]

Description

Phthinosuchus was 1.5 m (5 ft) long with a 20 cm skull, and looked much like the Sphenacodontids, such as Dimetrodon and Sphenacodon. Its temporal fenestrae were larger than those of the Sphenacodontids.[2][3] Its jaw was slender, unlike other predatory therapsids,[1] but like the other early therapsids, it was probably sprawling and carnivorous.

Classification

Phthinosuchus is a member of the suborder Phthinosuchia, which was made specifically for Phthinosuchus given that it did not fit into any other suborder.[1]

See also

References

  1. ^ a b c Dixon, Dougal (2015). The Complete Illustrated Encyclopedia of Dinosaurs & Prehistoric Creatures. Hermes House. p. 93.
  2. ^ Palmer, D., ed. (1999). The Marshall Illustrated Encyclopedia of Dinosaurs and Prehistoric Animals. London: Marshall Editions. p. 189. ISBN 1-84028-152-9.
  3. ^ "Phthinosuchus discors – Palaeocritti – a guide to prehistoric animals". Palaeocritti. Retrieved 2013-06-30.


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