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meaning: "Withered crocodile"
Named By: Efremov in 1954
Time Period: Middle Permian, 268-265.8 Ma
Location: Russia
Size: Total length uncertain due to incomplete fossil material, although estimates often cite 1.5 meters long. Skull is about 20 centimetres long
Diet: Carnivore
Fossil(s): Partial skull
Classification: | Chordata | Synapsida | Therapsida | Phthinosuchia | Phthinosuchidae |

Phthinosuchus is an extinct genus of therapsid 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.

Phthinosuchus was 1.5 m 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. Like the other early therapsids, it was probably sprawling and carnivorous.

Read more about Phthinosuchus at Wikipedia
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