Biarmosuchia

Ivantosaurus

• Russia
• China
• South Africa

The Biarmosuchia, also called Eotitanosuchia or Phthinosuchia were terrestrial vertebrates from the group of therapsids ( " mammal -like reptiles "). They were among the oldest and most primitive therapsids and lived during the Upper Permian.

Features

The skull was large, high, dorsal ( upper side ) bent convex and still largely corresponds to the Sphenacodontidae. The orbit ( bony eye socket) was large, a Sklerotikalring protected the eye. The Präparietale, an unpaired bone in front of the parietal bone ( parietal ), was missing. A single canine was much larger than any other teeth that were following this teeth smaller than in the Sphenacodontidae.

System

• Biarmosuchus
• Biseridens
• Eotitanosuchus
• Hipposaurus
• Ictidorhinus
• Ivantosaurus
• Lemurosaurus
• Phthinosuchus
• Burnetiidae

Burnetiidae

To the family of Burnetiidae include two small, very similar Biarmosuchiden, Burnetia from South Africa and Proburnetia from Russia. Both were carnivores. Their skulls were 20 cm long and covered with all sorts of bony outgrowths.

First they were classified as Dinocephalen or as gorgonopsians, but the absence of all these groups, the characteristics derived in the primitive Burnetiidae Biarmosuchia.

Sister species of Burnetiidae is the South African Lemurosaurus.