Bolosauridae

Belebey vegrandis

• North America, Eurasia

The Bolosauridae are a small group of Para reptiles, an extinct group of reptiles, and include the earliest representatives. They were herbivores and widespread in the Permian far beyond the northern continent of Laurasia.

Features

The skull was short and high, and had an elongated, low-lying skull window ( Infratemporale ) the top of cheekbone ( Jugale ) and squamosal ( squamosal ), was surrounded by Quadratojugale below. The orbit was very large and was on middle cranial length. My palate was toothless. A transverse outgrowth of the wing strut was on the same level as the palate. The teeth were bulbös ( tubers, onion -shaped). The legs were unusually slender.

Genera

Two Bolosaurier are Belebey from the Middle Permian of China and Russia and Bolosaurus from North America.

A third genus, whose fossil remains were found in Bromacker in Thuringia, is Eudibamus. The 290 million years ago living in the Lower Permian reptile was the first biped running ( on hind legs ) animal. Science and phrases such as " The first upright-walking Thuringian " suggest that Eudibamus ran on its hind legs only. Instead, the animal probably used this mode of transportation just to be able to run faster and went otherwise on all four legs. This so-called facultative bipedalism is, for example,, also observed in the recent frilled lizard or the helmet basilisk, both not closely related with Bolosauriden.

The separation of the basal Eudibamus and the sister group Belebey / Bolosaurus should be done before the Carboniferous - Permian boundary.