This therapsid belonged to the group of gorgonopsids

it was a very successful group and became contemporary with early humans before going extinct

The location of Dryosaurus altus fossils has been found in several states in the United States

especially in Brazil

Approximate measurements of the Nothosaurus: Scale 1:35 - 110 mm

Pachycephalosaurus Variante:Imprimado This therapsid belonged to thePachycephalosaurus (P. wyomingensis ` Lagarto de cabeza gruesa ) era un dinosaurio herbvoro ramoneador que vivi durante el perodo Cretcico tardo, hace aproximadamente 70 millones de aos. Era un dinosaurio bpedo con un crneo grande y redondeado, con una bveda craneal gruesa que probablemente utilizaba en las peleas de dominancia entre machos. El Pachycephalosaurus meda alrededor de 5 metros de largo, 2,5 metros de altura y pesaba alrededor de 2000