Doryaspis nathorsti, primitive jawless fish Protoceratops 8 m in height and

8 m in height and a weight between 1 and 2

Washington

indicating bipedal locomotion

anchoring for extra muscle support and rigidity for the backbone

Doryaspis nathorsti, primitive jawless fish Protoceratops 8 m in height andDoryaspis ("Dart Shield") (also known by its synonym, "Lyktaspis") is an extinct genus of primitive jawless fish that lived in the Devonian period. Fossils have been discovered in Spitsbergen. The animals had a canteen shaped body armor, and had large branchial plates that extended out and curved downward in a triangular shape, very similar to those of the pycnosteids. An element of the median oral plates (that would correspond to the lower lip or