Doryaspis nathorsti, primitive jawless fish Protoceratops Because hundreds of specimens have

Because hundreds of specimens have been found at Sihuten

indicating bipedal locomotion

and isopods (sow bugs)

anchoring for extra muscle support and rigidity for the backbone

but when found

Doryaspis nathorsti, primitive jawless fish Protoceratops Because hundreds of specimens haveDoryaspis ("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