Archaeopteryx lithographicia, Eichstatt Specimen Styracosaurus They appeared in the Cambrian

They appeared in the Cambrian period and flourished throughout the lower Paleozoic era before beginning a drawn-out decline to extinction when

and therefore likely the imprints of the animal's secondary remiges

There are only two known Dracorex skulls

This specimen is cast in solid resin and has been weighted

Conchoraptor gracilis 3D juvenile in matrix

Archaeopteryx lithographicia, Eichstatt Specimen Styracosaurus They appeared in the CambrianFound near Workerszell in 1951, it was described by P. Wellnhofer in 1974. This is the smallest of all the specimens, being some 2 3 the size of the others. It also differs in other aspects such as the tooth structure and the poorly ossified shoulder bones. It has been suggested that this is a separate genus, however the differences can also be ascribed to the possible juvenile stage of the animal and or a different feeding niche. However, this