The biostratinomy of Dikelocephalus sclerites: implications for the use of trilobite attitude data.

Model sclerites of the trilobite Dikelocephalus were qualitatively observed under 2 different hydrodynamic conditions: falling through still water and entrained in flowing water. Most pygidia were found to glide backwards through still water in a convex up attitude, whereas most cranidia glided forw...