... orientations of two end-member morphologies of a dorsibiconvex brachiopod, Pseudoatrypa lineata, from the Mid–Late Devonian of North America by placing realistic models in a flume. Using materials with the specific gravity of calcium carbonate, we modeled two well-preserved Pseudoatrypa lineata from...

... be also assigned there due to its small dental cavities. Pseudoatrypa lineata (Webster, 1921) and P. missouriensis (Miller, 1894), as illustrated by Day and Copper (1998) , from North America also possess fine ribs, but their dorsal valve is extremely convex along the mid-line. Fig. 10...