Shells with two or more spines, horns or protuberances
This group has no taxonomical significance.
Centropyxis sp., ventral view Centropyxis
A. scandinavica, Sjøforsen, Norway, 2023
P. sinuospina — after Chardez,
P. ventricosa — after Thomas
P. setigera — after Wailes,
P. lapponum, in frontal and lateral