Pseudodiadematidae Pomel, 1883
Common Name: Sea urchin
Key morphological features: Test is generally flat and small to moderate in size. Has raised bumps that form vertical striations.
FEEDING MODE: Deposit Feeder, Herbivore
Fell, H. B. and Pawson, L. P., 1966. Systematic Descriptions, in R. C. Moore ed., Treatise on Invertebrate Paleontology, Part U, Echinodermata 3, Volume 2. The University of Kansas and Geological Society of America. 695 pp.