PaleoDB taxon number: 403798
Full reference: L. R. Saul. 1989. California Late Cretaceous donaciform bivalves. The Veliger 32(2):188-208
Type specimen: LACMIP 7848. Its type locality is UCLA loc. 3622, Chico Creek, which is in a Santonian marine horizon in the Chico Formation of California.
Average measurements (in mm): 18.0 x 9.9