PaleoDB taxon number: 267594
Full reference: O. Haas. 1953. Mesozoic invertebrate faunas of Peru. Bulletin of the American Museum of Natural History 101:1-328
Type specimen: Its type locality is Cerro de Pasco area, Ninacaca, loc78, which is in a Rhaetian marine limestone in Peru.
Ecology: epifaunal grazer
Average measurements (in mm): shell width 1.93