Bivalvia - Cardiida - Kalenteridae

Full reference: N. D. Newell and D.W. Boyd. 1999. A new Lower Triassic Permophorus from the central Rocky Mountains. American Museum Novitates 3263:1-565

Belongs to Permophorus according to M. Hautmann et al. 2013

Sister taxa: Permophorus albequus, Permophorus angustus, Permophorus bregeri, Permophorus costatus, Permophorus gregarius, Permophorus guangxingensis, Permophorus lianyuanensis, Permophorus mexicanus, Permophorus oblongus, Permophorus obovatus, Permophorus octocostatus, Permophorus pricei, Permophorus proprius, Permophorus shuangfengensis, Permophorus subcostatus, Permophorus subovalis, Permophorus tenuistriatus, Permophorus vendiavkiriensis, Pleurophorus tropidophorus, Pleurophorus occidentalis, Pleurophorus delawarensis, Pleurophorus imbricatus, Pleurophorus lunulus, Pleurophorus overbecki, Pleurophorus quinquecostatus

Type specimen: AMNH 44088, a valve (Right valve). Its type locality is AMNH B7850, Commissary Ridge, which is in a Spathian marine limestone in the Thaynes Formation of Wyoming.

Ecology: facultatively mobile shallow infaunal suspension feeder

Average measurements (in mm): valve length 38.6