Bivalvia - Trigoniida - Schizodidae

Full reference: G. H. Girty. 1910. The fauna of the Phosphate beds of the Park City Formation. United States Geological Survey Bulletin 436:1-82

Belongs to Schizodus according to K.W. Ciriacks 1963

Sister taxa: Schizodus acuminatus, Schizodus affinis, Schizodus alpinus, Schizodus altus, Schizodus amplus, Schizodus australis, Schizodus bifidus, Schizodus canalis, Schizodus cardissa, Schizodus chesterensis, Schizodus cloacinus, Schizodus compressus, Schizodus compressus, Schizodus crespinae, Schizodus cycloliratus, Schizodus depressus, Schizodus dianensis, Schizodus dubiiformis, Schizodus elongatus, Schizodus emarginatus, Schizodus fitzroyensis, Schizodus guizhouensis, Schizodus hedongensis, Schizodus japonicus, Schizodus jiangbianensis, Schizodus jiangheensis, Schizodus jiangxiensis, Schizodus kennedyensis, Schizodus lianyuanensis, Schizodus lopingensis, Schizodus meekanus, Schizodus obscurus, Schizodus occidentalis, Schizodus parvulus, Schizodus pinguis, Schizodus rhynchophorus, Schizodus rossicus, Schizodus sandimanensis, Schizodus schlotheimi, Schizodus securus, Schizodus sinensis, Schizodus subobscurus, Schizodus subovatus, Schizodus subquadratus, Schizodus supaiensis, Schizodus texanus, Schizodus tibeticus, Schizodus trigonalis, Schizodus truncatus, Schizodus ulrichi, Schizodus wheeleri, Schizodus wyomingensis, Schizodus xiangtanensis

Type specimen: Its type locality is USGS 980, Waterloo Mine, Montpelier, which is in a Roadian offshore ramp limestone in the Phosphoria Formation of Idaho

Ecology: facultatively mobile infaunal suspension feeder

Average measurements (in mm): valve length 26.1