Bivalvia - Trigoniida - Trigoniidae

Alternative combinations: Schizodus oklahomaensis, Schizodus oklahomensis

Full reference: J. W. Beede. 1907. Invertebrate paleontology of the Upper Permian Red Beds of Oklahoma and the panhandle of Texas. Kansas University Science Bulletin 4:113-1171

Belongs to Lyroschizodus according to N. D. Newell and D.W. Boyd 1975

Sister taxa: Lyroschizodus djemelensis, Lyroschizodus orbicularis, Lyroschizodus praecox, Lyroschizodus subelegans, Lyroschizodus tobai

Type specimen: Its type locality is Whitehorse Spring (Kansas coll), which is in a Capitanian lagoonal/restricted shallow subtidal sandstone in the Whitehorse Formation of Oklahoma

Average measurements (in mm): valve length 12.6