Bivalvia - Cardiidia - Sanguinolitidae

Alternative combination: Grammysia carbonaria

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 Sanguinolites according to K.W. Ciriacks 1963

Sister taxa: Sanguinolites bisectus, Sanguinolites drupa, Sanguinolites elongatus, Sanguinolites hekitoensis, Sanguinolites ishii, Sanguinolites kamiyassensis, Sanguinolites lukjanovae, Sanguinolites modiomorphoides, Sanguinolites naiadiformis, Sanguinolites obliquus, Sanguinolites olseni, Sanguinolites peruvianus, Sanguinolites shumardi, Sanguinolites simulans, Sanguinolites sphenoidalis, Sanguinolites unioniformis, Sanguinolites woolnoughi, Sphenotus branneri, Sphenotus dubius, Sphenotus meslerianus, Sphenotus tentoriolus, Sphenotus pisinnus, Sphenotus washingtonensis, Sphenotus monroensis, Sphenotus aeolus, Sphenotus cataractes, Sphenotus cherokeense, Sphenotus oklahomense, Sphenotus quadriplicatum, Sphenotus gibsonense, Sphenotus altidorsatus

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

Average measurements (in mm): valve length 23.7