Gastropoda - Euomphalina - Platyceratidae
Full reference: T. A. Conrad. 1842. Observations on the Silurian and Devonian systems of the United States, with descriptions of new organic remains. Journal of the Academy of Natural Sciences of Philadelphia 8(2):228-280
Parent taxon: Platyostoma according to Conrad 1842
Sister taxa: Platyostoma adstrictum, Platyostoma allardycei, Platyostoma antiquuis, Platyostoma boggsi, Platyostoma brownsportense, Platyostoma cliftonensis, Platyostoma cornutum, Platyostoma daytonense, Platyostoma deforme, Platyostoma delicata, Platyostoma desmatum, Platyostoma euomphaloides, Platyostoma gebhardi, Platyostoma grayvillensis, Platyostoma hemispherica, Platyostoma humile, Platyostoma humilis, Platyostoma incisum, Platyostoma indica, Platyostoma insolita, Platyostoma invictus, Platyostoma irrasum, Platyostoma lineata, Platyostoma lutheri, Platyostoma minutissima, Platyostoma modesta, Platyostoma muitissima, Platyostoma naticoides, Platyostoma niagarensis, Platyostoma pastillus, Platyostoma perceense, Platyostoma perforatum, Platyostoma plebeium, Platyostoma pleurotoma, Platyostoma rotundatum, Platyostoma rowei, Platyostoma speciosum, Platyostoma strophius, Platyostoma subglobosa, Platyostoma triangularis, Platyostoma tumidum, Platyostoma turbinata, Platyostoma unisulcata, Platyostoma ventricosum
Subtaxa: none
Ecology: passively mobile epifaunal coprophage
Distribution: found only at Unit 1(4ft below top), Upper Shale Member Mahantango Fm, Girty's Notch, PA (Devonian of Pennsylvania)