found: Work cat.: Thompson, E.H. Morphology and taxonomy of Cyclonema Hall (Gastropoda), Upper Ordovician Cincinnatian Province, 1970:p. 234 (Family Platyceratidae, Superfamily Platyceratacea, Suborder Trochina, Order Archaeogastropoda)
found: The paleobiology database, via WWW, Oct. 25, 2006(family Platyceratidae, superfamily Platyceratoidea, order Euomphalina, subclass Eogastropoda, class Gastropoda)
found: Google search, Oct. 25, 2006(Paleozoic families Euomphalidae and Platyceratidae (Archeogastropoda); Platyceratidae, order Euomphalida, Ordovician-Permian; platyceratid gastropod; platyceratids)
