Full reference: J. Hall and R. P. Whitfield. 1872. Notice of two new species of fossil shells from the Potsdam sandstone of New York. Annual report of the Regents of the University of the State of New York 23:241-242
Parent taxon: Mollusca according to J. Hall and R. P. Whitfield 1873
Sister taxa: Acaenoplax, Acevina, Actinoconus, Aculopileus, Acutirostriconus, Aldanolina, Algomella, Anisomyaria, Aplacophora, Asperoconus, Aviculocephaloconus, Bagenoviella, Beroides, Bisulcus, Bivalvia, Calyptoptomatida, Cambroscutum, Caudofoveata, Centriconus, Cephalopoda, Codonoconus, Conchifera, Conchula, Corystos, Crestoconus, Cyrtostoma, Dingus, Diplacophora, Dysnoetopla, Ebianella, Eosoconus, Gastropoda, Granoconus, Gutticonus, Hamatoconus, Helcionelloida, Hemithecellitina, Huangshandogoconus, Huangshandongoconus, Hubeinella, Hyolitha, Kaschkadakia, Katunioides, Kepinospira, Khairkhaniidae, Khairkhaniiformes, Kraikchania, Kuanchuanella, Ladamarekiidae, Laticonus, Liantuoconus, Ligyrokala, Mackenziella, Macroscenella, Maikhanellidae, Makarakia, Merismoconcha, Minymerisma, Nothamusium, Odontogriphus, Omalenlina, Orthoconus, Paragastropoda, Parascenella, Patelliconidae, Peotoconus, Pichynella, Polytropis, Porcaconus, Proconus, Pseudomatthevia, Rostroconchia, Sargaella, Scamboscamna, Scaphopoda, Scenellopsis, Serialia, Shabaktiella, Sichuanospira, Sinuconus, Solandangella, Solenogastres, Songlingella, Spatuloconus, Stenothecella, Stenothecoida, Sulcocarina, Tentaculita, Tergomya, Trunctoconus, Tuberoconus, Xilingxiaconus, Xinnanospira, Yangtzemerisma
Subtaxa: Palaeacmaea discoides, Palaeacmaea horizontalis, Palaeacmaea magnifica, Palaeacmaea postuma, Palaeacmaea typica