Full reference: B. Runnegar and J., J.r. Pojeta. 1974. Molluscan phylogeny: the paleontological viewpoint. Science 186(4161):311-317
Parent taxon: Mollusca according to B. Runnegar and P.A. Jell 1976
Sister taxa: Acevina, Actinoconus, Aculopileus, Acutirostriconus, Aldanolina, Algomella, Anisomyaria, Aulacotrochus, Aviculocephaloconus, Bagenoviella, Beroides, Bisulcus, Bivalvia, Calyptoptomatida, Cambroscutum, Centriconus, Cephalopoda, Chiton cottae, Codonoconus, Conchifera, Conchula, Corystos, Crestoconus, Dingus, Diplacophora, Dysmea, Dysnoetopla, Ebianella, Eosoconus, Gastropoda, Granoconus, Gutticonus, Hamatoconus, Helcionelloida, Hemithecellitina, Huangshandogoconus, Huangshandongoconus, Kaschkadakia, Katunioides, Kepinospira, Khairkhaniidae, Khairkhaniiformes, Kraikchania, Kuanchuanella, Laticonus, Liantuoconus, Ligyrokala, Mackenziella, Maikhanellidae, Makarakia, Merismoconcha, Minymerisma, Nothamusium, Odontogriphus, Omalenlina, Paragastropoda, Peotoconus, Polytropis, Porcaconus, Proconus, Pseudomatthevia, Rostroconchia, Sachitida, Salanyella, Sargaella, Scamboscamna, Scaphopoda, Serialia, Sinuconus, Songlingella, Spatuloconus, Stenothecella, Sulcocarina, Tergomya, Trunctoconus, Tuberoconus, Xenoconchia, Xilingxiaconus, Xinnanospira, Yangtzemerisma
Subtaxa: none
Distribution: there are no occurrences of Cyrtostoma in the database