Classification of the subfamily Diastomatinae
Subfm. Diastomatinae Cossmann 1894
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G. †Aurelianella Cossmann 1893
G. †Dialopsis Cossmann 1888
G. †Keilostoma Deshayes 1848
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†Keilostoma californicum Vokes 1939
†Keilostoma malingi Marwick 1943
†Keilostoma quaidei Allison 1955
†Keilostoma septmzonatum Cox 1952
Invalid names: Paryphostoma Bayan 1861 [synonym]
G. †Telostoma Harris and Burrows 1891