Classification of the subfamily Potamidinae
Subfm. Potamidinae Adams and Adams 1854 [horn snail]
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G. †Hannatoma Olsson 1931
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†Hannatoma emendorferi Olsson 1931
†Hannatoma gesteri Hanna and Israelsky 1925
†Hannatoma tumbezia Olsson 1931
G. Pirenella Gray 1847
G. †Tylochilus Cossmann 1889