Classification of Ebbestad and Peel 1997

G. †Bucania Hall 1847
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†Bucania gracillima Koken 1896
G. †Holopea Hall 1847
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†Holopea harpa Angelin and Lindström 1880
G. †Gyronema Ulrich and Scofield 1897
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†Gyronema rupestre d'Eichwald 1856
G. †Platyceras Conrad 1840
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†Platyceras canalicatum Angelin and Lindström 1880
Subg. †Straparollus (Euomphalus) Sowerby 1814
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†Straparollus (Euomphalus) obtusangulus Angelin and Lindström 1880
Subg. †Platyceras (Platyceras) Conrad 1840
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†Platyceras (Platyceras) canaliculatum Angelin and Lindström 1880