Classification of Tolmachoff 1930
Cl. Gastropoda Cuvier 1795 [snail]
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G. †Bellerophon de Montfort 1808
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†Bellerophon carinatus Tolmachoff 1930
†Bellerophon scheii Tolmachoff 1930
†Bellerophon sverdrupi Tolmachoff 1930
G. †Lepetopsis Whitfield 1882
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†Lepetopsis concentrica Tolmachoff 1930
†Lepetopsis devonica Tolmachoff 1930
†Lepetopsis recta Tolmachoff 1930
G. †Euomphalus Sowerby 1814
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†Euomphalus sinister Tolmachoff 1930
†Euomphalus tuberculatus Tolmachoff 1930
G. †Holopea Hall 1847
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†Holopea marylandica Clarke and Swartz 1913
†Holopea simmonensis Tolmachoff 1930
G. †Euryzone Koken 1896
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†Euryzone intermedia Tolmachoff 1930
†Euryzone striata Tolmachoff 1930
G. †Gosseletina Fischer 1885
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†Gosseletina brondensis Tolmachoff 1930
†Gosseletina broondensis Tolmachoff 1930
G. †Platyceras Conrad 1840
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†Platyceras fecundum Perner 1911
†Platyceras perneri Tolmachoff 1930
G. †Loxonema Phillips 1841
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†Loxonema priscum Münster 1840
†Loxonema solvens Perner 1907
†Loxonema stylum Tolmachoff 1930
†Loxonema trochleatum Münster 1840
G. †Macrochilina Bayle 1880
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†Macrochilina elongata Phillips 1841
†Macrochilina fusoidalis Tolmachoff 1930
†Macrochilina whidborni Tolmachoff 1930