Classification of the genus Trichotropis
G. Trichotropis Broderip and Sowerby 1829
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Subg. Trichotropis (Provanna) Dall 1918
†Trichotropis alienensis Effinger 1938
Trichotropis borealis Broderip and Sowerby 1829
†Trichotropis squamosa Gabb 1876
Trichotropis tricarinata Addicott 1970