Classification of the family Drepanellidae
Fm. †Drepanellidae Ulrich and Bassler 1923
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G. †Acantonodella Zaspelova 1952
G. †Boursella Turner 1939
G. †Drepanella
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†Drepanella richardsoni Miller 1874
†Drepanella richardsoni canadensis Ulrich 1890
G. †Duplexibollia Schallreuter 1987
G. †Neodrepanella Zaspelova 1952
G. †Nodella Zaspelova 1952
G. †Parulrichia
G. †Planusella
G. †Quadricollina
G. †Scofieldia Ulrich and Bassler 1908
Invalid names: Bolliinae Boucek 1936 [empty], Drepanellinae Ulrich and Bassler 1923 [empty], Nodellinae Zaspelova 1952 [empty]