Classification of Marks 1949
G. Cancellaria Lamarck 1799
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G. Trigonostoma Blainville 1827
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†Trigonostoma plummeri Olsson 1922
†Trigonostoma toroensis Olsson 1922
Subg. Cancellaria (Tribia) Jousseaume 1887
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†Cancellaria (Tribia) epomis Woodring 1928