Classification of the genus Tritonalia
Subg. Purpura (Tritonalia) Fleming 1828
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†Purpura (Tritonalia) vindobonensis Hörnes 1856
†Tritonalia dorrancei Loel and Corey 1932
†Tritonalia quilonica Dey 1961
Tritonalia suborbiculata Dunker 1846
†Tritonalia volutaeformis Dickerson 1915
†Tritonalia yneziana Loel and Corey 1932