Classification of Harasewych and Beu 2007

Superfm. Tonnoidea Suter 1913
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Fm. Ranellidae Gray 1854 [triton shell]
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Subfm. Cymatiinae Iredale 1913
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G. Sassia Bellardi 1872
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†Sassia apenninica Sassi 1827
Sassia melpangi Harasewych and Beu 2007