Classification of the subgenus Xenophora (Onustus)

G. †Onustus Swainson 1840
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Onustus borsoni Sismonda 1847
Onustus indicus Gmelin 1791
Invalid names: Trochotugurium Sacco 1896 [synonym], Tugurium Fischer 1880 [synonym], Xenophora (Trochotugurium) Sacco 1896 [synonym]