Cantharidus (Prothalotia) Thiele, 1930 (original rank) Prothalotia is a genus of sea snails, marine gastropod mollusks in the subfamily Cantharidinae of the family Trochidae, the top snails.

[2] The species in this genus occurs off Japan and Australia.

Species within the genus Prothalotia include: The Indo-Pacific Molluscan Database also includes the following species with names in current use :[3]

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