Calliostoma formosense, common name the Formosa top shell, is a species of sea snail, a marine gastropod mollusk in the family Calliostomatidae.

[2] Some authors place this taxon in the subgenus Calliostoma (Benthastelena).

The size of the shell varies between 35 mm and 63 mm.

This marine species occurs off Taiwan.

This Calliostomatidae-related article is a stub.