Calliostoma stephanephorum is a species of sea snail, a marine gastropod mollusk in the family Calliostomatidae. The size of the shell varies between 13 mm and 55 mm. This marine species occurs off the Philippines and Borneo.
References
Kosuge, S., 1997. Description of a new species of the family Trochidae from south-western Pacific Ocean (Gastropoda). Bulletin of the Institute of Malacology, Tokyo 3(4):64–65, pl. 21.