Japonactaeon is a genus of small predatory sea snails, marine gastropod molluscs in the family Acteonidae, the barrel bubble snails. Species Species within the genus Japonactaeon include: Japonactaeon longissimus Valdés, 2008 Japonactaeon nipponensis (Yamakawa, 1911) (synonym: Acteon nipponensis Yamakawa, 1911) Distribution : Japan, Korea Length : 10 mm Japonactaeon punctostriatus (C. B. Adams, 1840) Japonactaeon pusillus (MacGillivray, 1843) Distribution : Florida, Japan, Mediterranean Length : 11 mm Description : found at depths of 200 to 820 m Japonactaeon sieboldii (Reeve, 1842) Distribution : Japan, Coral Sea, Philippines Length : 10 mm Description: found on sandy bottoms; whitish shell; first whorl with lighbrown color bordered with darker brown bands. Species brought into synonymy Japonactaeon suturalis (A. Adams, 1855); synonym of Pupa suturalis (A. Adams, 1855) References Taki I. (1956). Japonactaeon, a new genus of Pupidae (Opisthobranchia, Gastropoda). Bulletin of the National Science Museum, Tokyo, N. S. 3(1): 47-51 Acteonidae