japonicus, Polyipnus Schultz [L. P.] 1961:643, Fig. 19 [Proceedings of the United States National Museum v. 112 (no. 3449); ref. 10156] Kii Strait, Japan. Holotype (unique): SIO H53-367. Polyipnus matsubarai and Polyipnus japonicus were described in the same work; Baird 1971:101 [ref. 7665] serves as first reviser selecting matsubarai over japonicus. •Synonym of Polyipnus matsubarai Schultz 1961 -- (Harold 1994:477 [ref. 21941]). Current status: Synonym of Polyipnus matsubarai Schultz 1961. Sternoptychidae: Sternoptychinae. Habitat: marine.