japonicum, Zenion Kamohara [T.] 1934:597, Fig. [Proceedings of the Imperial Academy. Tokyo. v. 10 (no. 9) (art. 168); ref. 16431] Off Mimase, Kochi Prefecture, Japan. Kamohara "neotype": BSKU 9394. Type catalog: Kamohara 1961:5 [ref. 19282]. "Neotype" designated by Kamohara 1961:5 [ref. 19282], but neotype designation was not made in a revisory work and is invalid. •Synonym of Zenion hololepis Goode & Bean 1896 -- (Heemstra 1999:2258 [ref. 24791], Heemstra in Randall & Lim 2000:602 [ref. 25122], Heemstra 2016:2216 [ref. 34607]). •Valid as Zenion japonicum Kamohara 1934 -- (Ida in Okamura et al. 1982:217, 371 [ref. 8256], Machida in Masuda et al. 1984:118 [ref. 6441], Machida in Okamura et al. 1985:449, 658 [ref. 8056], Paxton et al. 1989:387 [ref. 12442], Pequeño 1989:54 [ref. 14125] as japonicus, Nakabo 2000:505 [ref. 25086], Shinohara et al. 2001:311 [ref. 25995], Nakabo 2002:505 [ref. 26001], Shinohara et al. 2005:423 [ref. 28370], Paxton et al. 2006:796 [ref. 28995], Shinohara et al. 2014:244 [ref. 33330], Motomura et al. 2015:17 [ref. 34709], Sáez & Lamilla 2017:98 [ref. 36389], Fricke et al. 2019:88 [ref. 36673]). Current status: Valid as Zenion japonicum Kamohara 1934. Zeniontidae. Distribution: Pacific Ocean: South China Sea east to Chile, north to southern Japan, south to northern Australia. Habitat: marine.