nipponensis, Malacocephalus Gilbert [C. H.] & Hubbs [C. L.] 1916:189, Pl. 9 (fig. 2) [Proceedings of the United States National Museum v. 51 (no. 2149); ref. 1636] Eastern coast of central Hondo, 33°25'10"N, 135°37'20"E, Japan, Albatross station 4967, depth 244-253 fathoms. Holotype (unique): USNM 76866. •Likely a synonym of Malacocephalus laevis (Lowe 1843) -- (Iwamoto & McMillan 2008:341 [ref. 30636], Iwamoto 2016:1985 [ref. 34585]). •Valid as Malacocephalus nipponensis Gilbert & Hubbs 1916 -- (Okamura in Okamura et al. 1982:145, 347 [ref. 8256], Okamura in Masuda et al. 1984:94 [ref. 6441], Okamura in Okamura & Kitajima 1984:203, 360 [ref. 8057], Iwamoto in Cohen et al. 1990:241 [ref. 18936], Iwamoto & Williams 1999:187 [ref. 23875], Nakabo 2000:420 [ref. 25086], Shinohara et al. 2001:306 [ref. 25995], Nakabo 2002:420 [ref. 26001], Shinohara et al. 2005:418 [ref. 28370], Iwamoto et al. 2015:86 [ref. 35408], Nakayama 2020:239 [ref. 37888]). Current status: Valid as Malacocephalus nipponensis Gilbert & Hubbs 1916. Macrouridae. Distribution: Western North Pacific: Japan and Taiwan. Habitat: marine.