japonicus, Trachichthys Döderlein [L.] in Steindachner & Döderlein 1883:49 [Anzeiger der Kaiserlichen Akademie der Wissenschaften, Wien, Mathematisch-Naturwissenschaftliche Classe v. 20 (no. 7) (for 8 Mar. 1883); ref. 20489] Tokyo, Japan. Syntypes: MZS 2021 (1); NMW 42283 (1), ?ZMB 12066 (1). Species illustrated and described in more detail in Steindachner & Döderlein 1883:218 [p. 10 of separate] Pl. 2 (figs. 1-3) [ref. 4246]. Type information (MZS, ZMB) from Amaoka & Fujii 1999:158 [ref. 26515]. •Synonym of Gephyroberyx darwinii (Johnson 1866) -- (Nielsen 1973:340 [ref. 6885], Maul 1990:620 [ref. 17237], Kotlyar 1996:124 [ref. 23292], Konishi 1999:62 [ref. 24259], Kim et al. 2004:10 [ref. 27746]). •Valid as Gephyroberyx japonicus (Döderlein 1883) -- (Yamakawa in Okamura et al. 1982:203, 365 [ref. 8256], Yamakawa in Masuda et al. 1984:109 [ref. 6441], Konishi & Okiyama 1997:66 [ref. 23509], Nakabo 2000:500 [ref. 25086], Paxton & Moore in Randall & Lim 2000:601 [ref. 25122], Shinohara et al. 2001:311 [ref. 25995], Nakabo 2002:500 [ref. 26001], Shinohara et al. 2005:422 [ref. 28370], Mundy 2005:304 [ref. 28379], Miyazaki et al. 2019:123 [ref. 37957]). Current status: Valid as Gephyroberyx japonicus (Döderlein 1883). Trachichthyidae. Distribution: Northwestern and northern central Pacific: Japan, Kyushu Palau Ridge, northern Hawaiian Ridge. Habitat: marine.