unicolor, Apogon Steindachner [F.] & Döderlein [L.] 1883:2 [Denkschriften der Kaiserlichen Akademie der Wissenschaften in Wien, Mathematisch-Naturwissenschaftliche Classe. v. 48 (1. Abth.); ref. 4247] Yokohama, Tokyo Bay; Kochi; Kagoshima (Japan). No types known. Appeared first as name in synonymy -- name mentioned in passing in synonymy of Apogon bifasciatus Rüppell 1838. Validated back to Steindachner & Döderlein 1883 based on Jordan & Snyder 1901:749, Pl. 33 [ref. 2504]. The Jordan & Snyder description was based on USNM 49708 from Yokohama, Japan. Since Steindachner & Döderlein were the authors of ref. 4247, they are the authors of Apogon unicolor. •Valid as Apogon unicolor Steindachner & Döderlein 1883 -- (Hayashi in Masuda et al. 1984:148 [ref. 6441], Allen 1993:16 [ref. 20779], Allen 1997:104 [ref. 23977], Fraser 1998:990 [ref. 23602], Allen 1999:2607 [ref. 24812], Nakabo 2000:760 [ref. 25086], Allen in Randall & Lim 2000:614 [ref. 25122], Sadovy & Cornish 2000:100 [ref. 25480], Hutchins 2001:32 [ref. 25847], Nakabo 2002:760 [ref. 26001], Allen et al. 2006:1097 [ref. 29004], Greenfield 2007:601 [ref. 29453], Yoshida et al. 2011:121 [ref. 32402], Larson et al. 2013:108 [ref. 32988], Mabuchi et al. 2014:197 [ref. 33426], Mabuchi et al. 2015:42 [ref. 34429], Kuiter & Kozawa 2019:32 [ref. 36965], Gon et al. 2020:499 [ref. 38029], Ogimoto et al. 2022:11 [ref. 39035]). Current status: Valid as Apogon unicolor Steindachner & Döderlein 1883. Apogonidae: Apogoninae. Distribution: Northwestern Pacific: Honshu south to Kyushu and Nansei Islands (Japan), including Sea of Japan coast (Japan). Habitat: marine.