tribranchius, Atopocottus Bolin [R. L.] 1936:30, Fig. 6 [Proceedings of the United States National Museum v. 84 (no. 3000); ref. 505] Sea of Japan, 38°14'N, 138°54'E, Albatross station 4816, depth 64 fathoms. Holotype: USNM 102105. Paratypes: CAS-SU 30457 (3), USNM 102106 (7). Type catalog: Böhlke 1953:127 [ref. 12291]. •Valid as Atopocottus tribranchius Bolin 1936 -- (Yabe in Masuda et al. 1984:329 [ref. 6441], Lindberg & Krasyukova 1987:241 [ref. 15964], Nakabo 2000:639 [ref. 25086], Nakabo 2002:639 [ref. 26001], Matsunuma et al. 2017:93 [ref. 35372], Sonoyama et al. 2020:89 [ref. 37637]). Current status: Valid as Atopocottus tribranchius Bolin 1936. Psychrolutidae. Distribution: Northwestern Pacific: Japan and East China Sea. Habitat: marine.