masudai, Cocotropus Matsubara [K.] 1943:470, Fig. 156 [Transactions Sigenkagaku Kenkyusyo No. 2; ref. 2905] Hatizyô-zima, Idzu Islands, south of Tokyo, Japan. Holotype (unique): FAKU 1773. •Valid as Cocotropus masudai Matsubara 1943 -- (Poss & Eschmeyer 1978:405 [ref. 6387], Nakabo in Masuda et al. 1984:319 [ref. 6441], Poss & Allen 1987:79 [ref. 6616], Poss 1999:2357 [ref. 24796], Nakabo 2000:601 [ref. 25086], Nakabo 2002:601 [ref. 26001], Imamura & Shinohara 2003:233 [ref. 27213], Fricke 2004:2 [ref. 27662], Johnson 2004:180 [ref. 27781], Imamura & Shinohara 2004:204 [ref. 27943], Imamura & Shinohara 2008:23 [ref. 29563], Imamura et al. 2010:1 [ref. 30770], Prokofiev 2010:723 [ref. 31093], Han et al. 2016:117 [ref. 38852], Matsunuma et al. 2021:Table 2 [ref. 38266]). Current status: Valid as Cocotropus masudai Matsubara 1943. Synanceiidae: Aploactininae. Distribution: Northwestern Pacific: Hachijo Island (Izu Islands, Japan); southern Korea. Habitat: marine.