riukiuensis, Dinematichthys Aoyagi [H.] 1954:237 [English p. 238] [Dobutsugaku Zasshi = Zoological Magazine Tokyo v. 63 (no. 6); ref. 12636] Ishigaki Island, Okinawa Prefecture, Ryukyu Islands, Japan. Lectotype: YCM-P 30023. Paralectotypes: (8) YCM-P 30001 (1), 30025 (3). Type catalog: Shibata et al. 2011:12 [ref. 31469]. Type information: Hayashi 1995:11 [ref. 22717]. Lectotype desingnation: Hayashi 1995:11 [ref. 22717]. •Valid as Dinematichthys riukiuensis Aoyagi 1954 -- (Machida 1994:461 [ref. 21217], Nielsen & Cohen in Nielsen et al. 1999:130 [ref. 24448], Nakabo 2000:450 [ref. 25086], Nakabo 2002:450 [ref. 26001], Møller et al. 2004:149 [ref. 27770], Hoese & Gates 2006:572 [ref. 28997], Shao et al. 2008:243 [ref. 29952]). •Valid as Alionematichthys riukiuensis (Aoyagi 1954) -- (Møller & Schwarzhans 2008:113 [ref. 29997], Motomura et al. 2010:77 [ref. 31256], Fricke et al. 2011:367 [ref. 31242], Allen & Erdmann 2012:131 [ref. 31980], Fricke et al. 2014:33 [ref. 33932], Møller et al. 2016:Appendix B [ref. 34432], Fricke et al. 2019:71 [ref. 36673]). Current status: Valid as Alionematichthys riukiuensis (Aoyagi 1954). Dinematichthyidae. Distribution: Indo-West Pacific: Andaman Sea east to Philippines, New Ireland (Papua New Guinea) and Vanuatu, north to southern Japan, south to Queensland (Australia) and New Caledonia. Habitat: marine.