ryukyuensis, Plecoglossus altivelis Nishida [M.] 1988:236, Fig. 1 [Japanese Journal of Ichthyology v. 35 (no. 3); ref. 12742] Sumiyo River, Amami-oshima Island, Ryukyu Islands, Japan, 27°16.0'N, 129°24.5'E. Holotype: URM-P18462. Paratypes: URM-P18463-64 (24, 31). •Synonym of Plecoglossus altivelis (Temminck & Schlegel 1846), but a valid subspecies ryukyensis Nishida 1988 as described -- (Kawanabe & Mizuno 1989:80 [ref. 25598], Sawashi & Nishida 1994:253 [ref. 22345], Nakabo 2000:297 [ref. 25086], Sakai et al. 2001:88 [ref. 25693], Nakabo 2002:297 [ref. 26001], Shan et al. 2005:61 [ref. 28360]). Current status: Synonym of Plecoglossus altivelis (Temminck & Schlegel 1846). Plecoglossidae. Distribution: Ryukyu Islands [subspecies]. Habitat: freshwater.