niraikanaiensis, Stiphodon Maeda [K.] 2013:(4), Figs. 1-4 [Ichthyological Research v. 61 (no. 2); ref. 33023] Okinawa Island, Ryukyu Archipelago, Japan. Holotype: NSMT-P 114244. Paratypes: NSMT-P 114245 (1), URM-P 46084 (1). •Valid as Stiphodon niraikanaiensis Maeda 2013 -- (Maeda & Palla 2015:394 [ref. 33960], Maeda et al. 2015:256 [ref. 33999], Keith et al. 2015:213 [ref. 34328], Parenti 2021:427 [ref. 38603]). Current status: Valid as Stiphodon niraikanaiensis Maeda 2013. Oxudercidae: Sicydiinae. Distribution: Northwestern Pacific: Okinawa Island, Ryukyu Archipelago (Japan) [amphidromous]. Habitat: freshwater, brackish, marine.