armatus, Lentipes Sakai [H.] & Nakamura [M.] 1979:46, Fig. 5 [Japanese Journal of Ichthyology v. 26 (no. 1); ref. 8789] Arakawa River, about 500 meters from river mouth, Ishigaki Island, Ryukyu Islands, Okinawa Prefecture, Japan, 24°20'N, 124°15'E. Holotype: NSMT-P 29296. Paratypes: NSMT-P 20775 (1, c&s), 28175 (1), 29315 (1). •Valid as Lentipes armatus Sakai & Nakamura 1979 -- (Akihito in Masuda et al. 1984:285 [ref. 6441], Nishimoto & Fitzsimons 1986:811 [ref. 6319], Kawanabe & Mizuno 1989:633 [ref. 25598], Maugé et al. 1992:215 [ref. 19910], Allen 1997:39 [ref. 22875], Watson & Allen 1999:117 [ref. 24140], Nakabo 2000:1158 [ref. 25182], Allen 2001:123 [ref. 25303], Sakai et al. 2001:113 [ref. 25693], Nakabo 2002:1158 [ref. 26193], Watson et al. 2002:176 [ref. 26364], Yonezawa et al. 2010:254 [ref. 30902], Keith et al. 2014:134 [ref. 33420], Keith et al. 2015:46 [ref. 34328], Keith et al. 2016:140 [ref. 34452], Maeda et al. 2021:10 [ref. 38708], Parenti 2021:411 [ref. 38603], Harefa & Chen 2022:65 [ref. 39624], Jamandre 2023:168 [ref. 40455]). Current status: Valid as Lentipes armatus Sakai & Nakamura 1979. Oxudercidae: Sicydiinae. Distribution: Western Pacific: Ryukyu Islands (Japan) to Taiwan, and probably Cebu (Philippines) [amphidromous]. Habitat: freshwater, brackish, marine.