longifilis, Sicyopterus de Beaufort [L. F.] 1912:140 [Zoologischer Anzeiger v. 39 (no. 3); ref. 235] Upper course of Tubah River, western Ceram, Indonesia. Syntypes: ZMA 112562 (orig. 3, now 2). Type catalog: Nijssen et al. 1982:104 [ref. 19236]. •Valid as Sicyopterus longifilis de Beaufort 1912 -- (Allen 1991:195 [ref. 21090], Parenti & Maciolek 1993:963 [ref. 21279], Kottelat et al. 1993:152 [ref. 23448], Larson & Murdy 2001:3602 [ref. 26293], Keith et al. 2012:304 [ref. 31972], Kottelat 2013:428 [ref. 32989], Fricke et al. 2014:172 [ref. 33932], Keith et al. 2015:244 [ref. 34172], Miesen et al. 2016:94 [ref. 34492], Maeda & Saeki 2018:255 [ref. 36339], Fricke et al. 2019:288 [ref. 36673], Amick & Toko 2021:8 [ref. 38599], Keith et al. 2021:148 [ref. 38257], Jamandre 2023:169 [ref. 40455]). Current status: Valid as Sicyopterus longifilis de Beaufort 1912. Oxudercidae: Sicydiinae. Distribution: Western Pacific: southern Japan, Taiwan, Philippines (Luzon, Panay, Negros, Mindanao), Indonesia (Seram, Babar, Ambon), Solomon Islands and Papua New Guinea [anadromous]. Habitat: freshwater, brackish, marine.