microcephalus, Sicydium Bleeker [P.] 1855:437 [Natuurkundig Tijdschrift voor Nederlandsch Indië v. 7 (no. 3); ref. 16941] Tjibiliong, Banten Province, Java, Indonesia. Syntypes: RMNH 4768 (2 of 4). •Valid as Sicyopterus microcephalus (Bleeker 1855) -- (Talwar & Jhingran 1991:970 [ref. 20764], Kottelat et al. 1993:153 [ref. 23448], Larson & Murdy 2001:3603 [ref. 26293], Keith et al. 2012:301 [ref. 31972], Kottelat 2013:428 [ref. 32989], Keith et al. 2015:116 [ref. 34328], Miesen et al. 2016:95 [ref. 34492], Praveenraj et al. 2022:[9] [ref. 39577]). Current status: Valid as Sicyopterus microcephalus (Bleeker 1855). Gobiidae: Sicydiinae. Distribution: Eastern Indian Ocean and western Pacific [anadromous]: Sunda Islands (Indonesia). Habitat: freshwater, brackish, marine.