fluviatilis, Callionymus Day [F.] 1876:322 [The fishes of India Part 2; ref. 1081] Hooghly River at Calcutta, India. Syntypes and/or Day specimens: BMNH 1889.2.1.3557-3564 (8); NMW 76840 (1); 76490 (1); RMNH 4874 (1); ZSI F2083-84 (2). Type catalog: Whitehead & Talwar 1976:161 [ref. 23762]. •Synonym of Callionymus melanotopterus Bleeker 1851 -- (Fricke 1982:63 [ref. 5432]). •Valid as Repomucenus fluviatilis (Day 1876) -- (Kottelat 2013:386 [ref. 32989]). •Valid as Callionymus fluviatilis Day 1876 -- (Fricke 1983:142 [ref. 8349], Talwar & Jhingran 1991:916 [ref. 20764], Rainboth 1996:193 [ref. 22772], Bijukumar & Sushama 2000:187 [ref. 25703], Fricke 2001:3558 [ref. 26292] dated 1875, Fricke 2002:21 [ref. 26547], Ng & Rainboth 2011:67 [ref. 31577], Roy et al. 2021:215 [ref. 38220]). Current status: Valid as Callionymus fluviatilis Day 1876. Callionymidae. Distribution: Indo-West Pacific. Habitat: freshwater, brackish, marine.