griseum, Sicydium Day [F.] 1877:140 [The Journal of the Linnean Society of London. Zoology v. 13 (no. 67); ref. 14240] South Canara, India. Syntypes and/or Day specimens: (2) AMS B.8254 (1, syntype), ZSI 2474 (1). Type catalog: Whitehead & Talwar 1976:161 [ref. 23762], Ferraris et al. 2000:297 [ref. 25110]. •Valid as Sicyopterus griseus (Day 1877) -- (Pethiyagoda 1991:251 [ref. 20075], Talwar & Jhingran 1991:969 [ref. 20764], Biju et al. 1998:351 [ref. 24982], Menon 1999:295 [ref. 24904], Bijukumar & Sushama 2000:187 [ref. 25703], Raju Thomas et al. 2002:51 [ref. 26359], Manilo & Bogorodsky 2003:S118 [ref. 27377], Keith et al. 2015:96 [ref. 34328], Parenti 2021:418 [ref. 38603], Praveenraj et al. 2022:[9] [ref. 39577]). Current status: Valid as Sicyopterus griseus (Day 1877). Oxudercidae: Sicydiinae. Distribution: Indian Ocean: India and Sri Lanka. Habitat: freshwater, brackish, marine.