acutirostris, Arius Day [F.] 1877:459, Pl. 107 (fig. 1) [The fishes of India Part 3; ref. 4886] Salween River at Moulmein, Myanmar. Syntypes and/or Day specimens: AMS B.7733 (1, non-type) Irrawaddy; BMNH 1870.6.14.34 (1); NMW 44358 (1), 48327 (1); ZMB 2735 (1); ZSI F454 (1), F500 (1), A.569 (13). Type catalog: Whitehead & Talwar 1976:158 [ref. 23762], Ferraris et al. 2000:294 [ref. 25110], Ferraris 2007:31 [ref. 29155]. •Valid as Tachysurus acutirostris (Day 1877) -- (Jayaram & Dhanze 1979:48 [ref. 6800]). •Valid as incertae sedis cf. Arius acutirostris Day 1877 -- (Kailola 2004:145 [ref. 28108]). •Incertae sedis in Ariidae -- (Ferraris 2007:31 [ref. 29155]). •Valid as Arius acutirostris Day 1877 -- (Burgess 1989:168 [ref. 12860], Talwar & Jhingran 1991:699 [ref. 20764], Jayaram 2006:336 [ref. 28762], Marceniuk & Menezes 2007:14 [ref. 29031], Kottelat 2013:246 [ref. 32989], Marceniuk et al. 2023:27 [ref. 40422]). Current status: Valid as Arius acutirostris Day 1877. Ariidae: Ariinae. Distribution: Southeast Asia: Salween River drainage, Myanmar. Habitat: freshwater, brackish.