macronotacanthus, Arius Bleeker [P.] 1846:32 [159] [Verhandelingen van het Bataviaasch Genootschap van Kunsten en Wetenschappen. v. 21 (art. 5); ref. 313] Jakarta, Java, Indonesia. Holotype (unique): RMNH 6901. Bleeker specimens: BMNH 1863.12.4.59 (1). Type catalog: Ferraris 2007:47 [ref. 29155]. Appeared later in Bleeker 1846:159 [ref. 5872]. See van Oijen et al. 2009:91 [ref. 30423] as macronothacanthus. •Valid as Tachysurus macronotacanthus (Bleeker 1846) -- (Jayaram & Dhanze 1979:48 [ref. 6800]). •Questionably a synonym of Arius caelatus Valenciennes 1840 -- (Kottelat et al. 1993:79 [ref. 23448], Tan & Ng 1999:295 [ref. 24254]). •Valid as Nemapteryx macronotacanthus (Bleeker 1846) -- (Kailola 2004:139 [ref. 28108]). •Valid as Nemapteryx macronotacantha (Bleeker 1846) -- (Ferraris 2007:46-47 [ref. 29155], Kottelat 2013:249 [ref. 32989], Habib & Islam 2020:Supplementary table p. 8 [ref. 38321]). •Valid as Arius macronotacanthus Bleeker 1846 -- (Burgess 1989:169 [ref. 12860], Kailola 1999:1853 [ref. 24732], Kailola in Randall & Lim 2000:589 [ref. 25122], Ng 2003:10 [ref. 27208], Marceniuk & Menezes 2007:18 [ref. 29031], Kailola 2022:188 [ref. 39697], Marceniuk et al. 2023:29 [ref. 40422]). Current status: Valid as Arius macronotacanthus Bleeker 1846. Ariidae: Ariinae. Distribution: Indo-West Pacific, South Asia, Southeast Asia: India, Singapore, Thailand, Malaysia and Indonesia. Habitat: freshwater, brackish.