filamentus, Macrones (Hemibagrus) Fang [P.-W.] & Chaux [J.] in Chaux & Fang 1949:200, Fig. 4 [Bulletin du Muséum National d'Histoire Naturelle (Série 2) v. 21 (no. 2); ref. 13004] Cambodia. Holotype (unique): MNHN 1966-0728. Type catalog: Ferraris 2007:88 [ref. 29155]. •Questionably a synonym of Mystus nemurus (Valenciennes 1840) -- (Roberts 1989:122 [ref. 6439]). •Valid as Mystus filamentus (Fang & Chaux 1949) -- (Rainboth 1996:141 [ref. 22772]). •Valid as Hemibagrus filamentus (Fang & Chaux 1949) -- (Ng & Rainboth 1999:557 [ref. 24608], Kottelat 2001:122 [ref. 25780], Ferraris 2007:88 [ref. 29155], Ng & Kottelat 2013:238 [ref. 32495], Kottelat 2013:258 [ref. 32989], Kottelat 2015:46 [ref. 33971], Taki et al. 2021:290 [ref. 39830]). Current status: Valid as Hemibagrus filamentus (Fang & Chaux 1949). Bagridae. Distribution: Southeast Asia: Mekong River basin, Laos, Thailand, Cambodia and Vietnam. Habitat: freshwater.