bankanensis, Chaca Bleeker [P.] 1852:455 [Natuurkundig Tijdschrift voor Nederlandsch Indië v. 3 (no. 3); ref. 16828] Bangka, Indonesia. Holotype (unique): RMNH 5405 (poor condition). Bleeker specimens: BMNH 1863.12.4.117 (1). Type catalog: Ferraris 2007:135 [ref. 29155]. See van Oijen et al. 2009:282 [ref. 30423]. •Synonym of Chaca chaca (Hamilton 1822) -- (Menon 1999:263 [ref. 24904]). •Valid as Chaca bankanensis Bleeker 1852 -- (Brown & Ferraris 1988:1 [ref. 6806], Roberts 1989:143 [ref. 6439], Burgess 1989:152 [ref. 12860], Lim et al. 1990:47 [ref. 16753], Kottelat et al. 1993:78 [ref. 23448], Kottelat & Lim 1996:243 [ref. 23210], Ng & Tan 1999:362 [ref. 24159], Tan & Ng 1999:295 [ref. 24254], Kottelat & Widjanarti 2005:163 [ref. 28284], Ferraris 2007:135 [ref. 29155], Ng & Kottelat 2012:37 [ref. 31867], Kottelat 2013:240 [ref. 32989], Ng et al. 2019:529 [ref. 36606], Ahmad et al. 2023:96 [ref. 41243]). Current status: Valid as Chaca bankanensis Bleeker 1852. Chacidae. Distribution: Southeast Asia: Malaya (Malaysia), Sumatra (Indonesia), northern and western Borneo. IUCN (2020): Near Threatened. Habitat: freshwater.