Provisional checklist of freshwater fish diversity and distribution in Perak, Malaysia, and some latest taxonomic concerns Author Ng, Casey Keat Chuan Author Lim, Teow Yeong Author Ahmad, Amirrudin Author Khaironizam, Md Zain text Zootaxa 2019 2019-03-18 4567 3 515 545 journal article 28342 10.11646/zootaxa.4567.3.5 45397b0e-2315-410d-9640-3e8eb26fd613 1175-5326 2599047 08F8D9C4-EF4F-4D61-90B2-3C7B5E09A2A5 Channa aff. gachua (Hamilton 1822) Ophicephalus gachua : Herre & Myers, 1937 : 71 (River Plus, near Kuala Legap). Channa gachua : Ahmad et al ., 2014: 21 (Sungkai Wildlife Reserve); Ahmad & Zakaria-Ismail, 2014 : 415 (Sg. Purun; Sg. Tiang); Shafiq et al ., 2014 : 827 (Sg. Kurau); Authors' data (Lata Perahu; Pondok Tanjung; Sg. Ulu Kampar). Remarks. Channa gachua regularly cited in many papers may be erroneous according to Conte-Grand et al. (2017) . They propose that the species is involved in a complex of two widespread phylogenetic lineages. They advise that C. gachua should be used for describing specimens encountered in Bangladesh , India , Nepal , Sri Lanka and Myanmar ( Rakhine region) and C. limbata should be applied for specimens occurring in Myanmar towards Vietnam , southern China , Thailand , Peninsular Malaysia and Indonesia . Until further clarification emerges, our checklist adopts C. aff. gachua for specimens found in Perak.