dimorphicus, Barilius Tilak [R.] & Husain [A.] 1990:102, Figs. 1-4 [Journal of the Bombay Natural History Society v. 87 (pt 1); ref. 20095] Song River, eastern Doon Valley, Rajaji National Park, district Dehradun, Uttar Pradesh, India. Holotype: ZSI/NRS/F-728. Paratypes: ZSI/NRS F729 (5), ZSI/NRS F730 (7), ZSI/NRS F731 (2). See Das 2003:354 [ref. 27706] with second author Hussain. •Valid as Barilius dimorphicus Tilak & Husain 1990 -- (Menon 1999:17 [ref. 24904], Nath et al. 2010:24 [ref. 33488] with author as Husain, Disham & Vishwanath 2012:2363 [ref. 31817]). •Valid as Opsarius dimorphicus (Tilak & Husain 1990) -- (Qin et al. 2019:590 [ref. 36784], Kumari et al. 2024:8 [ref. 40818], Chowdhury et al. 2025:55 [ref. 41901]). Current status: Valid as Opsarius dimorphicus (Tilak & Husain 1990). Danionidae: Chedrinae. Distribution: South Asia: Song River drainage, Brahmaputra River basin, northern India. Habitat: freshwater.