ridens, Gastromyzon Roberts [T. R.] 1982:515, Fig. 14 [Proceedings of the California Academy of Sciences (Series 4) v. 42 (no. 20); ref. 6689] Sungai Pinoh, 20-60 kilometers upstream from Nangapinoh, Kapuas basin, Borneo, Indonesia,. Holotype: MZB 4355. Paratypes: BMNH 1982.3.29.113 (1), 1893.3.6.270-275 (6), CAS 49322 (2), FMNH 94228 (1), MNHN 1982-0691 (1), RMNH 28864 (1), CAS-SU 32378 (9), USNM 230249 (2 not 1). Type catalog: Ibarra & Stewart 1987:38 [ref. 12367]. •Valid as Gastromyzon ridens Roberts 1982 -- (Roberts 1989:88 [ref. 6439], Kottelat et al. 1993:52 [ref. 23448], Kottelat & Lim 1996:235 [ref. 23210], Doi 1997:19 [ref. 22832], Tan & Martin-Smith 1998:366 [ref. 23646], Rachmatika 1998:656 [ref. 23901], Tan & Leh 2006:9 [ref. 28497], Tan 2006:132 [ref. 28716], Kottelat 2012:64 [ref. 32367], Kottelat 2013:193 [ref. 32989]). Current status: Valid as Gastromyzon ridens Roberts 1982. Gastromyzontidae. Distribution: Borneo, Indonesia. Habitat: freshwater.