russulus, Gastromyzon Tan [H. H.] 2006:163, Pl. 16B; figs. 103-105 [The Borneo Suckers; ref. 28716] Enggeng (=Sungai) Bio, drains into Bahau River, up to 6 riffles upstream of field station, 2°52.58'N, 115°49.19'E, Bahau, Kayan basin, Kalimantan Timur, elevation 350 meters. Holotype: MZB 10702. Paratypes: RMNH 34802 (2); ZRC 47100 (2), 47101 (1), 47102 (1). •Valid as Gastromyzon russulus Tan 2006 -- (Kottelat 2012:64 [ref. 32367], Kottelat 2013:193 [ref. 32989]). Current status: Valid as Gastromyzon russulus Tan 2006. Gastromyzontidae. Distribution: Kayan and Mahakam River basins, Kalimantan Timur, Borneo, Indonesia. Habitat: freshwater.