FIGURE 2 in A new species of Barbatula from the headwaters of the Bulgan River in western Mongolia (Teleostei: Nemacheilidae)

FIGURE 2. Mouth of: a, B. cf. altayensis, ZMMU 23828, 123 mm SL, Mongolia: headwaters of Bulgan River; b, B. golubtsovi, ZIN 52252, 130 mm SL, Russia: Chedi-Tey River; c, B. compressirostris, IEE uncatalogued, 117 mm SL, Mongolia: Zhalantyin-Gol River. (1) lateral lobes of lower lip absent; (2) lateral lobes of lower lip present; (3) mental lobes of lower lip poorly defined and furrowed; (4) mental lobes of lower lip with conical protrusions; (5) mental lobes of lower lip well-delimited, oval and smooth; (6) slight medial incision of upper lip; (7) furrows of lips; (8) strong medial incision of upper lip; (9) medial incision of upper lip absent. Scale bar (common): 5 mm.