Figure 3.

Fluorescent neuromast labelling in Sinocyclocheilus groups demonstrating three distinct eye morphologies. A representative eyeless species, S. furcodorsalis (Clade B from Guangxi), shown in the dorsal (a), left-lateral (b) and right-lateral (c) aspects. This species demonstrates absolute asymmetry of head neuromasts (biased to the right side), which are sparsely distributed. A representative micro-eyed species, S. microphthalmus (Clade B from Guangxi), shown in the dorsal (d), left-lateral (e) and right-lateral (f) aspects. S. microphthalmus demonstrates slight asymmetry (biased to the left side) of head neuromasts, which are sparsely distributed. A representative normal-eyed species, S. oxycephalus (Clade D from Yunnan), shown in the dorsal (g), left-lateral (h) and right-lateral (i) aspects. This species demonstrates slight asymmetry (biased to the right side) of head neuromasts, which are densely distributed. Yellow dotted line around head represent the area under consideration, solid white cycles show the eye ball and the white cycles show the eye orbit. Scale = 1 mm. (Online version in colour.)