Fig. 4

Geophylogeny, the phylogeny laid across the geographic distribution of the species considered in the analysis, with habitats (a), eye-related morphs (b) and horn-existence (c). A pattern where early-diverging, Normal-eyed, Troglobitic species are placed in the east, predominantly Blind/Micro-eyed/Normal-eyed, Troglobitic species in the center and Normal-eyed, Surface dwelling species towards the western mountains is evident, indicating an east to west dispersion of the genus Sinocyclocheilus across South and South western China. Eye specializations mostly occurred in Clade B, and horn evolution occurred exclusively in Clade B, within the Central range of the Sinocyclocheilus distribution. [Vector files were obtained from a public domain map data at http://naturalearthdata.com]