Fig. 2

Temporal patterns of body size and eye diameter evolution and the other three traits (Horn, Habitat, Eye-related morphs) against standard lengths as phylomorphospace-traitgrams in Sinocyclocheilus. The traitgrams suggests that the evolution of different morphs is attained by altering the allometric relationships between body size and eye diameter. a Traitgram of body size; b Traitgram of eye size; c Eye related morphs traced on the phylomorphospace indicating clear separation of the three morphs in the morphospace. d Habitat associations traced on the phylomorphospace showing species having eye diameter < 3 mm and small to medium body sizes are obligate cave dwellers whereas species with eye diameter ≥ 3 mm can be Troglobitic, Troglophilic or Surface dwellers regardless of their body size. e Horn related morphs traced on the phylomorphospace indicating the presence of a horn in smaller blind fish and smaller fish with reduced eye size. Horned species are all Troglobites