Fig. 2

Evolutionary history of the number of visual opsins in 89 families of Insects (n = number of species for each family). Number of LW2b, LW2a, SW and UV opsins were averaged per family. Boxes are highlighted in red, green, blue and purple respectively for the LW2b, LW2a, SW and UV opsins when the average number of opsin per species within each group was higher than zero. Bold numbers indicate an average number of visual opsin per species ≥ 1. Families are highlighted or dashed in red when the presence of three ocelli in the adult stage was consistent or variable, respectively. The illustrated insect phylogeny (left) was manually coded following the insect phylogeny from Misof et al. [27]