Figure 4 Overview of ultraviolet- (UV) wavelength sensitivesws1 opsin gene evolution, gene expression and UV patterns in the
eleven species of damselfish investigated. From the left: damselfish
species tree, with the suggested timeline of gene duplication, loss, and
gene conversion (double arrow); expression at any developmental stage ofsws1 in the retina; presence at any developmental stage of
complex UV patterns; and relative sws1 opsin expression in adult
specimen (see Table 1 for detailed opsin gene expression data). Note
that the sws1 duplication likely occurred in the Pomacentrinae
ancestor, and the sws1β copy was lost in the ancestor of the
Cheiloprionini tribe. Gene conversion occurred between theNeoglyphidodon melas sws1 copies (see Fig. S2 for details). The
damselfish phylogeny was modified from McCord et al. , 2021.