Fig. 2. Phylogeny of insect, chelicerate and crustacean opsins based upon a maximum parsimony analysis of opsin amino acid sequences. Only representative species from available orders or sub-orders are shown. Brackets indicate measured (*) or inferred (
) spectral properties of the visual pigments (in bold type) in each clade. Inferred spectral properties are based upon in situ hybridization or immunohistochemistry in combination with electrophysiological studies. (The figure is reprinted from Chittka and Briscoe, 2001, with permission from Springer Verlag. The data are taken from several studies cited in the paper.)
