Fig. 6.

Eye homology in the Ecdysozoa. (A) Cartoon of Drosophila melanogaster with the ocelli (green arrowheads) and compound eyes (blue arrowhead) identified. (B) Cartoon of the jumping spider. The green arrowhead identifies the principal eye, homologous to the Drosophila ocelli; the blue arrowhead identifies the secondary eyes, homologous to the Drosophila compound eye. (C) Combinatorial gene expression in the developing principal [anterior median eye (AM)] and secondary eyes [posterior median (PM)], [anterior lateral (AL)] and [posterior lateral (PL)] in two species of spider, P. tepidariorum and C. salei, as reported by Samadi et al. (2015) and Schomburg et al. (2015).