Fig. 1

Phylogenetic analysis of homeodomain genes and FoxQ2. Species abbreviations: Ek, Euperipatoides kanangrensis (Onychophora); Dm, Drosophila melanogaster (Hexapoda: Diptera); Gm, Glomeris marginata (Myriapoda: Diplopoda) Tc, Tribolium castaneum (Hexapoda: Coleoptera); Sm, Strigamia maritima (Myriapoda: Chilopoda). Gene abbreviations: al, aristaless; Fox, forkhead box gene; rx, retinal homeobox; scro, scarecrow; vnd, ventral nervous system defective; vsx, visual system homeobox. See text for further information