Fig. 1From: Comparative analysis of gene expression patterns in the arthropod labrum and the onychophoran frontal appendages, and its implications for the arthropod head problemPhylogenetic 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 informationBack to article page