Fig. 2From: Comparative analysis of gene expression patterns in the arthropod labrum and the onychophoran frontal appendages, and its implications for the arthropod head problemExpression of hbn and FoxQ2. In all panels anterior is to the left. Ventral view, if not indicated otherwise. a–d Euperipatoides hbn. a, c Lateral view. d Dorsal view. Arrows point to expression in the frontal appendages. e, f Glomeris hbn. g, h Euperipatoides FoxQ2. Arrowhead marks expression between the jaw and the slime papilla. i, j Glomeris FoxQ2. lr primordium of the labrum, hl head lobe, j jaw, lr labrum, m mouth, md mandible, sp lime papillaBack to article page