Fig. 12

Schematic overview over gene expression of MMFs in the legs of the onychophoran Euperipatoides kanangrensis. a Expression patterns of dally, dlp, and shf in correlation to expression of wg in the tips of the limbs, and engrailed/hedgehog (en/hh) expressing tissue. Depicted are the legs in ventral view (top) and in cross section (bottom). In the latter, the outer ring represents ectoderm, the middle ring represents mesoderm and the inner ring represents the wg-expressing tip of the leg. Dorsal (D), ventral (V), anterior (A) and posterior (P) are indicated. The dashed line in the ventral view on a leg expressing shf indicates the mesoderm. b Summary of gene expression of dally, dlp and shf in a given leg, cross section. The arrows mark suggested direction of Wg morphogen travelling in the dally-corridor. c Expression of Frizzled receptors in comparison to wg expression. The arrows mark suggested direction of Wg morphogen travelling in the dally-corridor; note that fz3 is expressed in this corridor as well, while other Fz genes are not