Fig. 8
Expression of NK6.1 at late developmental stages in embryos of the onychophoran E. rowelli. Anterior is up in A and B; developing legs are numbered. Developing nerve cord is indicated with dashed lines and the neuropil with asterisks in C–D′. A Head of stage IV embryo in ventral view. Signals in the ventral ectodermal thickenings and ventral nerve cords are indicated with asterisks and arrowheads, respectively. B Head of stage V embryo in ventrolateral view. Note the expression in the developing antennae (empty arrowheads) and the ventral nerve cords (filled arrowheads). C Cross section of a stage IV embryo showing the segmental expression in the ventral ectodermal thickenings. Arrowheads point to the expression in the ventral ectoderm and developing nerve cords. D Cross section of the interpedal region of a stage IV embryo. Arrowhead points to the expression in the developing nerve cords. C′ and D′ show DAPI staining of the same cross section as in C and D, respectively. Abbreviations: at, developing antenna; cl, cephalic lobe; sp, developing slime papilla. Scale bars: A, B: 200 µm; C–D′: 50 µm