Fig. 2From: Expression of NK genes that are not part of the NK cluster in the onychophoran Euperipatoides rowelli (Peripatopsidae)Expression of NK2.1 at consecutive developmental stages in embryos of the onychophoran E. rowelli. Anterior is up in a–c, e–g and left in d; developing limbs are numbered. a–c Expression in the head of consecutive developmental stages in ventral view (arrowheads). Arrow in A indicates an additional domain in the ventral midline of the head, asterisks in C point to the cerebral grooves. d Stage VI embryo in lateral view, dorsal is up. e Anterior trunk of a stage V embryo in ventral view. Asterisks indicate the expression in the ventral nerve cords. f Detail of a developing leg of the same embryo as in E in ventral view. Note the weak expression leading from the nerve cord into the leg (arrowhead). g Anterior trunk of a stage V embryo in ventral view. Asterisks indicate the expression in the ventral nerve cords. Abbreviations: cl, cephalic lobe; de, dorsal extra-embryonic tissue; jw, developing jaw; po, proctodeum; sp, developing slime papilla; st, stomodeum; ve, ventral extra-embryonic tissue. Scale bars: a, c, g: 100 μm; b, e, f: 200 μm; d: 500 μmBack to article page