Fig. 3

Expression patterns of aristaless (al) and clawless (cll) at different stages of the eutardigrade Hypsibius exemplaris limb development. A, B Stage 14. C Stage 16. D Stage 17. A, B, B*, C, D cll expression. A’, C’, D’ al and cll expression. Figures with the same letter indicates the same embryo viewed in similar optical sections; with asterisk (*) indicate the same embryo but viewed at different optical sections. Embryos are in lateral view and facing right in all panels, except for B and B*, which are in dorsoventral mount. Roman numeral number indicates leg number (e.g., I—1st pair of legs). Nuclei are labeled with DAPI (Gray)