Fig. 6

Expression of Tribolium, Glomeris and Euperipatoides SoxD. In all panels, anterior is to the left. All panels, ventral views, except for panels l and n (lateral views). a-d Expression of Tribolium SoxD. e-h Expression of Glomeris SoxD. i-n Expression of Euperipatoides SoxD. Developmental stages are indicated for Tribolium (after Strobl and Stelzer [27]), Glomeris (after Janssen et al. [26]), and Euperipatoides (after Janssen and Budd [23]). Arrowheads in panels a and b point to expression in the anterior head. Asterisks in panels c and d mark expression in the ventral midline. Asterisk in panel h mark two domains of expression in a diplosegmental dorsal unit (cf. Janssen [32]). The inlay in panel g shows expression in the SAZ and the anal valves. Arrows in panels i to m mark transverse segmental stripes of expression. Abbreviations as in Fig. 2, and T1, first trunk segment