Fig. 2
From: Panarthropod tiptop/teashirt and spalt orthologs and their potential role as “trunk”-selector genes
Expression of tiptop/teashirt (tio/tsh) in Glomeris (A–D), Euperipatoides (E–G), and Parasteatoda (H–O). In all panels, anterior is to the left except for panels J and L (anterior up). All panels show ventral views, except for E–G, I–K (lateral views). E´–G´, I´, and M´–O´ represent DAPI staining of the embryos shown in the corresponding panels. Arrows in A–G and I–K point to the anterior border of expression. Note that there is no expression anterior to that, except for some staining in the nervous system (filled circles in B, C, and arrow in L). The asterisk in panel H marks the centre of the germ disc, the future posterior pole of the embryo. Asterisks in I, J mark expression in the posterior of the SAZ. ch chelicera, hl head lobe, j jaw, L1 first walking-limb bearing segment, md mandible, mx maxilla, O1 first opisthosomal segment, pmx postmaxillary segment, pp pedipalp, SAZ segment addition zone, sp slime papilla, T1 first trunk segment