Figure 14

Expression patterns of Pdu-Hes12 and their schematic representations in Platynereis larvae and during posterior elongation (PE). Whole-mount in situ hybridization (WMISH) for the different stages indicated on each panel is shown. At 33 h post fertilization (hpf), Pdu-Hes12 is expressed in two large lateral patches that become restricted in a weak expression in the ventral nerve cord (VNC) and around the stomodeum at 48 hpf. At this stage, as well as during PE, this gene is also expressed in a single cell at the bottom of each chaetal sac. An expression in the stomodeum is also evidenced at 48 and 72 hpf. Panels are ventral views (anterior is up) for the larvae and during PE. Deeper ventral view (different focus plane) is highlighted in red for 48-hpf larvae.