Fig. 5

Putative sensory epithelia in the hyposphere of the scaphopod trochophore. Anterior faces up and ventral to the left in all aspects. See Fig. 4 for description of other expression domains of respective genes. The asterisk labels the mouth. a Dach is expressed in the region of the cerebral ganglia (cg), the pavilion (pv), the anterolateral and posterior foot (arrowhead), the posterior dorsal mantle region (arrows), and the lateral foot. b Two pax6+ flask-shaped cells are part of the lateral apical organ (black arrow) and two pax6+ cells are located in the posterior foot (white-lined arrowhead). c Rpgr is expressed in the trochoblasts of the prototroch and cells of the pavilion. d Eya is expressed in cells of the pavilion, the posterior ventral mantle (white-lined arrows), and the posterior foot (arrowhead). e MyoV+ cells are located in the ventral mantle (arrow) and the pavilion. f Six1/2+ cells are located in the posterior ventral mantle (arrow) and the posterior foot (arrowhead) as well as the inner pavilion. pt prototroch. Scale bars: 50 µm