Fig. 3

Fate of the 1q¹² cells in the pilidium. The four middle panels show labeled domains (yellow) overlaying transmitted-light images (gray), for orientation. Peripheral panels show corresponding labeled domains alone, for clarity. Apical organ is up on all panels. Main panels in the top row (A, D) show pilidia imaged from the left side (anterior lobe to the left); main panels in the bottom row (B, C) show views from the right side (anterior lobe to the right). A Contribution of the 1a¹² cell: primary ciliary band of left lappet (solid arrowhead), left-side episphere, including tile cells and foam cells (open arrowhead). B Contribution of the 1b¹² cell: primary ciliary band of right lappet and anterior lobe (solid arrowhead), anterior episphere, including tile cells and foam cells (open arrowhead), and anterior right axil. Inset shows axillary region in a projection of a 1.8-μm-thick sub-stack of the same larva at the same scale, but with intensity values log-transformed to make dim background visible. The black gap in the labeled domain presumably corresponds to the contribution from 1a². Note a labeled nerve. C Contribution of the 1c² cell: primary ciliary band of right lappet (solid arrowhead), right-side episphere, including tile cells and foam cells (open arrowhead). D Contribution of the 1d² cell: primary ciliary band (solid arrowhead) and episphere of posterior lobe, including tile cells and foam cells (open arrowhead). D′ The same larva (0.5×) as D imaged from the right side. Scale bar 50 μm