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Fig. 6 | Frontiers in Zoology

Fig. 6

From: Nervous system development in lecithotrophic larval and juvenile stages of the annelid Capitella teleta

Fig. 6

FMRF-LIR in late-stage C. teleta larvae (stages 7 – 9). Images are z-stack confocal images of larvae labeled with anti-FMRF (red) and Hoechst nuclear stain (green). Panels labeled with an apostrophe (e.g., a') are single-channel images of FMRF-LIR from the merged image without an apostrophe (e.g., a). Panels c and d are cropped images of the head. The open arrow in a’, b’, e’, f’ points to F-AMC. The position of the prototroch (pt) is indicated in c, d, e, f, g and h, while the telotroch (tt) is indicated in e, f, g and h. Open arrowheads in c’ mark left-lateral clusters of neurons near the pharynx. Closed arrowheads in c’ and d’ point to flask-shaped cells that are positioned on the ventral side of the larva, just anterior to the prototroch. In d’, the open arrowhead points to a single cell with FMRF-LIR that is just ventral to the pharynx, and the closed arrows point to neurite bundles extending from the dorsal cluster of neurons with FMRF-LIR near the pharynx. In G’ open arrowheads indicate two of the segmentally-iterated dorsal trunk neurites positioned between the mesoderm and endoderm, and the open arrow points to a posterior cell in the pygidium. Stage is indicated in the lower-left corner, and view is indicated in the lower-right corner. All lateral views are of the left side. Anterior is to the left in all ventral and lateral views, and ventral is down in all anterior views. ant, anterior; lat, lateral; pt, prototroch; tt, telotroch; vent, ventral

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