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Fig. 6 | EvoDevo

Fig. 6

From: Spatiotemporal regulation of nervous system development in the annelid Capitella teleta

Fig. 6

Ct-ngn is expressed in the neuroectoderm. av Ct-ngn transcripts were detected in stage 3–6 animals using WMISH. Images are to the same scale as in Figs. 2 and 3. In (a) and (b), arrows indicate Ct-ngn + presumptive neural cells, while the white arrow points to presumptive non-neural Ct-ngn + cells on the animal side of embryos undergoing epiboly. In (b), the bracket indicates the position of the anterior neuroectoderm. Black arrowheads in panels (c), (e), and (f) denote expression in the pygidium. Arrowheads in (k) point to expression in the ventral neuroectoderm. White arrowheads in (n) indicate the position of lateral rows of Ct-ngn + ectodermal cells. The arrows in panels (s), (t), and (u) point to posteriorly localized expression that encompasses the PGZ. The arrowheads in panels (s), (t), and (v) point to expression in the ventral neuroectoderm. Black arrowheads in (u) point to a row of Ct-ngn + dorsolateral ectodermal cells. The white arrowhead in (v) points to expression in the ventrolateral ectoderm, while the line denotes the position of the ventral midline. In each panel, the stage of the animal is indicated in the lower left, and the view is indicated in the lower right (lat lateral, vlat ventrolateral, vent ventral, ant anterior). In all lateral and ventrolateral views, anterior is to the left and ventral down; in all ventral views, anterior is to the left; in all anterior views, ventral is down. Panels (h), (m), and (r) are cropped images of the episphere from a ventral view. Panels (j) and (o) are cropped images of the episphere from a ventrolateral view. An asterisk marks the position of the mouth, and the prototroch (pt) and telotroch (tt) are labeled with dashes. In panels (h) and (r), dashes mark the prototroch. ST3epi, stage 3 epiboly; STBPclg, stage 3 blastopore closing; ST3mo, stage 3 mouth

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