Figure 5 in Five invaginations and shedding of the larval epidermis during development of the hoplonemertean Pantinonemertes californiensis (Nemertea: Hoplonemertea)

Figure 5. Confocal micrographs of the late rudiment stage larvae of Pantinonemertes californiensis (3-day-old at 15–16◦C) labelled with phalloidin. This is the stage at which the larvae shed larval epidermal cells; apical is up. (A) A 10-µm sub-stack of frontal sections showing well-developed body wall muscles, the bipartite proboscis (pb) equipped with a muscle retractor (prm) and the dorsal commissure of the brain (dc); (B) a 5-µm sub-stack of frontal sections of a different larva showing the ventral commissure of the brain (vc), the lateral nerve cords (lnc) with the associated nerve cord muscles (nm), and proboscis insertion muscles (pim); (C) a 6.5-µm sub-stack of frontal sections of yet another larva showing the fused foregut (fgt) and midgut (mgt), and the proboscis pore (pp).