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Figure 5 | EvoDevo

Figure 5

From: How the pilidium larva grows

Figure 5

Clusters of small uniciliate cells in the axils of the pilidium. All: anterior left, apical up; la = lappet, cb = ciliary band. (A-C) Three-week-old pilidium of M. alaskensis (two to three pairs of discs stage): anterior axil (A), overview (B), and posterior axil (C). Dashed circle indicates a cluster of approximately ten small, apparently non-ciliated cells. (D) Peering under the larval hat-brim, as it were, reveals that each outer axillary patch is matched by an equivalent inner patch; this instance shows the posterior axils, outer (left) and inner (right). (E,F) Higher-magnification views of outer posterior (E) and inner anterior (F) axils. Color highlighting shows those cells which lack motile cilia and appear to have each a single, very short ciliary rudiment (arrowheads). Highlighting may have missed some axillary cells in which the ciliary rudiment was absent or invisible. Question mark indicates a curled cilium borne by a cell with a small apex that also emits numerous long tendrils across the epithelium. One or a few of these curious cells are present near or within each outer axil.

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