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Fig. 6 | Zoological Letters

Fig. 6

From: Structure, function and cell dynamics during chaetogenesis of abdominal uncini in Sabellaria alveolata (Sabellariidae, Annelida)

Fig. 6

ac TEM images of A1–3 showing the initial stage of chaetogenesis and the formation of a rostrum. Inset high magnification of a diplosome d Production of chaetal material and the subsequent transportation to the chaetal anlage via vesicles. e Formation of the adrostral teeth in B2. f TEM image of the formative site showing the formation of teeth in B3 with multiple rows of microvilli, older teeth in C with almost completely filled canals and the adrostral portion of the chaeta in F. F1–F3 follicle cells, CB chaetoblast, arrow heads mark the adluminal adherens junctions, short arrows mark centrioles, long arrows mark vesicles containing electron-dense chaetal material, ECM extra-cellular matrix, ab actin bundles, mv microvilli, e enamel, gs golgi stack

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