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Fig. 7 | BMC Zoology

Fig. 7

From: Ultrastructure and functional morphology of the appendages in the reef-building sedentary polychaete Sabellaria alveolata (Annelida, Sedentaria, Sabellida)

Fig. 7

S. alveolata. Branchiae, SEM images. a Two mid-body branchiae from abdomen (10th, 11th branchia; br10, br11), anterior up, dorsal to the left, each branchia with specific pattern of cilia: two straight and somewhat discontinuous bands (scb) situated on the outward facing side following the longitudinal axis of branchia, anterior row of cilia giving rise to semicircular curved bands (ccb) facing the medial side of branchia, boxed area enlarged in (c, b) View from medial side showing curved ciliary bands (ccb) and straight band (scb) with groups of receptor cell cilia in between (boxed and enlarged in (d), c End of outer straight ciliary band (scb), arrows point to various tufts of receptor cell cilia, d Enlargement of the three groups of sensory cell cilia from b, rough surface is represented by tips of epidermal microvilli, e Single tuft of sensory cilia at high magnification, tips of microvilli create “rough” appearance of surface. Abbreviations: br - branchia, ccb - curved ciliary band, scb - straight ciliary band, not - notopodium

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