Figure 5 in Ultrastructure of the prosomal gland complex in unfed larvae of the fresh-water mite Limnesia maculata (Müller, 1776) (Acariformes, Limnesiidae)

Figure 5 Ventral podocephalic glands in unfed larvaeL. maculata.TEM. a – Compact ventral gland at the medial wall of the bladder of a coxal gland. Scale bar – 5 μm; b – Central portion of ventral gland. Note extensions of duct-forming cells flanking lacunas of the intra-alveolar lumen (arrows) and microvilli of these cells penetrating the lumen (arrowheads). Scale bar – 2 μm; c – Ventral gland on longitudinal section showing the intra-alveolar lumen. Note reinforcing bundles of fibrils within the electron-clear duct wall (arrows). Scale bar – 2 μm; d – Intra-alveolar lumen encompassed by duct-forming cells with short irregular microvilli (arrows) penetrating the lumen. Scale bar – 1 μm; e – Portion of the intra-alveolar lumen showing duct-forming cells contacting via septate junctions (arrows). Arrowheadsindicate microvilli of the duct-forming cells. Scale bar – 0.5µζ. bl – bladder; dfc – duct-forming cell; ey – eye; ial – intra-alveolar lumen; lg – lateral gland; m – mitochondria; ms – muscles; n – nucleus; nu – nucleolus; sg – secretory granules; vg – ventral gland.