Fig. 8

Cellular organization of three types of epidermal glands common in the glandular epithelium of the ultimate leg of Haplophilus subterraneus in longitudinal view. The proximal part of the stalked duct/gland is cut longitudinally, whereas its distal and median parts are shown in full to demonstrate the terminal (gland) pore (gp) and secretion discharged the remains of which potentially establish the extremely electron-dense outer layer (sl). Secretory cells of neighboring epidermal glands with stalked ducts are sketched without detail illustration of cytoplasmic content. Abbreviations: at atrium, bl basal labyrinth, cc canal cell, cu leg cuticle, du duct, ecm extracellular matrix, epc interstitial epidermal cells, gr secretory granule, ic intermediary cell, il inner fibrous layer, in cuticular intima, ml median lamellated layer, pmv palisade-like formation of microvilli, res reservoir, sc secretory cell