Morphology, ultrastructure and function of the sternal gland in two mason bee species (Osmia bicornis and O. cornuta)
Fig 2
Histology of sternal gland cells.
A basal section with basal lamina; B apical section with microvilli, arrows indicate ATER-system; C schematic overview; D pore canal in the cuticle, E recessed external surface over a pore canal; F inner surface of the gland cuticle, arrows indicate pore canals; G transection through the base of a setae with pore; bl = basal lamina, c = cuticle, fl = feltwork, g = Golgi apparatus, m = mitochondria, mv = microvilli, n = nucleus, pc = pore canal, rER = rough endoplasmatic reticulum, sc = setal canal, sj = septate junctions, v = vesicles.