Fig. 4
From: Morphological responses to feeding in ticks (Ixodes ricinus)
Ixodes ricinus, electron microscopic micrographs of the cuticle. a TEM of the cuticle of a fasting female. The image shows the transition between scutum (left) and alloscutum (right). b SEM of the transition from scutum (left) to alloscutum (right) of a fasting female. c SEM of the cuticle of the alloscutum of a fasting female; close-up of the cuticular folds. d TEM of the alloscutum of a fasting female. e TEM of the cuticle of a fully engorged female. Abbreviations: AS, alloscutum; C, pore canal; CF, cuticular folds; CS, cuticular sensilla; EN, endocuticle; EPC, epicuticle; EPD, epidermis; EX, exocuticle; Nepd, nuclei of epidermal cells; PC, procuticle; S, scutum; T, trachea