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Fig. 2 | Frontiers in Zoology

Fig. 2

From: When SEM becomes a deceptive tool of analysis: the unexpected discovery of epidermal glands with stalked ducts on the ultimate legs of geophilomorph centipedes

Fig. 2

SEM analysis of the ultimate legs of male Haplophilus subterraneus. a Posterior trunk from ventral. Note the size and insertion of ultimate legs in comparison to locomotory legs. The enlarged coxae bear several coxal pores. b Ultimate legs in ventrolateral view. Medial sides exhibit far less stalked ducts from epidermal glands then lateral and dorsal sides. c Lateral side of male ultimate leg (different specimen then (a and b)). Stalked ducts of epidermal glands and trichoid sensilla cover the whole surface. d Magnification of the tibia. Trichoid sensilla are highlighted in blue and noticeable by their characteristic socket (compare Fig. 4b) and a lower angle to the leg cuticle. e Stalked duct of an epidermal gland. Note the characteristic round socket that is completely encompassed by scutes (epidermal cell profiles), and the large terminal pore. f Stalked duct broken off slightly above the socket region. Note the duct visible as central canal surrounded by the stalk wall cuticle, and also the round socket. Abbreviations: cxp coxal pores, fe femur, gp gonopods, ll locomotory leg, pfe prefemur, ste sternite, ta1 tarsus 1, ta2 tarsus 2, ti tibia, ul ultimate leg

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