Fig. 4

Anatomy of walking leg 10 and ultimate leg. a 3D volume rendering of walking leg 10 and musculature, microCT analysis. Note that muscles labeled in bold either exhibit differences to ultimate leg muscles (m40 and m41, compare b) or are absent in the ultimate leg (m37). b 3D volume rendering of ultimate leg and musculature, microCT analysis. Note that muscles labeled in bold exhibit differences to walking leg 10 (compare a). c Detail of ultimate leg tibia showing ventrolaterad displacement of the claw tendon (td1), nerve N4, and muscle m48 by the tissue of the telopodal glands (teg). d Ultimate leg articulation of tarsus 1 and 2 with N4 branching in the proximal part of tarsus 2. Pores of telopodal glands are detectable in this visualization. e Tibio-tarsal articulation of the ultimate leg showing the branching of N4 in the proximal tarsus 1. Tarsus 1 houses a presumptive second tendon (td2?) supplied by a single muscle head from m48. f Right ultimate leg coxa from ventral. Note that the levator and depressor muscles m40 and m41 are substantially enlarged (compare a). Abbreviations: cl claw, cx coxa, fe femur, li connective tissue ligament, m muscle. N nerve, pfe prefemur, ta tarsus, td1 claw tendon, td tendon, teg telopodal gland tissue, ti tibia, tr trochanter