Figure 5

Adolescens I. A, B: live specimens in mineral oil, dorsal view; C-H: unfixed specimens viewed at the compound microscope with Nomarski optics, ventral view. A: adolescens I, showing typical torsion movements, viewed on white background to highlight the tanning of the head cuticle (h) and maxilliped/forcipular segment (fs) and intensity of yolk pink pigment associated with the mid-gut. B: specimen showing relative extension of foregut (fg) and hindgut (hg). C: high magnification of the head, showing complete differentiation of the gnathal limbs: first maxillae (mx1), second maxillae (mx2t: telopodite of the second maxillae) and forcipules/maxillipeds (mxp). D: in addition to the coxosternite (cs in C) the forcipule appears to be composed of additional 5 articles (1–5) (see text for details); E: middle focal plane of a forcipule showing venom duct (vd) and venom gland (vg); F: high magnification of the antennae covered by setae (arrowheads) and, on the last antennomere, also by basiconic sensilla (white arrows in the high magnification insert); muscle fibres are visible along the main axis (red arrows); G: high magnification of the terminal segments of a female, showing the sternites of the last LBS (ls) and of the first (gs1) and second genital segment (gs2), followed by the anal valves (av); appearance on the surface of the coxal pore (cp) canal is an artefact of focal planes stacking; H: high magnification of mid trunk, viewed at different focal planes, progressively away from the viewer (H1, H2, H3); H1: surface focal plane, with metasternite (ms), presternite (ps), metacoxa (mc) and procoxa (pc); H2: focal plane just under the surface with double nerve cord (nc) and ganglia (g); H3: focal plane just below the dorsal surface, with heart (ht) and tracheae (tr). Scale bars: A, B: 500 μm; C, F-H: 100 μm; D-E: 50 μm.