FIGURE 15 in Structure and phylogenetic significance of the sternum V glands in Trichoptera 2884

FIGURE 15. Drawings based on wholemounts. The structures are viewed through the cuticle and anterior is to the left with down being mesal; thus all drawings show the left gland. Muscle fibres are grey and all structures are drawn as if they were transparent. Transparency of cuticle is not indicated. A–D: Limnephilidae: Limnephilinae. A and B: Limnephilus externus male and female, respectively. C and D: Pycnopsyche lepida female and male, respectively. Note the partial division of the gland reservoir into compartments in the male. The internal structures in female and male P. scabripennis are very similar to those in male P. lepida. Go, gland opening; Ip, insertion point for muscle; Op, origin point for muscle; Rs, gland reservoir; Sc, secretory cells; T-t, Trichoptera-type opening muscle.