FIGURE 17 in Structure and phylogenetic significance of the sternum V glands in Trichoptera 2884

FIGURE 17. 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. Cross hatching shows the presence and position of thickened cuticular ridges. A: Olinga feredayi (Conoesucidae) female. Note the single muscle fibre (RT-t) originating laterally on cuticle of sternum V and inserting on the gland duct. B: Austrocentrus griseus (Helicophidae) female. C: Philanisus plebeius (Chathamiidae) female. Note the bundle of muscle fibres (RT-t) originating laterally on cuticle of sternum V and inserting on the gland duct. D: Contulma talamanca (Anomalopsychidae) female. 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; RT-t, reverse Trichoptera-type opening muscle.