FIGURE 22 in Structure and phylogenetic significance of the sternum V glands in Trichoptera 2884

FIGURE 22. SEMs of external structures. A–D: Hydrobiosidae. A–C: Apsilochorema segitiga female. A: Overview of gland opening, connecting groove and ventral protuberance with stout setae. B: Close-up of gland opening, note how the direction of the microtrichia would guide gland products towards the groove. C: Close-up of setae of ventral protuberance, note the wear on the setae, indicating that the protuberance is dragged along the substrate. D: Atopsyche callosa male, protuberance with gland opening. E, F: Rhyacophila arnaudi (Rhyacophilidae). E: Female, protuberance with gland opening and setae. F: Male, part of protuberance with gland opening and setae. Go, gland opening. Scale bars: A, E = 100 µm; B–D, F = 10 µm.