FIGURE 24 in Structure and phylogenetic significance of the sternum V glands in Trichoptera 2884

FIGURE 24. SEMs of external structures. A, B: Brachycentrus occidentalis (Brachycentridae), male and female very similar. A: Female, hexagons with grooves in between covering sternum V. B: Male, gland opening connecting with grooves between hexagons. C, D: Phryganeidae. C: Yphria californica male, gland opening in bald, slightly raised area. Female similar, but bald area not raised. D: Agrypnia straminea male, gland opening in small bald area. E: Oeconesus maori (Oeconesidae) male, gland opening on bald thumb-shaped protuberance. F: Neophylax concinnus (Uenoidae) male, gland opening in small bald area, bald area larger in female. Go, gland opening. Scale bars: A, B, D, F = 10 µm; C, E = 100 µm.