Figure 4 in Evolution of the male genitalia in the genus Limnebius Leach, 1815 (Coleoptera, Hydraenidae)

Figure 4. Histological serial sections of the aedeagus of L. furcatus. a1, additional principal ventral appendage; a2, additional secondary ventral appendage; a3, additional dorsal appendage; a-a1 to a-a3, bifurcating appendage of a1 to a3; a-ml, appendage of the median lobe; aa, apical appendage of the median lobe; b, base; bc, basal capsule; bf, basal foramen; cm, connecting membrane; con, connection; fge, flagellum entrance; fgo, flagellum opening; fu, fused; lp, left paramere; ml, median lobe; op, open; rp, right paramere; s, setae. Green, flagellum and related structures; brown, median lobe; orange, parameres; red, additional appendages.