FIGURE 6 in A new species of Gerstfeldtiancylus Starobogatov, 1989 (Pulmonata: Basommatophora: Acroloxidae) from Lake Baikal

FIGURE 6. Longitudinally sectioned male copulatory organ of Gerstfeldtiancylus species (A–D, G. diagrammic). A. G. benedictiae Starobogatov, 1989. B, E. G. roepstorfi Shirokaya et al., 2003. C. G. kotyensis Starobogatov, 1989. D. G. renardii (Dybowski, 1884). A–E. From Kruglov & Starobogatov (1991a), Shirokaya (2005). F–G. G. ushunensis, sp. nov. (ZIN RAS 2/521–2006). fl, flagellum; mp, male genital pore; p, penis; ps, penis sheath; psr, penis sheath retractor; pr, preputium; prc, preputium chamber; prp, preputium pilasters; sar, sarcobellum; vd, vas deferens; ve, velum. Scale bars: A = 0.5 mm; B–G = 1 mm