Ponsadenia (Mesasiata) duplocincta ( Martens, 1879 )

Wu, Min & Guo, Jian-Ying, 2006, Revision of the Chinese species of Ponsadenia (Gastropoda: Helicoidea, Bradybaenidae), Zootaxa 1316, pp. 57-68 : 59

Ponsadenia (Mesasiata) duplocincta ( Martens, 1879)

Figs. 1A , 2 A–C

Helix duplocincta Martens, 1879: 125 ; Pilsbry (1894, 216, pl. 49, figs. 39–42). Eulota duplocincta Pilsbry, 1894 , 204; Cockerell (1928, 362, fig. B).

Bradybaena duplocincta Yen, 1939 , 135, pl. 14, fig. 7.

Ponsadenia (Mesasiata) duplocincta Schileyko, 1978 , 120, figs. 46–48, pl. I, fig. 6.

Type locality. China, Kuldsha (Kuldja in modern spelling; N 44° 0', E 81° 36').

Material examined. HBUMM 01116E, HBUMM 01115A, 12 fully mature snails in ethanol, 4 dissected. Collection data: China: Xinjiang: Kuldja, Guozigou, 1734 meters above sea level, (N 44° 28' 17.0'', E 081° 08' 17.6''), limestone, scrubland. 7th June, 2002. Coll. M. Wu & A. Ayken; HBUMM 01098b, 1 full mature snail in ethanol, dissected. Collection data: China: Xinjiang: Kuldja Forest, 1736 meters above sea level, (N 44° 09' 23.1'', E 081° 44' 18.0''), limestone, mixed forest. 26th May, 2002. Coll. M. Wu & A. Ayken.

Redescription of genitalia. Membranous sac surrounding terminal genitalia absent ( Fig. 2 B). Penial sheath present ( Fig. 2 C), covering proximal 1/5 of penis. Penis of moderate length, about twice as long as dart sac; slender; simple outside. Penial pilasters similar, undifferentiated. Penis­epiphallus chamber absent. Epiphallic papilla absent. Flagellum lacking. Mucous glands numerous; approximately equal in length to dart sac; tube­shaped or complicated branching pattern ( Fig. 2 A). Vaginal region between dart sac and atrium short, about as long as dart sac ( Fig. 2 C). Proximal part of dart sac without neck­ structure. Dart sac containing one dart. Dart ca. 4.0 mm in length; slightly curved. Accessory sac with small chamber, opened toward chamber containing dart ( Fig. 2 C). All mucous glands inserted into well­developed bridge­like structure, which is very developed, about two to four times larger than the accessory sac in volume, and without papilla of mucous glands entrance ( Fig. 2 C). Polylayered structure in dart sac complex absent ( Fig. 2 B).

Figures

FIGURE 2. Ponsadenia (Mesasiata) duplocincta (Martens, 1879), HBUMM 01098 b­specimen 1. A, basal view of dart apparatus; B, sagittal section of dart apparatus, showing mucous glands insertion; C, sagittal section of terminal genitalia, showing relative position of penis, vagina and dart apparatus.

FIGURE 1. A. Ponsadenia (Mesasiata) duplocincta (Martens, 1879), HBUMM 01116 E­ specimen 1; B. Ponsadenia (Ponsadenia) semenovi (Martens, 1864), HBUMM 01097 E­ specimen 3.