Serina Gredler (Gastropoda, Stylommatophora: Enidae), the continuous-peristomed mountain snails endemic to the eastern slope of the Qinghai-Xizang Plateau Author Wu, Min Author Xu, Qin text Zootaxa 2013 3620 1 43 66 journal article 10.11646/zootaxa.3620.1.2 60ae7d68-88b7-4da4-acae-6e4cda073ea0 1175-5326 283400 3870AC9F-A4EE-4E36-86C7-E1D6967A2A2E 7. Serina soluta (Möllendorff, 1901) Figs. 1 , 5 F–G, 7; Tables 1 , 3 Buliminus ( Serina ) solutus Möllendorff, 1901: 361 , pl.16, figs. 15–18. Buliminus ( Serina ) solutus— Kobelt, 1902: 863, pl. 123, figs. 15–18. Ena ( Serina ) soluta— Haas, 1933: 319; Yen, 1938: 442. Serina soluta soluta— Yen, 1939: 87, pl. 8, fig. 21; Chen, Zhou, Luo & Zhang, 2003: 442. Type locality. Wa-sy-kou and Liu-ting near Tung valley (respectively Wasigou and Luding in modern spelling, Sichuan). Material examined. SMF-42047: Lectotype (Yen, 1939: 87); Wa-sy-kou am Tung, China . ZI RAS- N–294: 1893–IV–15. ZI RAS-N–284: type material, 1893–VII–15. NHM-Trechmann Acc. No. 2176: 1 fms, Tibet. Distribution. Sichuan ( type locality). Diagnosis. Shell with the most swollen part occurred at penultimate whorl and body whorl. Whorls with a narrow, defined zone below the suture. Last whorl straight or descending in front; rounded at periphery. Aperture not duplicate; separated from body whorl; not armed. Shell. Fusiform; with apex not abruptly pointed; dextral; with the most swollen part occurred at penultimate whorl to body whorl; height 11.9–13.2–14.3, diameter major 4.6–5.2–5.8, ratio of height /diameter major 2.32–2.57–2.79. Growth lines fine and clear. Whorls 7 1/2–8 1/2-–9, convex; with or without a narrow, defined zone below the suture. Embryonic shell 1 1/2–1 5/8+–1 7/8 whorls. Postnuclear whorls smooth. Last whorl straight or descending in front; rounded at periphery; abaperturally very obscurely with a rugate region with crowded and/or thickened growthline-like folds. Aperture in a plane and straight, or wavy; subcircular; oblique; separated from body whorl; not armed; height 3.7–4.0–4.6, width 2.8–3.1–3.7, ratio of shell height /apertural height 2.91–3.32–3.51. Aperture not duplicate. Peristome and parietal callus almost completely fusing except for a channel at upper insertion of peristome. Reflexed part of peristome straight and not curved backward. Columellar margin reflexed. Columella arched. Umbilicus narrowly open. Shell uniformly light yellowish brown. Aperture dirty white. Measured specimen: SMF-42047, 1 shell.