Serina soluta

Wu, Min & Xu, Qin, 2013, Serina Gredler (Gastropoda, Stylommatophora: Enidae), the continuous-peristomed mountain snails endemic to the eastern slope of the Qinghai-Xizang Plateau, Zootaxa 3620 (1), pp. 43-66 : 58

8. Serina soluta , synonymous name Serina soluta inflata Yen, 1939

Figs. 1 , 5 H–I, 7; Tables 1 , 3

Serina soluta inflata Yen, 1939: 87 , pl. 8, fig. 23.

Serina soluta inflata— Chen, Zhou, Luo & Zhang, 2003: 442.

Type locality. Between Kangding and Wasigou (Sichuan).

Material examined. HBUMM-04318: 3 fms (all measured); Luding, Sichuan, 2004–IX–7, colln. KS. SMF- 42095: Holotype. SMF-42096: Paratypes, 10 fms (with one's apex lost).

Distribution. Sichuan (type locality, Luding).

Diagnosis. Shell with the most swollen part occurred at penultimate whorl and body whorl. Suture simple. Last whorl gradually ascending towards aperture; rounded at periphery. Aperture separated from body whorl; not armed; not duplicate.

Shell. Fusiform; with apex not abruptly pointed; dextral; with the most swollen part occurred at penultimate whorl to body whorl. Growth lines fine and clear. Whorls convex. Postnuclear whorls smooth. Suture simple. Last whorl more or less gradually ascending towards aperture; rounded at periphery; abaperturally indistinctly with a rugate region with crowded and/or thickened growthline-like folds. Aperture wavy; subcircular; vertical; separated from body whorl; not armed. 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 brown. Aperture brownish white. Measured specimens: SMF-42095, SMF-42096, HBUMM-04318: 13 shells.

Taxonomic remarks. The state of the sinuation of aperture in this subspecies is quite similar to that in S. soluta stenochila . In addition, the clearly arranged growth lines in this species are distinctly sparser and thicker than the latter taxa. Other opinion of this taxon sees in the Taxonomic remarks under Serina soluta stenochila .

Figures

FIGURE 1. Distribution of Serina species. S. soluta inflata Yen, 1939 is also indicated although synonymized in this paper. S. soluta stenochila (Möllendorff, 1901) is not mapped due to imprecise locality information.

FIGURE 5. A, B. Serina ser Gredler, 1898. A. SMF- 42036, Wangjiaba. B. ZI RAS N 76. C-E. Serina subser Gredler, 1898. C. NHM- 1902.5.13.23 – 24, Gansu. D. SMF- 42045, Wudu. E. HBUMM- 05392 – specimen 22, Lixian. F-K. Serina soluta (Möllendorff, 1901). F. NHM-Trechmann Acc. No. 2176, Dangchang. G. SMF- 42047, Wasigou. H, I. Serina soluta inflata Yen, 1939. H. HBUMM- 04318 – specimen 2, Luding. I. SMF- 42095, holotype, Kangding. J, K. Buliminus soluta stenochila Möllendorff, 1901. J. SMF- 42048, lectotype, valley of Daduhe River. K. SMF- 42049, paralectotype. L. Serina vincentii (Gredler, 1898), SMF- 42032, between Tshun-dshia-wan and Wangjiaba. M, N. Serina denticulata n. sp. M. HBUMM- 00281 – specimen 5, holotype, Daigusi. N. HBUMM- 00281 – specimen 6, paratype, Daigusi.