Pupinidius streptaxis ( Moellendorff, 1901 )

Wu, Min & Zheng, Wei, 2009, A review of Chinese Pupinidius Moellendorff (Gastropoda, Stylommatophora: Enidae), with the description of a new species, Zootaxa 2053, pp. 1-31 : 25-26

16. Pupinidius streptaxis ( Moellendorff, 1901)

Figs 1 , 7 F–G

Material examined. Type material, Museum of Institute of Zoology, St. Petersburg. SMF-41986: Lectotype. Kuang-ting (Guanting in new spelling. 33°48΄ N, 104°30΄ E), Kansu, China. Slg. O.v.Moellendorff. SMF- 41987: Paratypes. 2 fmss. Kuang-ting, Kansu, China. Slg. O.v.Moellendorff.

Distribution. Gansu (type locality).

Type locality. Near Kuang-ting, between Li-dshia-pu and Hsi-gu-tsheng.

Diagnosis. Shell bandless; striate. Aperture without angular tubercle. Most swollen part at body whorl. With 5.375–5.875 whorls; height 15.8–17.3, diam. maj. 12.1–13.3.

Re-description of Shell. Global; apex protruded. Most swollen part at body whorl. Dextral; thin; solid; opaque; glossy; not speckled; not spirally grooved; with 5.375–5.583–5.875 whorls. Whorls more or less flattened; not shouldered. Growth lines usually not very clear. Embryonic shell smooth; polished; with 1.500–1.500–1.500 whorls. Postnuclear whorls smooth. Suture normal, without narrow defined zone on beneath whorl. Last whorl gradually ascending towards aperture; rounded at periphery; without smoothed spiral peripheral depression nor rugate region. Shell 15.8–16.7–17.3 high; 12.1–12.7– 13.3 in diam. maj. Height/width ratio 1.27–1.31–1.36. Aperture in a plane; completely attached to body whorl; truncate-ovate; not adnate; oblique; not armed; without angular tubercle; 9.2–10.1–10.7 high; 7.5–8.2–8.8 wide. Ratio of shell height to aperture height 1.62–1.66–1.72. Peristome reflexed with distinct cuff. Cuff made by the reflexed peristome straight and not curved backward, or curved backward. Peristome expanded; sharp. Parietal callus indistinct. Columellar margin reflexed. Columella vertical, or arched. Outer edge of columellar lip vertical. Umbilicus very narrowly open. Apical whorls normally coloured. Shell multicoloured; background corneous brown, below apex with very broad white striations which make the shell whitish; not brightly banded; spirally without colour band.

Figures

FIGURE 1. Distribution map of Pupinidius spp. Red dot, Pupinidius anocamptus, P. nanpingensis nanpingensis and P. nanpingensis ambigua; red circle, P. porrectus; black dot, P. pupinella altispirus; black circle, P. chrysalis; blue dot, P. obrutschewi contractus and P. pupinella pupinella; blue circle: P. latilabrum; green dot, P. melinostoma, P. nanpingensis nanpingensis and P. wenxian sp. nov.; yellow dot, P. obrutschewi obrutschewi and P. streptaxis; yellow circle, P. porrecta pygmaea. P. pupinidius and P. gregorii have not been mapped here due to the unrecognizable locality names. Although the original description of the type locality of P. chrysalis is not accurate and geographically wrong, mapping of the species is possible here based only on the recognized information therein.

FIGURE 7. A – E, Pupinidius pupinidius (Moellendorff, 1901). A, Lectotype, SMF- 41992; B, 1 paratype, SMF- 41993; C – E, type specimens, ZI RAS-N 613. F – G, Pupinidius streptaxis (Moellendorff, 1901). F, type specimen, ZI RAS; G, Lectotype, SMF- 41986. H, Pupinidius wenxian sp. nov., Holotype, HBUMM- 05432 - specimen 1.