Pupinidius obrutschewi contractus ( 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 : 16-17

10. Pupinidius obrutschewi contractus ( Moellendorff, 1901)

Figs 1 , 5 C–D, 8F, 14

Buliminus (Pupinidius) obrutschewi contractus Moellendorff, 1901: 343 , pl. 13, figs 25, 26, 27; Kobelt, 1902: 847. Pupinidius obrutschewi contractus Yen, 1939: 83 , pl. 7, fig. 47.

Material examined. HBUMM-04282 (19 fmss. All measured; specimen-2 for dissection): 1250 m a.s.l., Nanyu, Zhouqu County (33°48΄ N, 104°18΄ E), Gansu, 2004-IV-30, coll. M.Wu. HBUMM-00333 (8 fmss without striations): 1250 m a.s.l., Nanyu, Zhouqu County (33°48΄ N, 104°18΄ E), Gansu, 2004-IV-30, coll. M.Wu. SMF-41981: Lectotype. Zw. Li-dshia-pu u. Hsi-ku-tsheng (today’s Zhouqu County), Kansu, China. Slg. O.v.Moellendorff. SMF-41985: Paratype. 1 fms. Zw. Li-dshia-pu u. Hsi-ku-tsheng, Kansu, China. Slg. O.v.Moellendorff (measurement of types: ewh 1.500–1.563–1.625, wh 6.375–6.500–6.625, h 18.1–18.7–19.3, diam. maj. 11.3–11.5–11.6, aph 9.3–9.7–10.1, apw 7.2–7.3–7.4, h/diam. maj. 1.56–1.63–1.70, h/aph 1.91–1.93–1.95).

Distribution. Gansu (type locality).

Type locality. Zw. Li-dshia-pu u. Hsi-ku-tsheng (Gansu).

Diagnosis. Shell bandless; striate. Aperture faintly with or without angular tubercle. Most swollen part at body whorl. With 6.000–6.875 whorls; height 17.1–20.6, diam. maj. 11.1–12.9. Penis without penial caecum; internally without fine pilaster. Papilla developed by fused proximal pilasters forming V-shaped structure absent. Epiphallus straight. Epiphallic caecum present. Free oviduct much shorter than vagina, almost invisible.

Re-description of shell. Pointed-ovate; apex protruded. Most swollen part at body whorl. Shell. Shell dextral; thin; solid; almost opaque; glossy; speckled or not; not spirally grooved; with 6.000–6.329–6.875 whorls. Whorls not shouldered; weakly convex. Growth lines usually not very clear. Embryonic shell smooth; polished; with 1.375–1.559–1.750 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 17.1–18.5–20.6 high; 11.1–11.9– 12.9 in diam. maj. Height/width ratio 1.44–1.55–1.71. Aperture in a plane; completely attached to body whorl; truncateovate; not adnate; oblique; not armed; weakly with angular tubercle, or without angular tubercle; 9.0–9.7–10.8 high; 6.8–7.3–7.8 wide. Ratio of shell height to aperture height 1.78–1.90–2.03. Peristome reflexed, without distinct cuff; expanded; sharp. Parietal callus indistinct. Columellar margin slightly reflexed. Columella vertical. Outer edge of columellar lip vertical. Umbilicus very narrowly open. Apical whorls normally coloured. Shell multicoloured; light-chestnut with more or less evenly distributed whitish radial striation except apex. Aperture white; not brightly banded; spirally without colour band.

Genitalia. Vas deferens short; swollen proximally; entering epiphallus apically with distinct demarcation. Epiphallus short; cylindrical; of uniform thickness; normally straight; externally smooth. Epiphallic caecum located near vas deferens entrance; blunt apically. Flagellum short; subglobular; proximally normal; with tip blunt. Penis with terminal entrance of epiphallus; clavate; without penial caecum; distally enlarged; thinwalled; internally without fine longitudinal pilaster, with 1 V-shaped pilaster. V-shaped structure distally without a papilla. Other penial inner structure absent. Penis without process. Penial verge absent. Penial appendix short; branched off from proximal portion of penis; divided into sections including A-1+A-2, A-3 and A-4+A-5. A-1 and A-2 fused. A-2 and A-3 not fused. Boundary between A-4 and A-5 indistinct. A-5 very short; straight. Penial retractor biramous; attaching to penis in middle part and to A-1+ A-2; with penial retractor arms arising from diaphragm separately. Additional retractor rather than penial or appendicular absent. Muscular band connecting vagina and epiphallus absent. Atrium short; without atrial retractor. Free oviduct much shorter than vagina, almost invisible. Vagina moderately long; not swollen; straight; not lined with loose, spongy tissue; unpigmented. Bursa copulatrix duct short; proximally straight. Bursa copulatrix with stalk; without apical ligament; small; with long neck; poorly defined. Diverticle normally present; shorter than reservoir; expanded. Bursa copulatrix and diverticle distinguishable; forked immediately near their base. Spermatophore unknown.

Measurement of genitalia. P: 5.2; Ep: 3.3; Fl: 0.6; VD: 5.3; Va: 4.7; FO: 0; BCD: 3.8; BC: 1.2; D: 9.1; A- 1+A-2: 3.4; A3: 1; A-4+A-5: 6.8 (in HBUMM-04282-specimen 2).

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 5. A – B, Pupinidius obrutschewi obrutschewi (Moellendorff, 1901), 2 paratypes of SMF- 41983. C – D, Pupinidius obrutschewi contractus (Moellendorff, 1901). C, HBUMM- 04282 - specimen 11; D, Lectotype, SMF- 41981. E – F, Pupinidius porrectus (Moellendorff, 1901). E, Lectotype, SMF- 41998; F, NHM- 1902.5.13.20 Reg.