Pupinidius obrutschewi obrutschewi ( 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 : 14-16

9. Pupinidius obrutschewi obrutschewi ( Moellendorff, 1901)

Figs 1 , 4 E–G, 5A–B, 8E, 13

Buliminus obrutschewi Sturany, 1900: 29 , pl. 3, figs 26–28.

Buliminus (Pupinidius) obrutschewi Moellendorff, 1901: 342 .

Buliminus (Pupinidius) obrutschewi eurystoma Moellendorff, 1901: 342 , pl. 8, figs 23, 24; Wiegmann, 1901: 246, pl. 10, figs 40–44; Kobelt, 1902: 846, pl. 108, figs 1, 2, pl. 120, figs 23–27.

Pupinidius obrutschewi obrutschewi Yen, 1939: 83 , pl. 7, fig. 46.

Material examined. HBUMM-05672 (20 out of 36 mature shells were measured; specimen-1 for dissection): 1233 m a.s.l., 33°41΄47.3΄ N, 104°29΄10.3΄ E, eastern bank of Lianghekou, Gansu, 2006-X-2, limestone, coll. J.Liu & W.Zheng; HBUMM-05678 (30 fmss): 1286 m a.s.l., 33°41΄38.5΄ N, 104°28΄48.6΄ E, western bank of Lianghekou, Gansu, 2006-X-2, other stone replacing limestone, coll. J.Liu & W.Zheng (measurement: ewh 1.500–1.669–1.875, wh 6.500–7.044–7.500, h 18.7–21.0–23.3, diam. maj. 10.1–11.1–11.8, aph 9.0–9.7–10.9, apw 6.4–7.5–8.0, h/diam. maj. 1.62–1.89–2.12, h/aph 1.99–2.16–2.33); ZI RAS-N512: type material, 1885- VI-22, coll. Potanin. SMF-41982: Lectotype v. B. eurystoma Mlldff. Liang-dshia-pa, Kansu, China. Slg. O.v.Moellendorff. SMF-41983: Paratypes v. B. eurystoma Mlldff. 2 fmss. Liang-dshia-pa, Kansu, China. Slg. O.v.Moellendorff (measurement of types: ewh 1.500–1.563–1.625, wh 6.875–7.129–7.375, h 21.1–22.2–23.8, diam. maj. 12.9–13.4–13.9, aph 9.9–10.7–11.2, apw 8.5–8.8–9.0, h/diam. maj. 1.58–1.66–1.72, h/aph 1.97–2.06–2.13). SMF-41984: One juvenile. Wen-hsien, Kansu, China. Slg. O.v.Moellendorff.

Distribution. Gansu (type locality, Liang-dshia-pa, Lianghekou, Wenxian ).

Type locality. Schy-pa (S Gansu).

Diagnosis. Shell bandless; striate. Aperture faintly with or without angular tubercle. Most swollen part at body whorl. With 5.750–7.375 whorls; height 15.9–23.8, diam. maj. 10.4–13.9. Penis without penial caecum; internally without fine longitudinal pilaster. Papilla developed by fused proximal pilasters forming V-shaped structure present. Epiphallus straight. Epiphallic caecum present.

Re-description of shell. Pointed-ovate; apex protruded. Most swollen part at body whorl. Shell dextral; thin; solid; opaque; glossy; speckled or not; not spirally grooved;with 5.750–6.250–6.625 whorls. Whorls flattened; not shouldered. Growth lines usually not very clear. Embryonic shell smooth; polished; with 1.500–1.551–1.750 whorls. Postnuclear whorls smooth. Suture normal, without narrow defined zone on beneath whorl. Last whorl slightly gradually ascending towards aperture; slightly angular at periphery (in lectotype indistinct); without smoothed spiral peripheral depression nor rugate region. Shell 15.9–19.5–21.5 high; 10.4–11.3–12.0 in diam. maj. Height/width ratio 1.44–1.73–2.06. Aperture in a plane; completely attached to body whorl; truncate-ovate; not adnate; oblique; not armed; faintly with angular tubercle, or without angular tubercle; 8.2–9.6–10.2 high; 6.7–7.4–8.0 wide. Ratio of shell height to aperture height 1.77–2.03–2.28. Peristome narrowly reflexed with distinct cuff; expanded; sharp. Parietal callus indistinct. Columellar margin reflexed. Columella vertical. Outer edge of columellar lip vertical. Umbilicus very narrowly open. Apical whorls normally coloured. Shell multicoloured; in darker or lighter brown. With narrow or thick white stripes below protoconch. Aperture white; not brightly banded; spirally without colour band.

Re-description of genitalia. Vas deferens slightly swollen proximally; entering epiphallus apically with distinct demarcation. Epiphallus more or less short; slightly narrowed towards proximal end; normally straight; externally smooth. Epiphallic caecum present; blunt apically; located near vas deferens entrance. Flagellum short; tubular; proximally normal; with tip pointed. Penis with terminal entrance of epiphallus; clavate; without penial caecum; distally enlarged; thin-walled; internally without fine pilasters, with with 2–3 circular ridges and 1 V-shaped pilaster. V-shaped pilaster with free proximal end approaching at penial retractor insertion, distally developing a small nipple-like papilla. Penis without process. Penial verge absent. Penial appendix moderately long; 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, interiorly smooth. A-2 and A-3 not fused. Boundary between A-4 and A-5 indistinct. A-5 long; almost straight. Penial retractor biramous; attaching to penis in middle part and to A-1+ A-2; with penial retractor arms arising from diaphragm closed to each other.

Additional retractor other than penial or appendicular absent. Muscular band connecting vagina and epiphallus absent. Atrium short; with weak retractor. Free oviduct longer than vagina. Vagina short; not swollen; straight; not lined with loose, spongy tissue; unpigmented. Bursa copulatrix duct moderately long; proximally straight. Bursa copulatrix with stalk; without apical ligament; normal in size; with short neck; well defined. Diverticle normally present; longer than reservoir; unexpanded. Bursa copulatrix and diverticle distinguishable; forked more distally from their base.

Measurement of genitalia. P: 3; Ep: 7.8; Fl: 1.4; VD: 15.0; Va: 2.3; FO: 4.3; BCD: 5.9; BC: 1.1; D: 4.5; A- 1+A-2: 3.8; A3: 1.8; A-4+A-5: 12 (in HBUMM-05672-specimen 1).

Remarks. The new collected specimens are more or less smaller than the type specimens in shell size. The population (HBUMM-05678), habited in the opposite bank of Bailongjiang River, differs slightly from the individuals represented by HBUMM-05672 by larger shell size, darker colouration, and more dense striation on shell.

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 4. A – D, Pupinidius nanpingensis nanpingensis (Moellendorff, 1901). A – B, respectively HBUMM- 05497 - specimen 7 & 8; C, Holotype, SMF- 41994; D, type specimen, ZI RAS-N 193. E – G, Pupinidius obrutschewi obrutschewi (Moellendorff, 1901). E, type specimen, ZI RAS-N 512; F, HBUMM- 05672 - specimen 12; G, Lectotype, SMF- 41982.