Pupopsis hendan, Wu, Min & Gao, Linhui, 2010

Wu, Min & Gao, Linhui, 2010, A review of the genus Pupopsis Gredler, 1898 (Gastropoda: Stylommatophora: Enidae), with the descriptions of eight new species from China, Zootaxa 2725, pp. 1-27 : 14-17

7. Pupopsis hendan sp. nov.

Figs. 1 , 3 E, 5C, 8C–8D, 9; Tables 2 , 3

Type material. Holotype: HBUMM-05592–specimen 2 (fma); site No. 0 52, 789 m a.s.l., 32°51ʹ41.6ʹ N, 104°50ʹ43.1ʹ E, Hendan Village, Wenxian County, S. Gansu, China, 2006–IX–29, leg. M. Wu, J. Liu, W. Zheng & L. Gao. Paratypes: HBUMM-05592–specimens 1 (only soft parts), 3–22 (fma), collection data as Holotype; HBUMM-05651–specimens 1 (shell crushed for dissection), 2–20 (8 fma, 10 fms, 1 juvenile with soft parts), 829 m a.s.l., 32°51ʹ44.7ʹ N, 104°50ʹ48.2ʹ E, Hendan Village, along national highway no. 212, S. Gansu, China, 2006– IX–29, leg. M. Wu, J. Liu, W. Zheng & L. Gao; HBUMM-06106–specimens 1–2 (1 fma, 1 fms), 829 m a.s.l., 32°51ʹ44.7ʹ N, 104°50ʹ48.2ʹ E, Hendan Village, hill on opposite bank of Baishuijiang River and national highway no. 212, S. Gansu, China, 2006–IX–29, leg. M. Wu, J. Liu, W. Zheng & L. Gao.

Type locality. Hendan Village, Wenxian County, S. Gansu.

Material examined. Type material.

Distribution. S. Gansu ( Hendan ).

Etymology. The new species is named after the type locality “ Hendan ” which is a mountain village near the bank of the Baishuijiang River. The epithet is a noun in apposition.

Diagnosis. Shell with 6.250–8.000 whorls. Height 7.1–8.5, diam. maj. 2.8–3.2. Parietal tooth present. Columellar tooth prominent and expanded inward. Palatal tooth present, ridge-like. Epiphallus forming a few loops. Flagellum present. Penial caecum present. Penis distally with one V-shaped pilaster. A-2 near A-3 internally without a ring of papillae. A-3 opening into A-2 through a long needle-like papilla. Bursa copulatrix duct proximally twisted. Diverticle present.

Shell. Pointed-ovate; apex not acuminate; dextral; thin-shelled; solid; opaque; dull; with 6.250–7.441–8.000 whorls. Whorls never spirally grooved; convex. Embryonic shell smooth; not polished; with 1.500–1.638–2.125 whorls. Postnuclear whorls wrinkled. Whorls with a narrow, defined zone below the suture, especially after the first three whorls. Last whorl straight in front, or gradually ascending toward aperture; rounded at periphery. Shell 7.1– 7.8–8.5 high; 2.8–3.0– 3.2 in diam. maj. Height/diam. maj. ratio 2.29–2.62–2.94. Aperture subovate; almost vertical; its insertions separated; 2.3–2.6–2.8 high, 2.0–2.1–2.4 wide. Ratio of shell height to aperture height 2.80– 3.06–3.43. Palatal margin rounded. Peristome expanded; sharp. Parietal callus distinct; with angular tubercle. Parietal tooth present. Palatal wall with a ridge-like tooth which is extended 1/4 to 1/3 whorl inward. Columellar margin reflexed; with one prominent tooth expanding inward. Umbilicus narrowly open. Shell uniformly greenishbrown; aperture of the same colouration.

Genitalia. Vas deferens short; of even thickness; entering epiphallus apically. Epiphallus long; narrowed towards distal end; forming a few loops. Epiphallic caecum apically blunt; almost in middle of epiphallus. Flagellum present; short; tubular; proximally not expanded; with blunt tip. Penis clavate and proximally slightly enlarged; thin-walled; with terminal entrance of epiphallus; internally with pilasters and one V-shaped pilaster. Proximal free ends of V-shaped pilaster approaching at penial retractor insertion. Papilla developed by fused distal pilasters forming V-shaped structure absent. Penial caecum conic; situated at penis close to epiphallus. Penial verge absent. Penial appendix short; branched off from penis at some distance from atrium; divided into sections including A-1+A-2, A-3 and A-4+A-5. A-1 long; without verge toward penial chamber. A-1 and A-2 fused; internally with longitudinal pilasters. A-2 near A-3 internally without a ring of papillae. A-2 and A-3 not fused. A- 3 opening into A-2 through needle-like, long papilla. Boundary between A-4 and A-5 indistinct. A-5 short; straight. Atrium without retractor. Free oviduct moderately long; longer than vagina. Bursa copulatrix duct long; proximally twisted. Bursa copulatrix small; well defined. Diverticle longer than reservoir; seldom unexpanded.

Measurement of genitalia. P: 1.5; Ep: 10.2; Fl: 0.9; VD: 4.8; Va: 0.9; FO: 1.2; BCD: 10.4; BC: 0.5; D: 3.8; A- 1+A-2: 1.2; A-3: 0.4; A-4+A-5: 5.4 (HBUMM-05592–specimen 1, paratype).

Remarks. The new species has a fully armed aperture with a parietal tooth, a columellar tooth and a palatal, ridge-like tooth. The columellar tooth is nearly invisible in apertural view, but it is distinctly expanded inwards along the columella. The genitalia of P. hendan are closest to P. subpupopsis sp. nov. but differ in the interior structure of the distal part of the penis.

Figures

FIGURE 1. Distribution map of the genus Pupopsis. Red dot, Pupopsis dissociabilis (Sturany, 1900); blue dot, P. retrodens (Martens, 1879); blue square, P. maoxian sp. nov.; red square, P. rhodostoma sp. nov.; green dot, P. subpupopsis sp. nov.; green square, P. yengiawat sp. nov. Two grey dots each with two or five species as indicated in the boxes on the map. The species P. paraplesius (Sturany, 1900), P. polystreptus (Sturany, 1900) and P. zilchi sp. nov. are not mapped due to no precise locality information available.

FIGURE 3. Apertural view of Pupopsis species. A, Pupopsis pupopsis (Gredler, 1898), SMF- 42076; B, Pupopsis retrodens (Martens, 1879), HBUMM- 06460 – specimen 1; C-D, Pupopsis torquilla (Möllendorff, 1901). C, lectotype, SMF- 42082; D, HBUMM- 05584 – specimen 1; E, Pupopsis hendan sp. nov., holotype, HBUMM- 05592 – specimen 2; F, Pupopsis maoxian sp. nov., holotype, HBUMM- 01023 – specimen 1; G, Pupopsis rhodostoma sp. nov., holotype, HBUMM- 05872 – specimen 2; H, Pupopsis subpupopsis sp. nov., holotype, HBUMM- 05676 – specimen 1; I, Pupopsis subtorquilla sp. nov. A, holotype, HBUMM- 05429 – specimen 2; J, Pupopsis yengiawat sp. nov., holotype, HBUMM- 04439 – specimen 1; K, Pupopsis yuxu sp. nov., Holotype, HBUMM- 06089 – specimen 3; L, Pupopsis zilchi sp. nov., holotype, SMF- 334777.