Diplommatina shivapuriensis Budha & Backeljau sp. nov.

urn:lsid:zoobank.org:act: 76F83F52-F806-48D2-A61F-57C5BA4A2E29

Figs 7C, 9L

Diagnosis

Measurements (n = 8): SH 2.5–3.0 mm, SW 1.2–1.3 mm, Wh 6.5–7.0; holotype: SH 2.9 mm, SW 1.4 mm, Wh 6.5. Dextral, penultimate and body whorl nearly equal, constriction at the middle of the parietal lip (Fig. 9L). Two parietalis: Prt1 long and well developed; Prt2 short and hardly visible (Fig. 7C 3). One vertical palatalis along the constriction. One horizontal palatalis before the constriction, just above the umbilicus (Fig. 9L). Columellaris prominent. Protoconch smooth, Wh approx. 2.0, with minute pits evenly distributed, no radial ribs (Fig. 7C 1). Teleoconch with radial ribs; about 8–10 ribs/ 0.5 mm on the penultimate whorl; 10–13 ribs/ 0.5 mm on the body whorl towards the aperture (Fig. 7C 2, C 4). Spiral striation present. Umbilicus closed. Aperture circular. Peristome slightly curved at AeP, two lips, closer at angular edge. Parietal lip of the peristome slightly raised. Both lips slightly reflected. Operculum paucispiral, corneous, thin, transparent, slightly concave, outer surface smooth, inner surface with weakly raised peripheral circular edge.

Etymology

The species name refers to the Shivapuri peak from where it was collected.

Type material

Holotype

NEPAL: Shivapuri-Nagarjun National Park, 200 m below Shivapuri peak above Baghdwar, 2500 m, 27.813284 N, 85.387712 E. 25 Apr. 2008, P.B. Budha leg. (CDZMTU048).

Paratypes

NEPAL: 50 shells from the type locality, same data as holotype (CDZMTU 049); 6 shells from Deurali, Phobrang, Langtang National Park, 3247 m, 28.1057 N, 85.3263 E, 6 Jun. 2007, P.B. Budha leg. (CDZMTU 049b).

Remarks

Diplommatina shivapuriensis sp. nov. is similar to D. sherfaiensis Godwin-Austen, 1870 from Sherborsip, Jaintia Hill, India (RBINS Dautzenberg collection I.G. 10591, 6 shells). Yet, D. shivapuriensis sp. nov. has a thinner shell, with a constriction in the middle (in D. sherfaiensis the constriction is more towards the columellar edge). The horizontal palatalis is widely separated from the parietal wall in D. sherfaiensis (see image ID 1903.7.1.2254 at www.nhm.ac.uk), but closer to the parietal wall in D. shivapuriensis sp. nov.