Diplommatina silvicola Godwin-Austen, 1886

Figs 8A, 9M

Diplommatina (Diplommatina) silvicola Godwin-Austen, 1886: 178 .

Diplommatina (Diplommatina) silvicola – Gude 1921: 335. — Ramakrishna et al. 2010: 92. — Budha et al. 2015: 7.

Diagnosis

Measurements (n = 7): SH 2.3–2.5 mm, SW 1.2–1.3 mm, Wh 6.0–6.5. Dextral, penultimate and body whorls nearly equal in width, constriction at the middle of the parietal lip above the aperture (Fig. 9M). One long parietalis (Fig. 8A 3). One vertical palatalis. Horizontal palatalis absent (Fig. 9M). Columellaris prominent. Columellar tooth distinct. Protoconch smooth, Wh 1.5, with minute pits, radial ribs absent (Fig. 8A 1). Teleoconch with strong, widely spaced radial ribs, about 4–6 ribs/ 0.5 mm on the penultimate whorl; 5–7 ribs/ 0.5 mm on the body whorl towards the aperture (Fig. 8A 2, A 4). Spiral striation distinct. Umbilicus closed. Aperture circular. Peristome usually simple, but with two lips in some adult shells; inner lip very thick and elevated. Columellar margin of the peristome straight. Parietal wall of aperture not extending to the body whorl.

Material examined

Possible syntype

INDIA: 1 shell, [ D. silvicola Godwin-Austen 1886 Jatinga Valley, N. Cachar, India. W.F. Webb, ex. coll. Godwin-Austen 06.07.1928] (RBINS 525561, MT 1104).

Other material examined

NEPAL: 11 shells, Panitanki, Balaju, Kathmandu at the base of a sandstone hill, Shivapuri-Nagarjun National Park, 1356 m, 27.736501 N, 85.298484 E, 14 Apr. 2008, P.B. Budha leg. (CDZMTU 050); 2 shells, Raniban, Balaju, Kathmandu, 1780–1820 m, 27.745997 N, 85.287240 E, 4 Jan. 2009, Srijanal Khanal leg. (CDZMTU 050b).

Remarks

Diplommatina silvicola is a very distinct species due to its ovate and transparent shell.