Diplommatina silvicola Godwin-Austen, 1886

Budha, Prem B., Naggs, Fred & Backeljau, Thierry, 2017, The genus Diplommatina Benson, 1849 (Gastropoda: Caenogastropoda: Diplommatinidae) in Nepal, with the description of seven new species, European Journal of Taxonomy 337, pp. 1-30 : 20-22

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.