Diplommatina miriensis Godwin-Austen, 1917

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 : 13

publication ID	https://doi.org/ 10.5852/ejt.2017.337
publication LSID	lsid:zoobank.org:pub:2669CB69-5064-4B5D-AC25-856680E3B9AA
DOI	https://doi.org/10.5281/zenodo.3850706
persistent identifier	https://treatment.plazi.org/id/03C6CF41-FFE8-FFE7-FDAF-4669D485FA69
treatment provided by	Carolina
scientific name	Diplommatina miriensis Godwin-Austen, 1917
status

Treatment

Diplommatina miriensis Godwin-Austen, 1917 View in CoL

Figs 5A View Fig , 9G View Fig

Diplommatina miriensis Godwin-Austen, 1917: 577 View in CoL , fig. 4D.

Diplommatina (Metadiancta) miriensis View in CoL – Gude 1921, 342. — Ramakrishna et al. 2010: 95 — Budha et al. 2015: 7.

Diagnosis

Measurements (n = 5): SH 1.5–1.6 mm, SW 0.8–1.0 mm, Wh 5.5. Dextral, whorls regularly increasing, penultimate and body whorl nearly equal in width. Constriction at the middle of the parietal wall ( Fig. 9G View Fig ). Parietalis very weak, nearly invisible ( Fig. 5A View Fig 3 View Fig ). One vertical palatalis along the constriction and one very strong horizontal palatalis just above the columella ( Fig. 9G View Fig ). Columellaris thin and weak. Columellar tooth very weak to nearly absent. Protoconch smooth, Wh approx. 1.5, with very distinct small pits evenly distributed all over, no radial ribs ( Fig. 5A View Fig 1 View Fig ). Teleoconch with dense radial ribs; about 10–13 ribs/ 0.5 mm on the penultimate whorl; 8–9 ribs/ 0.5 mm on the body whorl towards the aperture ( Figs 5A View Fig 2 View Fig , 5A View Fig 4 View Fig ). Very fine spiral striation present. Umbilicus closed. Aperture circular. Peristome with two lips; under high magnification 6–10 ribs visible between the lips ( Fig. 5A View Fig 4 View Fig ). Parietal wall with thin callus. Angular edge of the peristome curved ( Fig. 5A View Fig 3 View Fig , A 4 View Fig ); basal edge of peristome rounded; outer lip thin, inner lip thick. Parietal wall of the aperture hardly reaching half of the body whorl.

Material examined

NEPAL: 1 shell, Deurali, Syabru, Langtang National Park, 2412 m, 27.805037 N, 85.387862 E, 25 Apr. 2008, P.B. Budha leg. ( CDZMTU 036); 3 shells, Okhareni, Shivapuri-Nagarjun National Park, 2326 m, 27.813051 N, 85.4217 E, 22 Jun. 2007, R. Devkota and N. Kohar leg. ( CDZMTU 037); 1 shell, Baghdwar, Shivapuri-Nagarjun National Park, 2500 m, 27.8133 N, 85.3877 E, 25 Apr. 2008, P.B. Budha leg. ( CDZMTU 037b); 4 shells, Cholangpati, Langtang National Park, 3443 m, 28.110154 N, 85.334238 E, 19 May 2008, P.B. Budha leg. ( CDZMTU 038); 7 shells, Raniban, Balaju, Kathmandu, 1840–1902 m, 27.745997 N, 85.287240 E, 12 Mar. 2009, S. Khanal leg. ( CDZMTU 058).

Remarks

D. miriensis is the smallest species reported in the present study. Similar sized species are D. godwini Möllendorff, 1898 from Naga Hill, NE India, and the south Indian D. minima Beddome, 1875 . Diplommatina godwini has more whorls (>7) than D. miriensis , while the peristome of D. minim a has no curved angular edge.