Diplommatina abiesiana Budha & Naggs,

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: 6

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Diplommatina abiesiana Budha & Naggs

sp. nov.

Diplommatina abiesiana Budha & Naggs  sp. nov.


Figs 3AView Fig, 9AView Fig


Measurements (n = 4): SH 2.7–2.9 mm, SW 1.4–1.5 mm, Wh 6.0–6.5; holotype: SH 2.8 mm, SW 1.5 mm, Wh 6.0. Dextral, penultimate whorl and body whorl nearly equal in width. Constriction at the middle of the parietal wall ( Fig. 9AView Fig). Parietalis moderate, gradually elevated inner side of the body whorl. A short horizontal palatalis near the inner edge of the peristome. Columellaris moderately developed ( Fig. 3A3View Fig). Columellar tooth weak. Protoconch smooth, Wh 1.5–2.0, with very minute evenly distributed pits, without radial ribs ( Fig. 3AView Fig 1View Fig). Teleoconch with dense radial ribs; 9–12 ribs/ 0.5 mm on the penultimate whorl; 7–9 ribs/ 0.5 mm on the body whorl towards the aperture ( Fig. 3AView Fig 2View Fig, A 4View Fig). Spiral striation present. Umbilicus open. Aperture circular. Peristome with two lips; inner lip thin; 8–10 thin ribs between the two lips ( Fig. 3AView Fig 4View Fig). Parietal wall of the aperture extending to less than half the body whorl. Operculum paucispiral, corneous, thin, transparent, slightly concave, outer surface smooth, inner surface with weak ridge at the columellar margin.


The species name refers to the habitat of the type locality, i.e., an Abies  forest.

Type material


NEPAL: Cholangpati , Langtang National Park, 3443 m, Abies  forest, 28.110154 N, 85.334238 E, 19 May, R. Devkota and K. Saud leg. ( CDZMTU020).



NEPAL: 3 shells from the type locality, same data as holotype ( CDZMTU 021); 8 shells, Baghdwar, 2314 m, Shivapuri-Nagarjun National Park, 27.8052 N, 85.38447 E, 24 Jun. 2007, P.B. Budha and R. Devkota leg. ( CDZMTU 055); 1 shell, Dhunche, 2056 m, Langtang National Park, 28.10894 N, 85.29155 E, 3 Jun. 2007, P.B. Budha leg. ( CDZMTU 056).


The shell form of D. abiesiana  is similar to that of D. nana W.T. Blanford, 1865  ( Blanford 1865; Hanley & Theobald 1876: pl. 140, fig.1; Godwin-Austen 1886: pl. 49, fig. 6.), but differs by its less prominent columellar tooth, the more widely-separated radial ribs, the penultimate and body whorls of equal width, and the circular aperture.