Diplommatina fistulata Budha & Naggs, 2017

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 : 8-9

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.3850666
persistent identifier	https://treatment.plazi.org/id/CC722581-EC59-42AC-AD0F-EFD6247BD1A0
taxon LSID	lsid:zoobank.org:act:CC722581-EC59-42AC-AD0F-EFD6247BD1A0
treatment provided by	Carolina
scientific name	Diplommatina fistulata Budha & Naggs
status	sp. nov.

Treatment

Diplommatina fistulata Budha & Naggs View in CoL sp. nov.

urn:lsid:zoobank.org:act:CC722581-EC59-42AC-AD0F-EFD6247BD1A0

Figs 3C View Fig , 9C View Fig

Diagnosis

Measurements (n = 10): SH 3.0– 3.3 mm, SW 1.5–1.8 mm, Wh 6.5–7.5; holotype: SH 3.3 mm, SW 2.0 mm, Wh 7.5. Dextral, body whorl narrower than penultimate whorl. Constriction at the middle of the parietal lip ( Fig. 9C View Fig ). Parietalis long and very strong ( Fig. 3C3 View Fig ). Two vertical palatalis: a stronger Vpt1 along the constriction and a short Vpt2 running parallel to Vpt1 above the parietal wall ( Fig. 9C View Fig ). No horizontal palatalis. Columellaris prominent. Columellar tooth strong. Protoconch smooth, Wh 2.0, with minute pits scattered over the surface ( Fig. 3C View Fig 1 View Fig ). Teleoconch with dense radial ribs; 9–11 ribs/ 0.5 mm on the penultimate whorl; 15–20 ribs/ 0.5 mm on the body whorl towards the aperture ( Fig. 3C View Fig 2 View Fig , C 4 View Fig ). Distinct dorsal fold at base of body whorl, running towards the aperture ( Fig. 3C View Fig 4 View Fig ). Spiral striation present. Umbilical perforation visible, but umbilicus seems to be closed by the reflected edge of the columellar lip. Aperture ear-shaped, parietal wall oblique with regard to the coiling axis; peristome with two close lips; inner lip thickened and forming a thick callus over the parietal wall; under high magnification 12–15 highly dense ribs visible between the lips. Operculum paucispiral, corneous, thin, outer surface smooth, inner surface with thick peripheral circular edge.

Etymology

The species name refers to the tube-like structure of the dorsal fold on the body whorl just behind the aperture.

Type material

Holotype

NEPAL: Phulchowki Hill , Lalitpur District, 2308–2483 m, 27.574557 N, 85.400842 E, 4 May 2007, P.B. Budha leg. ( CDZMTU025 ).

GoogleMaps

Paratypes

NEPAL: 5 shells from the type locality, same data as holotype ( CDZMTU 026); 4 shells, Baghdwar, Shivapuri-Nagarjun National Park, 2326 m, 27.8131 N, 85.4217 E, 22 Jun. 2007, P.B. Budha leg. ( CDZMTU 027a); 8 shells, Baghdwar area, Shivapuri-Nagarjun National Park, 2412–2502 m, 27.8233 N, 85.3877 E, 24–25 Apr. 2008, R. Devkota and P.B. Budha leg. ( CDZMTU 027b); 2 shells, Dhunche, Langtang National Park, 2056 m, 28.1087 N, 85.2916 E, 3–4 Jun. 2007, P.B. Budha leg. ( CDZMTU 057).

Remarks

Diplommatina fistulata sp. nov. resembles the NE Indian D. pachycheilus , from which it differs by its distinct dorsal fold behind the aperture, smaller size and more slender shape.