Diplommatina exserta Godwin-Austen 1886
- Dataset
- The genus Diplommatina Benson, 1849 (Gastropoda: Caenogastropoda: Diplommatinidae) in Nepal, with the description of seven new species
- Rank
- SPECIES
Classification
- kingdom
- Animalia
- phylum
- Mollusca
- class
- Gastropoda
- order
- Architaenioglossa
- family
- Diplommatinidae
- genus
- Diplommatina
- species
- Diplommatina exserta
description
Figs 3 B, 9 B
diagnosis
Diagnosis Measurements (n = 3): SH 3.4 – 3.5 mm, SW 1.7 – 1.8 mm, Wh 7.5. Dextral, apical whorls slowly increasing in size, resulting in a slender conical spire. Penultimate and body whorls nearly equal in width. Constriction between parietal lips of the peristome at AeP (Fig. 9 B). Two parietalis: Prt 1 long and strongly developed, gradually elevated inner side of the body whorl, Prt 2 short (Fig. 3 B 3). Two vertical palatalis: Vpt 1 stronger and close to the constriction, Vpt 2 short. One long horizontal palatalis, touching the inner parietal lip (Fig. 9 B). Columellaris strong. Columellar tooth prominent. Protoconch smooth, Wh 2.0, with minute evenly distributed pits, no radial ribs (Fig. 3 B 1). Teleoconch with widely spaced radial ribs; 7 – 8 ribs / 0.5 mm on the penultimate whorl; 8 – 10 ribs / 0.5 mm on the body whorl towards the aperture (Fig. 3 B 2, B 4). Ribs moderately prominent. Very fine spiral striation present. Umbilicus open. Aperture inversely C-shaped, due to the straight columellar edge of the lip. Peristome with two close lips; under high magnification 2 – 3 ribs seen between the two lips. Parietal wall of the aperture extending to nearly halfway up the body whorl.
discussion
Remarks The most similar species are Diplommatina exilis W. T. Blanford, 1863 from Myanmar (Hanley & Theobald 1876: pl. 119, fig. 10) and D. pullula Benson, 1859 from “ Rungun on the West of Darjiling ” (Hanley & Theobald 1876: pl. 119, fig. 7). Compared to D. exserta, the apical whorls are wider in D. pullula and more tumid in D. exilis.
materials_examined
Material examined NEPAL: 4 shells, Siddha Cave, Tanahun, 695 m, 27.94544 N, 84.422244 E, 24 Oct. 2008, P. B. Budha and R. Devkota leg. (CDZMTU 024).