Endothyrella brahma (Godwin-Austen, 1879)

Pall-Gergely, Barna, Budha, Prem B., Naggs, Fred, Backeljau, Thierry & Asami, Takahiro, 2015, Review of the genus Endothyrella Zilch, 1960 with description of five new species (Gastropoda, Pulmonata, Plectopylidae), ZooKeys 529, pp. 1-70 : 26-27

Taxon classification Animalia Pulmonata Plectopylidae

Endothyrella brahma (Godwin-Austen, 1879) Figure 16B

Endothyrella brahma 1879a Helix (Plectopylis) brahma Godwin-Austen: Journal of the Asiatic Society of Bengal, 48 (2): 3-4, plate 1, fig 3. ["near Brahmakund, eastern Assam, at 1,000 feet elevation"].

Endothyrella brahma 1887 Helix (Plectopylis) brahma , - Tryon: Manual of Conchology …, 2 (3): 164, Plate 36, figs 35-37.

Endothyrella brahma 1894 Plectopylis brahma , - Pilsbry: Manual of Conchology, 2 (9): 145.

Endothyrella brahma 1897d Plectopylis brahma , - Gude: Science Gossip, 4: 170-171, figs 63 a–c.

Endothyrella brahma 1899c Plectopylis (Chersaecia) brahma , - Gude: Science Gossip, 6: 148.

Endothyrella brahma 1899d Plectopylis (Chersaecia) brahma , - Gude: Science Gossip, 6: 175, 176.

Endothyrella brahma 1914b Plectopylis (Chersaecia) brahma , - Gude: The Fauna of British India …: 74, 113-114, 54 a–c.

Endothyrella brahma 1915 Plectopylis (Chersaecia) brahma , - Gude: Records of the Indian Museum, 8: 509, 511.

Endothyrella brahma 1920 Plectopylis (Chersaecia) brahma , - Gude: Proceedings of the Malacological Society of London, 14 (2-3): 63.

Types.

Brahamakund, E. Assam, NHMUK 1903.7.1.751. (6 syntypes, Figure 16B).

Additional material examined.

Assam, leg. Hungerford, NHMUK 1891.3.17.362-364 (3 specimens); Assam, Brahmakund, coll. Godwin-Austen, NHMUK 20150144/27 (several shells juvenile); Brahmakund, NHMUK 20150145/8.

Diagnosis.

Shell very small, sinistral, with narrow umbilicus, depressed conical dorsally, conspicuous radial sculpture without hairs; callus very strong; palatal plicae short, straight, with many small denticles at their posterior ends, standing along a vertical line; lamella oblique, with three horizontal plicae anteriorly, the lowermost is in contact with the lower end of the lamella; besides these anterior plicae, there is a short upper plica above the lamella, and long lower plica close to the lower suture, which runs until the aperture.

Measurements

(in mm): D: 8.1-8.2, H: 4.6 (n = 2, type series).

Differential diagnosis.

Endothyrella brahma can be distinguished from all other Endothyrella species by the presence of three parallel, horizontal parietal plicae anterior to the lamella. See also Table 5.

Distribution.

The species is known from the type locality only (Figure 10).