Pila robsoni Prashad, 1925

Tripathy, Basudev, Sajan, Sheikh & Cowie, Robert H., 2019, Illustrated catalogue of types of Ampullariidae Gray, 1824 (Mollusca, Gastropoda) in the National Zoological Collection of the Zoological Survey of India, with lectotype designations, Zoosystematics and Evolution 96 (1), pp. 1-23 : 1

Pila robsoni Prashad, 1925 Figs 10 , 15B

Pila robsoni Prashad, 1925. Mem. Ind. Mus. 8(2): 85-86, pl. 14, figs 8, 9.

Current taxonomic status.

Pila robsoni Prashad, 1925, valid species.

Type locality.

"near Balapiti, Ceylon" [= Balapitiya, Kegalla district, Sri Lanka]; G. Nevill, leg. ( Nevill 1877: 12).

Type material.

Holotype (original designation): NZSI M.2414 (registered 8 December 1920). Paratypes: NZSI M.21546/4 (registered 5 July 1982, 3 spms).

Shell dimensions.

Holotype: SH 33.9 mm, SW 30.0 mm, AH. 25.8 mm, AW 19.5 mm. Paratypes: SH 17.5-21.7 mm, SW 15.0-19.1 mm, AH 13.4-16.3 mm, AW 8.3-11.3 mm, OH 13.4-13.4 mm, OW 7.6-7.6 mm.

Remarks.

Nevill (1877: 12, 1885: 7) referred his four specimens to Ampullaria moesta Reeve, 1856, but Prashad (1925: 85-86) considered this a misidentification and described his new species, based on Nevill’s four specimens, providing measurements of all four and distinguishing the largest specimen as the “Type” (= holotype). The original catalogue number for the entire type series was 2414. All but the holotype have subsequently been removed from this lot and given the catalogue number NZSI M.21546/4. The photograph of Prashad (1925: pl. 14, fig. 8) is clearly the specimen in NZSI M.2414 (Fig. 10 ), the holotype, based most notably on the erosion/corrosion of the apex; his other photograph ( Prashad 1925: pl. 14, fig. 9) is of one of the paratypes.

Figures

Figure 10. Holotype of Pila robsoni Prashad, 1925; NZSI M. 2414.

Figure 15. Collection labels. A. Pachylabra nevilliana Annandale & Prashad, 1921; NZSI M. 11864 / 2. B. Pila robsoni Prashad, 1925; NZSI M. 2414 (holotype), NZSI M. 21546 / 4 (paratypes).