Ampullaria globosa var. incrassatula Nevill, 1877

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

Ampullaria globosa var. incrassatula Nevill, 1877 Figs 5 , 13A

Ampullaria globosa var. incrassatula Nevill, 1877. Cat. Moll. Ind. Mus. Fasc. E: 4.

Current taxonomic status.

Pila globosa (Swainson, 1822 [in 1821-1822]), junior synonym.

Type locality.

"near Calcutta"; Nevill, leg.

Type material.

Lectotype, by designation of Prashad (1925: 74): NZSI M.2399 (registered 8 January 1894). Paralectotypes: NZSI M.25083/5 (registered 25 September 2001, 8 spms); 5 additional specimens noted by Nevill (1877: 4), location unknown.

Shell dimensions.

Lectotype: SH 32.1 mm, SW 27.5 mm, AH 22.4 mm, AW 16.3 mm. Paralectotypes (8 spms): SH 26.0-30.9 mm, SW 23.3-29.9 mm, AH 18.6-22.5 mm, AW 13.3-16.4 mm, OH 17.4-20.4 mm, OW 10.1-13.3 mm.

Remarks.

Nevill (1877: 4) described the variety based on 14 shells collected by himself from Calcutta and by Major L.W. Wilmer from "the village of Koakally, close to Dum-Dum" [= Dumdum, Kolkata, West Bengal, India]. Nevill (1885: 2) subsequently noted that the 14 specimens comprised 10 from Calcutta collected by himself and four from Dum-Dum collected by Wilmer. One of the Calcutta specimens was catalogued in the original ZSI (then the Indian Museum) register as the “type”, NZSI M.2399. Prashad (1925: 74) noted this specimen as the “Type-specimen”, thereby unambiguously designating it as the lectotype and restricting the type locality to "near Calcutta", as stated by Nevill (1877: 4). Its dimensions and appearance (Fig. 5 ) closely match the dimensions and description given by Nevill (1877: 4). The remaining 13 specimens are paralectotypes, with only eight, all from Calcutta, found in the NZSI collections (NZSI M.25083/5).

Figures

Figure 5. Lectotype of Ampullaria globosa var. incrassatula Nevill, 1877; NZSI M. 2399.

Figure 13. Collection labels. A. Ampullaria globosa var. incrassatula Nevill, 1877; NZSI M. 25083 / 5. B. Ampullaria ampullacea var. javensis Nevill, 1885 (referred to as the unpublished name " subcelebensis "; see text for explanation); NZSI M. 27736 / 6. C. Pachylabra turbinis Race lacustris Annandale, 1920; NZSI M. 10511 / 2 (lectotype).