Plekocheilus (Eurytus) onca ( d'Orbigny , 1835)

Breure, Abraham S. H. & Avila, Valentin Mogollon, 2016, Synopsis of Central Andean Orthalicoid land snails (Gastropoda, Stylommatophora), excluding Bulimulidae, ZooKeys 588, pp. 1-199 : 14-15

Taxon classification Animalia Stylommatophora Amphibulimidae

Plekocheilus (Eurytus) onca ( d'Orbigny, 1835) Figs 6 A–C, 15

Helix onca d’Orbigny 1835: 8; Breure and Ablett 2011: 25, figs 19 A–C, 19i.

Plecocheilus onca ; Zischka 1953: 78.

Plekocheilus onca ; Richardson 1995: 317 (references).

Type locality.

[Bolivia] "non loin … de Tutulima" ( d’Orbigny 1837 [1834-1847]: 295).

Type material.

NHMUK 1854.12.4.120, lectotype ( Breure and Ablett 2011: 26).

Additional material.

NHMUK 1854.12.4.120 (3), paralectotypes.

Diagnosis.

Shell relatively large, slender, with irregularly spaced reddish-brown spots, sculptured with dense and fine granulation, suture descending in front, aperture oblique elongate-ovate, peristome simple.

Dimensions.

Shell height 66.5, diameter 25.9 mm.

Distribution.

Bolivia, Dept. Cochabamba, near Totolima.

Ecoregion.

Bolivian Yungas [NT0105].

Remarks.

This species is very similar to Plekocheilus (Eurytus) floccosus (Spix in Wagner, 1827), but is decidedly more slender. The reference to non-Bolivian localities ( Cousin 1887: 207) needs to be viewed with much suspicion as likely a misidentification may be involved.