Thaumastus (Thaumastus) taunaisii ( Ferussac , 1822)

Breure, Abraham S. H. & Avila, Valentin Mogollon, 2016, Synopsis of Central Andean Orthalicoid land snails (Gastropoda, Stylommatophora), excluding Bulimulidae, ZooKeys 588, pp. 1-199 : 36

Taxon classification Animalia Stylommatophora Megaspiridae

Thaumastus (Thaumastus) taunaisii ( Ferussac, 1822) Figs 28 A–B

Helix (Cochlostyla) taunaisii Férussac 1822 [1821-1822]: 48.

Bulimus achilles Pfeiffer 1853 b: 378.

Thaumastus (Thaumastus) taunaisii ; Richardson 1995: 383 (references, synonymy).

Thaumastus (Thaumastus) achilles ; Ramírez et al. 2003: 282; Simone 2006: 152, fig. 514.

Type locality.

[Brazil] "in ripis fluvii Amazonum".

Type material.

Not located.

Additional material.

NHMUK 1975268, lectotype of Bulimus achilles Pfeiffer ( Breure 1978: 32); NHMUK 1975269 (2), paralectotypes.

Diagnosis.

Shell relatively medium-sized, tawny coloured with some axial streaks of (purplish- to reddish-)brown, a light girdle at the periphery, sculptured with growth striae and fine, somewhat undulating, spiral, incised lines, aperture subovate, peristome somewhat thickened and hardly expanded at basal margin.

Dimensions.

Shell height 58.0, diameter 25.5 mm.

Distribution.

Brazil ( Simone 2006).

Remarks.

The record for Peru by Ramírez et al. (2003) of this eastern Brazilian species may be due to a misidentification and needs further confirmation.