Thaumastus (Thaumastus) robertsi robertsi Pilsbry, 1932

Breure, Abraham S. H. & Avila, Valentin Mogollon, 2016, Synopsis of Central Andean Orthalicoid land snails (Gastropoda, Stylommatophora), excluding Bulimulidae, ZooKeys 588, pp. 1-199 : 33

Taxon classification Animalia Stylommatophora Megaspiridae

Thaumastus (Thaumastus) robertsi robertsi Pilsbry, 1932 Figs 23 A–D, 34

Thaumastus robertsi Pilsbry 1932: 390, pl. 27 figs 3, 6; Richardson 1995: 387 (references).

Type locality.

"Rio Jelashte, at about 4500 ft., Dept. of San Martin, Peru".

Type material.

ANSP 159920, holotype.

Diagnosis.

Shell relatively medium-sized, brownish, with lighter subsutural and peripheral bands, sculptured with fine, irregular wrinkles and spaced spiral series of little granules, suture crenulate, aperture with a brown coloured band behind the peristome, which is thickened and slightly expanded.

Dimensions.

Shell height 63.7, diameter 31.6 mm.

Distribution.

Peru, Dept. Amazonas, Chachapoyas (NHMUK 1896.6.23.3-4); Dept. San Martin, Rio Jelashte [E of Leymebamba], ca. 1500 m.

Ecoregion.

Peruvian Yungas [NT0153].

Remarks.

Upon further collecting and careful studies, preferably in conjunction with molecular research, this species may prove to be closely related to Thaumastus (Thaumastus) melanocheilus (Nyst, 1845).