Thaumastus (Thaumastus) orobaenus ( 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 : 32-33

Taxon classification Animalia Stylommatophora Megaspiridae

Thaumastus (Thaumastus) orobaenus ( d'Orbigny, 1835) Figs 29 A–C, 35

Helix orobaena d’Orbigny 1835: 17; d’Orbigny 1837 [1834-1847]: 293.

Thaumastus orobaenus ; Richardson 1995: 380 (references).

Type locality.

"provincia Yungacensi, republica Boliviana".

Type material.

MNHN 28091, lectotype ( Breure 1975b).

Diagnosis.

Shell relatively small, rimate, brownish with small yellowish blotches, the apex paler, suture slightly crenulate, ascending in front, sculptured with incrassate growth striae and spirally incised lines, forming oblong granules, aperture relatively small, columellar margin narrowly dilated above, entering the aperture with a small twist, peristome whitish, simple, parietal callus thin, whitish.

Dimensions.

Shell height 38.8, diameter 16.8 mm.

Distribution.

Bolivia, Dept. La Paz, Circuata.

Ecoregion.

Bolivian montane dry forests [NT0206].

Remarks.

d’Orbigny (1837 [1834-1847]: 293-294) precised the type locality as "au milieu d’un bois très-humide, au sommet de la montagne dite du Biscachal, près du village de Carcuata".