Taxon classification Animalia Stylommatophora Megaspiridae

Thaumastus (Thaumastus) orcesi Weyrauch, 1967 Figs 24 C–F, 33

Thaumastus (Thaumastus) orcesi Weyrauch 1967: 473, fig. 2; Breure and Borrero 2008: 9; Breure 2012a: 11, pl. 6 figs 59-61.

Type locality.

"Ecuador, cuenca del río Esmeraldas, 35 km al noroeste de Quito, region de Nanegal, 1500 m".

Type material.

FML 3165, holotype.

Additional material.

SMF 156325 (1), paratype.

Diagnosis.

Shell relatively small, irregularly streaked with white and chestnut-brown, sculptured with incrassate growth striae and spirally incised lines, giving the shell a puckered appearance, aperture truncate-ovate, columellar margin twisted, peristome slightly expanded below.

Dimensions.

Shell height 49.4, diameter 23.8 mm.

Distribution.

Ecuador, Prov. Pichincha, Nanegal.

Ecoregion.

Northwestern Andean montane forests [NT0145].

Remarks.

This species is evidently related to Thaumastus (Thaumastus) hartwegi (Pfeiffer in Philippi, 1846), Thaumastus (Thaumastus) integer (Pfeiffer, 1855), and Thaumastus (Thaumastus) flori (Jousseaume, 1897).