Thaumastus (Thaumastiella) glyptocephalus (Pilsbry, 1897)

Breure, Abraham S. H. & Avila, Valentin Mogollon, 2016, Synopsis of Central Andean Orthalicoid land snails (Gastropoda, Stylommatophora), excluding Bulimulidae, ZooKeys 588, pp. 1-199 : 23

Taxon classification Animalia Stylommatophora Megaspiridae

Thaumastus (Thaumastiella) glyptocephalus (Pilsbry, 1897) Figs 19 D–G, 20

Bulimulus glyptocephalus Pilsbry 1897: 21; Pilsbry 1897 [1897-1898]: 93, pl. 5 figs 62-64.

Thaumastus glyptocephalus ; Richardson 1995: 376 (references).

Thaumastus (Thaumastiellus) glyptocephalus ; Ramírez et al. 2003: 282.

Type locality.

“Peru”.

Type material.

ANSP 25675 (1), syntype.

Diagnosis.

Shell relatively small, whitish, surface coarsely wrinkle-striate and conspicuously malleated on the last whorl, apex very obtuse, peristome simple, slightly sinuous in side view.

Dimensions.

Shell height 31, diameter 17 mm.

Distribution.

Peru, Dept. Arequipa, SW Arequipa.

Ecoregion.

Sechura desert [NT1315].

Remarks.

Additional material (ANSP 321960, not seen) suggests the region of occurrence in Dept. Arequipa; the material was collected by W.F. Jenko at 6 km SSW Tiabaya, near Arequipa. This species was considered by Pilsbry as belonging to his group Protoglyptus on account of the axial riblets in the protoconch sculpture; however, this genus is currently understood as distributed in the West Indies and eastern South America. Pilsbry considered this taxon closely related to Bulimulus sarcochrous Pilsbry, 1897. Weywauch (1956b) placed Bulimulus glyptocephalus and Bulimulus sarcochrous Pilsbry, 1897 in his Thaumastus (Thaumastiella) . It should be noted that the habitat at the above mentioned locality is different (i.e., not forested) from the other species.