Thaumastus (Thaumastus) sangoae (Tschudi in Troschel, 1852)

Breure, Abraham S. H. & Avila, Valentin Mogollon, 2016, Synopsis of Central Andean Orthalicoid land snails (Gastropoda, Stylommatophora), excluding Bulimulidae, ZooKeys 588, pp. 1-199 : 34

Taxon classification Animalia Stylommatophora Megaspiridae

Thaumastus (Thaumastus) sangoae (Tschudi in Troschel, 1852) Figs 24 A–B, 34

Bulimus sangoae Tschudi in Troschel 1852: 189, pl. 6 fig. 1.

Thaumastus sangoae ; Richardson 1995: 381 (references).

Thaumastus (Thaumastus) sangoae ; Ramírez et al. 2003: 282.

Type locality.

“Urwäldern von Sangoa in Peru".

Type material.

Not located.

Diagnosis.

Shell relatively large, brownish, with lighter subsutural and peripheral bands, sculptured with fine, irregular growth striae, the last whorl subcancellated and somewhat beaded, aperture subovate, with a brown coloured band behind the lip.

Dimensions.

Shell height 81, diameter 40 mm.

Distribution.

Peru, Dept. Junin, Río Pangoa valley; ibid., 16.8 km WNW San Ramón ( Breure 1978).

Ecoregion.

Southwest Amazon moist forests [NT0166].

Remarks.

As Morelet (1863: 155) has pointed out, the name sangoae was probably an error and refers to Río Pangoa in Dept. Junín, "qui prend sa source sur les hauteurs d’Andamarca et qui donne son nom à la vallée qu’elle arrose dans la partie inférieure de son cours". The colour pattern of Troschel’s figure suggests that this species may be close to Thaumastus (Thaumastus) robertsi Pilsbry, 1932 and Thaumastus (Thaumastus) melanocheilus (Nyst, 1845).