Clathrorthalicus corydon (Crosse, 1869) Crosse, 1869

Breure, Abraham S. H. & Avila, Valentin Mogollon, 2016, Synopsis of Central Andean Orthalicoid land snails (Gastropoda, Stylommatophora), excluding Bulimulidae, ZooKeys 588, pp. 1-199 : 40-41

Taxon classification Animalia Stylommatophora Orthalicidae

Clathrorthalicus corydon (Crosse, 1869) comb. n. Figs 39 D–G

Bulimus corydon Crosse 1869: 185; Crosse 1870: 104, pl. 6 fig. 6.

Plekocheilus corydon ; Richardson 1995: 308 (references).

Plekocheilus (Eurytus) corydon ; Breure and Borrero 2008: 5; Borrero and Breure 2011: 55.

Type locality.

“Quito”.

Type material.

MNCN 15.05/8077 (1), MNCN 15.05/13683 (1), MNCN 15.05/21868 (1), syntypes.

Diagnosis.

Shell (elongate-)ovate, creamy ground colour with a nubelous pattern of streaks and spots of russet-brown, indistinctly sculptured with growth striae, suture hardly ascending behind the lip, aperture with well expanded and reflexed peristome.

Dimensions.

Shell height 32, diameter 23.5 mm.

Distribution.

Ecuador, Mindo ( Borrero and Breure 2011).

Ecoregion.

Northwestern Andean montane forests [NT0145].

Remarks.

Crosse did not state on how many specimens his description was based. None of the syntypes found in MNCN correspond exactly with the measurements given by Crosse. However, since no specimens have been located in the MNHN collection, it is assumed that all material was returned by Crosse and is now preserved in Madrid. Breure and Ablett (2015: 39, 45) suggested that this taxon belongs to Clatrorthalicus , and inspection of the MNCN material corroborates this point of view. It may be noted that this species strongly resembles Clathrorthalicus phoebus (Pfeiffer, 1863), and further studies of the variation and distribution of both species are needed to fully assess their taxonomic positions as a synonymy might be involved.