Taxon classification Animalia Stylommatophora Amphibulimidae

Plekocheilus (Eurytus) aristaceus (Crosse, 1869) Figs 8 A–C, 14

Bulimus aristaceus Crosse 1869: 185; Crosse 1870: 105, pl. 6 fig. 5.

Plekocheilus aristaceus; Richardson 1995: 302 (references).

Plekocheilus (Eurytus) aristaceus; Breure and Borrero 2008: 5; Breure and Araujo 2015: 87, fig. 1.

Type locality.

"Quito, republica Aequatoris".

Type material.

MNCN 15.05/7180, lectotype (Breure and Araujo 2015).

Diagnosis.

Shell relatively medium-sized, moderately solid, sculptured with granulation, a faint pattern of spiral bands on the last whorl, the interstices about as wide as the bands, last whorl inflated, suture deeply descending in front, peristome hardly expanded and reflexed.

Dimensions.

Shell height 48.3, diameter 22.7 mm.

Distribution.

Ecuador, Prov. Chimborazo, Bucay; Prov. Cotopaxi, Páramo de Sighos; Prov. Pichincha, Rio Pilaton (all Breure and Borrero 2008).

Remarks.

In the MNCN there are three lots labelled ' Bulimus aristaceus Crosse’ which were previously considered as syntypes. These lots appeared not to be conspecific, and only lot MNCN 15.05/7180 is considered as type material of this taxon. This species was recently re-described and re-figured by Breure and Araujo (2015). The figure of Crosse (1870) does not entirely adequately represent the current state of the shell as the colour marks largely have faded away.