Plekocheilus (Eurytus) taylorianus (Reeve, 1849)

Breure, Abraham S. H. & Avila, Valentin Mogollon, 2016, Synopsis of Central Andean Orthalicoid land snails (Gastropoda, Stylommatophora), excluding Bulimulidae, ZooKeys 588, pp. 1-199 : 18

Taxon classification Animalia Stylommatophora Amphibulimidae

Plekocheilus (Eurytus) taylorianus (Reeve, 1849) Figs 5F, 6 D–F, 9B, 15

Bulimus taylorianus Reeve 1849 [1848-1850]: pl. 81 fig. 602; Breure and Ablett 2011: 42, figs 24 A–C, 24i.

Eurytus taylorioides minor Miller 1878: 181, pl. 4 fig. 1; Miller 1879: pl. 7 fig. 1.

Plekocheilus taylorianus ; Richardson 1995: 322 (references, synonymy).

Plekocheilus (Eurytus) taylorianus ; Köhler 2007: 127, fig. 5; Breure and Borrero 2008: 7; Borrero and Breure 2011: 42, figs 15 C–D.

Type locality.

[Ecuador] "Environs of Quito".

Type material.

NHMUK 1874.12.11.271, lectotype ( Breure 1978: 16).

Diagnosis.

Shell relatively large, with reddish-brown oblique zigzags on the penultimate whorl, becoming irregularly spaced dots on the last whorl which is sculptured with fine granulation (Fig. 6F), suture descending in front, rapidly descending behind lip, aperture ovate, peristome simple.

Dimensions.

Shell height 58.5, diameter 31.0 mm.

Distribution.

Ecuador, Prov. Chimborazo, Mt. Chimborazo; Prov. Cotopaxi, Sigchos; Prov. Imbabura, Ibarra; Prov. Napo, Nachiyacu; Prov. Pastaza, Mera; ibid., Puyo; Prov. Pichincha, Nanegal; ibid., Pacto; ibid., Pintag; ibid., Gualea; Prov. Tungurahua, Topo (all Breure and Borrero 2008).

Ecoregion.

Northwestern Andean montane forests [NT0145].

Remarks.

Pilsbry 1895 [1895-1896]: 88 regarded this species as closely resembling Plekocheilus (Eurytus) piperitus (Sowerby I, 1837), with which we concur. Also Plekocheilus (Eurytus) roseolabrum (E.A. Smith, 1877) may be added to this group. Plekocheilus (Eurytus) taylorianus differs mainly in its larger size and the fine granulation on the last whorl (Fig. 5F).