Plekocheilus (Eurytus) lynciculus (Deville & Hupe , 1850)

Breure, Abraham S. H. & Avila, Valentin Mogollon, 2016, Synopsis of Central Andean Orthalicoid land snails (Gastropoda, Stylommatophora), excluding Bulimulidae, ZooKeys 588, pp. 1-199 : 12-13

Taxon classification Animalia Stylommatophora Amphibulimidae

Plekocheilus (Eurytus) lynciculus (Deville & Hupe, 1850) Figs 11 A–C, 15

Bulimus lynciculus Deville and Hupé 1850: 640, pl. 15 fig. 1.

Plekocheilus (Eurytus) jacksoni Pilsbry 1939: 1, fig. 2.

Plekocheilus lynciculus ; Richardson 1995: 316 (references, synonymy).

Plekocheilus (Eurytus) lynciculus ; Breure and Borrero 2008: 6; Borrero and Breure 2011: 30, figs 14C, 17 C–D.

Type locality.

"Mission de Sarayacu, sur les bords de la rivière de l’Ucuyali, Pérou”.

Type material.

Not located.

Additional material.

ANSP 170694, holotype of Plekocheilus (Eurytus) jacksoni Pilsbry.

Diagnosis.

Shell relatively medium-sized, with dots and longitudinal streaks of (reddish-)brown, sculptured with impressed spiral grooves crossing the growth striae, suture descending in front, aperture ovate, peristome slightly expanded.

Dimensions.

Not given; ( jacksoni Pilsbry) shell height 45.4, diameter 25.7 mm.

Distribution.

Colombia ( Borrero and Breure 2011). Ecuador, Prov. Napo, Nachiyacu; Prov. Tungurahua, Rio Pastaza watershed. Peru, Dept. Loreto, Sarayacu.

Ecoregion.

Eastern Cordillera real montane forests [NT0121], Iquitos varzea [NT0128].

Remarks.

The sentence "sur les bords de la rivière de l’Ucuyali” leaves little doubt about the type locality, although there is also a locality named Sarayacu in Ecuador, Prov. Pastaza. We have been unable to locate the type specimens of Deville and Hupé, but close examination of their original figure leads us to believe that the shell exhibits the same longitudinal plication as seen on the holotype of jacksoni Pilsbry. We now tentatively consider the specimens figured by Borrero and Breure (2011: figs 17 G–J, as Plekocheilus (Eurytus) piperitus ) to be conspecific with Deville and Hupé’s species.