Plekocheilus Guilding, 1828

Breure, Abraham S. H. & Avila, Valentin Mogollon, 2016, Synopsis of Central Andean Orthalicoid land snails (Gastropoda, Stylommatophora), excluding Bulimulidae, ZooKeys 588, pp. 1-199 : 5

Taxon classification Animalia Stylommatophora Amphibulimidae

Genus Plekocheilus Guilding, 1828

Plekocheilus Guilding 1828: 532.

Type species.

Caprella undulata Guilding, 1824, by monotypy.

Diagnosis.

Shell (elongate-)globose to fusiform, rimate, rather thin to solid, height up to ca. 27-ca. 75 mm (study area). Colour light to darker (reddish-)brown, with dark axial zigzag streaks or oblique spiral series of spots. Surface smooth or malleate, in some species with cuticular cavities filled with air. Protoconch granulate or axially wrinkled. Whorls slightly convex, suture hardly to well impressed, descending in front. Aperture sub- to elongate-ovate. Peristome thickened, more or less expanded and reflexed. Columella in several species with a fold.

Distribution.

West Indies, Panama, Colombia, Ecuador, Peru, Bolivia, Brazil, French Guiana, Suriname, Guyana, Venezuela.

Anatomy.

Breure 1978: Plekocheilus (Aeropictus) calliostomus (Dohrn, 1882) [g, r], Plekocheilus (Aeropictus) delicatus (Pilsbry, 1935) [g, r], Plekocheilus (Aeropictus) dissimulans (Preston, 1909) [g, r], Plekocheilus (Aeropictus) veranyi (Pfeiffer, 1848) [g, r], Plekocheilus (Eudolichotis) aurissciuri (Guppy, 1866) [g, r], Plekocheilus (Eudolichotis) glaber (Gmelin, 1791) [g, r], Plekocheilus (Eurytus) ampullaroides (Mousson, 1873) [g, r], Plekocheilus (Eudolichotis) mundiperditi Haas, 1955 [g, r], Plekocheilus (Eurytus) piperitus (Sowerby I, 1837) [g, h, r], Plekocheilus (Eudolichotis) sophiae Breure, 2009 (as Plekocheilus (Plekocheilus) blainvilleanus linterae ) [g]; Breure 2009: Plekocheilus (Eurytus) huberi Breure, 2009 [g], Plekocheilus (Eudolichotis) nebulosus Breure, 2009 [g], Plekocheilus (Eudolichotis) tatei Haas, 1955 [g]; Breure and Schlögl 2010: Plekocheilus (Eurytus) breweri Breure and Schlögl, 2010 [g], Plekocheilus (Plekocheilus) vlceki Breure and Schlögl, 2010 [g]; Breure 2013b: Plekocheilus (Eurytus) huberi Breure, 2009 [m, r], Plekocheilus (Eudolichotis) mundiperditi Haas, 1955 [m, r], Plekocheilus (Eudolichotis) nebulosus Breure, 2009 [m, r], Plekocheilus (Eudolichotis) tatei Haas, 1955 [m, r], Plekocheilus (Plekocheilus) vlceki Breure and Schlögl, 2010 [r]; Breure 2012b: Plekocheilus (Plekocheilus) philippei Breure, 2012 [g, p].

Phylogenetic data.

Breure et al. 2010: Plekocheilus (Plekocheilus) vlceki Breure and Schlögl, 2010; Breure 2013b: Plekocheilus (Aeropictus) succineoides (Petit de la Saussaye, 1840), Plekocheilus (Eudolichotis) glaber (Gmelin, 1791), Plekocheilus (Eurytus) breweri Breure and Schlögl, 2010, Plekocheilus (Eudolichotis) gibbonius (Lea, 1838), Plekocheilus (Eudolichotis) piperatoides Pilsbry, 1901; Breure and Romero 2012: Plekocheilus (Eurytus) breweri Breure and Schlögl, 2010.

Key to subgenera of Plekocheilus in the study area