Plekocheilus (Orcesiellus) tenuissimus Plekocheilus tenuissimus Plekocheilus (Aeropictus) tenuissimus Synopsis of Central Andean Orthalicoid land snails (Gastropoda, Stylommatophora), excluding Bulimulidae Breure, Abraham S. H. Avila, Valentin Mogollon ZooKeys 2016 588 1 199 4K6ZM Weyrauch, 1967 Weyrauch 1967 Gastropoda Amphibulimidae Plekocheilus CoL Animalia Plekocheilus (Aeropictus) tenuissimus Stylommatophora 5 6 Mollusca species tenuissimus Aeropictus  Taxon classification Animalia Stylommatophora Amphibulimidae   Plekocheilus (Orcesiellus) tenuissimus Weyrauch 1967: 469, figs 23, 50.  Plekocheilus tenuissimus; Richardson 1995: 323 (references).  Plekocheilus (Aeropictus) tenuissimus; Breure and Borrero 2008: 7; Borrero and Breure 2011: 15, figs 5 A-C; Breure 2012a: 12.  Type locality. "Ecuador, Tandayapa, en la vertiente oriental del cerro Pichincha, approximadamento 2500 m".  Type material. FML 3364, holotype.  Diagnosis. Shell relatively small, with hardly convex whorls, the height of the aperture 0.72 total shell height, suture descending in front, but sharply ascending behind the lip, parietal callus pale greenish-brown.  Dimensions. Shell height 27.8, diameter 17.4 mm.  Distribution. Ecuador, Prov. Pichincha, Tandayapa;?Prov. Carchi, El Laurel ( Breure and Borrero 2008).  Ecoregion. Northwestern Andean montane forests [NT0145].  Remarks. This species occurs on the western slope of the Andes in cloud forest. Fig. 85 C-Dis possibly a living specimen of this species, for which no voucher could be studied.