Plekocheilus (Aeropictus) tenuissimus Weyrauch, 1967

(Figs 5 A–C)

Plekocheilus (Orcesiellus) tenuissimus Weyrauch 1967: 469, figs 23, 50. Type locality: Ecuador, Prov. Pichincha, Tandayapa, 2500 m. Holotype FML 3364. Plekocheilus tenuissimus Weyrauch; Richardson 1995: 323 (references).

Material. Ecuador, Pichincha, Tandayapa, ca. 2500 m, L. Ponce leg.: FML 3364.

Remarks. Plekocheilus tenuissimus was hitherto only known from the type specimen. Recently some material was collected (A. González, pers. comm.), tentatively identified as this species, which suggests that this taxon also occurs in northern Ecuador (Prov. Carchí, El Laurel, 2500 m). Further evidence is needed to confirm its presence in northwestern Ecuador and its relationship with P. calliostoma, to which it may prove to be closely allied.