A. caudata, stacked (L) and surface (R); Ecuador, 3000 m.
Argynnia caudata (Leidy, 1879)
Basionym: Nebela caudata Leidy, 1879
Diagnosis: Shell ovoid with a rounded or angulous fundus ornated with 3 to 5 hollow horns (generally 4); covered with polygonal or circular scales, jointing or rarely overlapping.
Dimensions: Length 78—90 µm. My measurements 60—65 µm.
Habitat: Sphagnum-vegetation.
A. caudata, Ecuador