Nebela guttata Kosakyan & Lara, 2012

Diagnosis: The test is colorless or slightly brownish, tear- or drop-shaped, with a protruding narrow neck, laterally slightly compressed, with small lateral pores (number of pores can vary). Shell composed of small particles (likely obtained from preys, e.g. euglyphid testate amoebae), which often can be covered with thin layer of organic cement. The aperture is oval, curved.

Dimensions: According to Kosakyan & Lara (2012): Shell length 80—89 µm; width 53—65 µm; aperture 20—22 µm; neck 7.4 ± 0.3 µm high (n = 5). My measurements: Length 51—78 µm

Habitat: Peatlands, in Sphagnum.

Geographical distribution: Bulgaria, Switzerland, likely more widespread.

Remarks: Nebela guttata resembles N. tincta, from which it differs by its narrow protruding curved aperture and slender drop shape of the test.

These six shells of Nebela guttata were present in one droplet. It shows the large variation in shell structure within a population. The plate scales come from the shells of Trinema and Corythion species.