Arcella peruviana  Reczuga et al., 2015

Diagnosis: Test polygonal in cross-section; height usually slightly greater than the maximum diameter (ratio between the height andthe maximum diameter is 0.93–1.26). Test surface formed by angular facets bordered by prominent folds. Tests vary in the arrangement and number of the angular folds. Areolar surface of the test is clearly visible. All investigated specimens were colourless and transparent. Diameter is maximal in the middle part of the test and narrows towards the aperture. The aperture is slightly invaginated, cruciform and located centrally.

Dimensions: diameter 40-55 µm (mean 47.39 µm); aperture 12-17 µm (mean 14.23 µm).

Ecology: Pool in forested, domed tropical peatland. Organic surface layer of leaf and woody litter overlying peat. High humidity. Type locality: Aucayacu peatland, Peruvian Amazonia (−3.93413, −74.411287).

Remarks: This species description is based on 17 empty tests.

Literature:
Reczuga MK, Swindles GT, Grewling L, Lamentowicz, M: Arcella peruviana sp. nov. (Amoebozoa: Arcellinida, Arcellidae), a new species from a tropical peatland in Amazonia. European Journal of Protistology. 51(5): 437-49.