Antarcella pseudarcella (Penard, 1917) Deflandre, 1928
Basionym: Arcella pseudarcella Penard, 1917
Diagnosis: General shape as Arcella, small, c. 40-47 µm. Surface with some xenosomes. Yellow to brown. Finely granulated and with some striations. Aperture 12 µm in diameter. Pseudopodia long, pointed or jagged, sometimes branched. Very mobile. Nucleus relatively large with large central nucleolus.
Ecology: Herbivorous. Habitat: Sphagnum, dry mosses.