Antarcella 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 mosses.