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Antarcella pseudarcella
Antarcella pseudarcella; 106 nucleus – from Penard (1917)

Genus Antarcella  Deflandre, 1928, emend. 1953

Diagnosis: Test in lateral view hemispherical; aperture circular, invaginated. In contrast to Arcella, Antarcella has one ovular nucleus. Contractile vacuole 10 to 15 µm.

Ecology: Herbivorous. Habitat: sphagnum mosses (A. pseudarcella), brackish water (A. atava).

Two species. Refs: Collin (1914), Deflandre (1928a).
Type species: Antarcella atava (Collin, 1914).
NOTE: To distinguish Antarcella species from Arcella spp., staining of the nucleus is recommended.

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