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Lobosea: Testacealobosia: Arcellinida: Arcellidae

Arcella discoides
Ehrenberg, 1871

Arcella discoides Genus: Test variable, chitinoid; binucleate (Illustrated Guide, 1985).
Group: Discoides (Test flattened; height < 1/2 greatest diam.)

Species: Diam. 90-150 μm, height 25-30 μm; pseudostome, round, 30-40 μm; with or without ring of pores (Illustrated Guide, 1985).

Arcella discoides Ehrenberg, test diameter 83 μm, with two nuclei (binucleate), by H. Yoshino

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