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Lobosea: Testacealobosia: Arcellinida: Arcellidae

Arcella vulgaris
Ehrenberg, 1832

Arcella Genus: Test variable, chitinoid; binucleate (Illustrated Guide, 1985).
Species: Test 30-100 μm in diameter; height of test about 1/2 the diameter; dome of hemispherical test evenly convex; pseudostome cicular, central; colorless, yellow, or brown; two vesicular nuclei; several contractile vacuoles (Kudo, 1966).
Test 100-150 μm in diameter, 50-80 high (Illustrated Guide, 1985).


Arcella vulgaris small variety ?, test 62 μm in diam., 32 μm in height, pseudostome invaginated, x 640, rice field, Nanbata-shinden, Fujimi city, Saitama Pref., Japan, October 24, 2004 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Arcella Arcella Arcella Arcella


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