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Lobosea: Testacealobosia: Arcellinida: Arcellidae

 Arcella sp.
Ehrenberg, 1832

Arcella Genus: Test variable, chitinoid; binucleate (Illustrated Guide, 1985).
Group [Altoides]: Test taller than greatest diam.
Species:

Arcella sp. (Arcella mitrata or similar species ?), test 125 μm in diam., 115 μm high, x 200, x 400, x 640, Uruguay, November 1999, photo by Y. Tsukii
scale 50 μm scale 100 μm scale 150 μm; x 400 : scale 31 μm scale 63 μm scale 94 μm; x 640
Arcella Arcella Arcella Arcella

Arcella sp., test 124 μm in diam., 105 μm high, x 400, x 640, Uruguay, November 1999, photo by Y. Tsukii
scale 50 μm scale 100 μm scale 150 μm; x 400 : scale 31 μm scale 63 μm scale 94 μm; x 640
Arcella Arcella Arcella
Test μm in diam., μm high, x 400, x 640
Arcella Arcella Arcella Arcella
Arcella Arcella

Arcella sp., test 115 μm in diam., 115 μm high, x 100, x 200, x 400, x 640, Uruguay, November 1999, photo by Y. Tsukii
scale 50 μm scale 100 μm scale 150 μm; x 400 : scale 31 μm scale 63 μm scale 94 μm; x 640
Arcella Arcella Arcella Arcella Arcella Arcella

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