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Lobosea: Testacealobosia: Arcellinida: Arcellidae

Arcella gibbosa
Penard, 1890

Arcella gibbosa Genus: Test variable, chitinoid; binucleate (Illustrated Guide, 1985).
Group [Vulgaroides]: Test hemispherical; height 1/2 ~ 4/5 diam.; lacks external shelf or rim.
Species: 70-120 μm diam., 50-75 μm high; test yellow, brwon to black with age; pseudostome round, invaginated; dorsal surface dimpled (Illustrated Guide, 1985).


Arcella gibbosa, test 94 μm diam., 50 μm high, dorsal surface dimpled, x 400, Japan, 199? by Y. Tsukii
scale 50 μm scale 100 μm scale 150 μm; x 400
Arcella Arcella


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