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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 Penard, test 58 μm in diam., 32 μm high, x 640, rice field near the boundary between Kabutoyama and Tamatsukuri, Osato town, Saitama Pref., Japan, October 17, 2004 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Arcella Arcella Arcella Arcella


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