Genus: Test variable, chitinoid; binucleate (Illustrated Guide, 1985). (Illustrated Guide, 1985).
Group: Vulgaroides (Test hemispherical; height 1/2 ~ 4/5 diam.; lacks external shelf or rim)
Species:

->> Description at WPRNO

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A. hemisphaerica test 66 μm

A. hemisphaerica ? or Centropyxis ? 66 μm

A. hemisphaerica cell μm Japan, 1998

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