Genus: Test variable, chitinoid; binucleate (Illustrated Guide, 1985). (Illustrated Guide, 1985).
Group: Discoides (Test flattened; height < 1/2 greatest diam.)
Species:
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Arcella sp.
test 70 μm
P.st. 20 μm
Midori-no-ike
Togakushi highland
Nagano, 2005
Arcella sp.
test 65,67 μm
P.st. 26,27 μm
Onnenai
Kushiro marsh
Hokkaido, 2005
Arcella sp.
test 52 μm
P.st. 14 μm
Onnenai
Kushiro marsh
Hokkaido, 2005
Arcella sp.
test 50 μm
P.st. μm
Tennoh
Tessei-cho
Okayama, 2004
