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.
A. arenaria ?
test 105 μm
P.st. 18 μm
Tane-ike
Togakushi highland
Nagano, 2006
Arcella sp.
A. arenaria ?
test 103 μm
P.st. 18 μm
Yoshi-numa
Nasu-shiobara
Tochigi, 2006
Arcella sp.
A. arenaria ?
test 91 μm
P.st. 17 μm
Ohnuma
Nasu-shiobara
Tochigi, 2006
Arcella sp.
A. arenaria ?
test μm
P.st. μm
Kareki-numa m.
Nikko
Tochigi, 2008
Arcella sp.
A. arenaria ?
test 87 μm
P.st. 17 μm
Aquatic botanical g.
Sawara
Chiba, 2004
Arcella sp.
test 72 μm
P.st. 17 μm
Riverside green l.
Sawara
Chiba, 2004