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 83 μm
P.st. 39 μm
Kannon-numa
Shimogo
Fukushima, 2005
Arcella sp.
test μm
P.st. μm
Kannon-numa
Shimogo
Fukushima, 2008
Arcella sp.
test 87 μm
P.st. 36 μm
Kashibaru m.6
Karatsu
Saga, 2006
Arcella sp.
test 86 x 72 μm
P.st. 42 x 30 μm
Oze-ga-hara
Katashina
Gunma, 2006
