Family: Test rigid, chitinoid, often areolar, smooth; pseudostome ventral, round (Illustrated Guide, 1985).
Genus: Test variable, chitinoid; binucleate (Illustrated Guide, 1985).
Arcella vulgaris sp.
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Arcella vulgaris sp.
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Arcella gibbosa sp.
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Arcella sp.
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Arcella vulgaris sp.
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Arcella sp.
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Arcella vulgaris sp.
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Arcella vulgaris sp.
3 clips
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Arcella sp.
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