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Lobosea: Testacealobosia: Arcellinida: Arcellidae

Arcella
Ehrenberg, 1832

Family: Test rigid, chitinoid, often areolar, smooth; pseudostome ventral, round (Illustrated Guide, 1985).
Genus: Test variable, chitinoid; binucleate (Illustrated Guide, 1985).
->> Description at WPRNO Google Image Search
Group: Altoides (Test taller than greatest diam.)
Arcella
Arcella sp.
125 x 115 μm
124 x 105 μm
115 x 115 μm
Uruguay, 1999
Arcella
A. mitrata ?
120 x 135 μm
Hyoutan-ike
Shiga highland
Nagano, 2005
Arcella
A. mitrata ?
x 130 μm
Mida-ga-hara
Gassan (mt)
Yamagata, 2006
Arcella
A. mitrata ?
μm
Hanadate South WL
Yuri-Honjo
Akita, 2008
Arcella
A. mitrata ?
70-77 x 60-71μm
Uruguay, 1999

Group: Vulgaroides (Test hemispherical; height 1/2 ~ 4/5 diam.; lacks external shelf or rim)
Arcella
Arcella sp.
107 x 85 μm
Uruguay, 1999
Arcella
Arcella sp.
90-95 x 68 μm
near Okubo ike
Shinano
Nagano, 2004
Arcella
Arcella sp.
μm
Maimeno-ike 1
Norikura highland
Nagano, 2007
Arcella
Arcella sp.
32 x 55 μm
Numa-no-hara m.
Madarao highland
Niigata, 2005
Arcella
A. vulgaris
72 samples
test 19-150 μm
199?-2008
Arcella
A. vulgaris
72 samples
test 19-150 μm
199?-2008
Arcella
A. vulgaris
72 samples
test 19-150 μm
199?-2008
Arcella
A. vulgaris
72 samples
test 19-150 μm
199?-2008
Arcella
A. gibbosa ?
test 85-87 μm
Shin-Akitsu
Higashi-Murayama
Tokyo, 2004
Arcella
A. gibbosa
24 samples
50-100 μm φ
199?-2008
Arcella
A. gibbosa
24 samples
50-100 μm φ
199?-2008
Arcella
A. gibbosa
24 samples
50-100 μm φ
199?-2008
Arcella
A. hemisphaerica ?
3 samples
test 66 μm
Japan, 1988
Arcella
Arcella sp.
test μm
Uruguay, 1999
Arcella
Arcella sp.
test μm
Uruguay, 1999

Group: Discoides (Test flattened; height < 1/2 greatest diam.)
Arcella
Arcella sp.
test 283 μm
Onnenai
Kushiro marsh
Hokkaido, 2005
Arcella disccoides
A. megastoma
test 250 μm
Toneri Park
Adachi-ku
Tokyo, 2001
Arcella megastoma
A. megastoma
test 316, 280 μm
Toneri Park
Adachi-ku
Tokyo, 2005
Arcella
A. discoides
6 samples
83-165 μm
1999-2005
Arcella dentata
A. dentata
6 samples
125-155 μm
2003-2008
Arcella
A. artocrea ?
5 samples
150-193 μm
2005-2007
Arcella
A. catinus
or A. arenaria ?
test 113 μm
P.st. 32 μm
Numa-no-hara m.
Madarao highland
Niigata, 2005
xxxx
A. arenaria ?
6 samples
72-105 μm
2004-2008
Arcella
Arcella sp.
test 103 μm
P.st. 26 μm
Numa-no-hara m.
Madarao highland
Niigata, 2005
Arcella
Arcella sp.
test 130 μm
P.st. 55 μm
Kurome river
Asaka
Saitama, 2006
Arcella
Arcella sp.
test 100 μm
P.st. 47 x 19 μm
Ikenokochi m.4
Tsuruga
Fukui, 2006
Arcella
Arcella sp.
test 81 μm
P.st. 43 x 19 μm
Karakemi m.1
Omachi
Nagano, 2007
Arcella
Arcella sp.1
4 samples
83-87 μm
2005-2008
Arcella
Arcella sp.
test 67 x 58 μm
P.st. 23 x 21 μm
near Lake Aoki
Omachi
Nagano, 2006
Arcella
Arcella sp.2
4 samples
test 50-70 μm
2004-2005


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Arcella
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