Genus: Test variable, chitinoid; binucleate (Illustrated Guide, 1985).
Group: Discoides (Test flattened; height < 1/2 greatest diam.)
Species: Test 180-210 μm in diam.
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A. artocrea ?
test 165 μm
P.st. 28 μm
Mida-ga-hara 4
Gassan (mt)
Yamagata, 2006
A. artocrea ?
test 180 μm
P.st. 30 μm
Sankaku-ike
Shiga highland
Nagano, 2005
A. artocrea ?
test 193 μm
P.st. 30 μm
Chigo-ike 4
Shiga highland
Nagano, 2006
A. artocrea ?
test 150 μm
P.st. 30 μm
Ikenokochi m.2
Tsuruga
Fukui, 2006
A. artocrea ?
test 178 μm
P.st. 38 μm
Mizunashi-Yachi
Komado marsh
Fukushima, 2007
