Family: Test rigid, chitinoid, often areolar, smooth; pseudostome ventral, round (Illustrated Guide, 1985).
Genus: Test variable, chitinoid; binucleate (Illustrated Guide, 1985).
Group [Vulgaroides]: Test hemispherical; height 1/2 ~ 4/5 diam.; lacks external shelf or rim.
Species: 70-120 μm diam., 50-75 μm high; test yellow, brwon to black with age; pseudostome round, invaginated; dorsal surface dimpled (Illustrated Guide, 1985).

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A. gibbosa 100 x 75 μm USA, 1999	A. gibbosa 94 x 68 μm Uruguay, 1999	A. gibbosa 94 x 50 μm Japan, 199?	A. gibbosa 65 x 38 μm Jizoh-bori Sannoh Park Saitama, 2005
A. gibbosa 65 x 38 μm Nanbata-shinden Fujimi Saitama, 2004	A. gibbosa 65 x 40 μm Iyari marsh 1 Omachi Nagano, 2007	A. gibbosa μm Okahotto-Yatsu Abiko Chiba, 2008
A. gibbosa v.2 63 x 42 μm Japan, 199?	A. gibbosa v.2 63 x 37 μm Japan, 1999	A. gibbosa 50 x 30 μm Tsuchiura Ibaraki, 2003
Sarcodina sp. cell μm Japan, 1998	A. gibbosa v.2 63 x 25 μm Japan, 199?	A. gibbosa 56 x ? μm Uruguay, 1999	A. gibbosa 56 x 34 μm Uruguay, 1999
A. gibbosa 50 x 25 μm Imou bog Toyohashi Aichi, 2004	A. gibbosa ? 56 x 25 μm Uruguay, 1999	A. gibbosa 55 μm Japan, 199?	A. gibbosa 50 x 25 μm Japan, 1999
A. gibbosa 50 x μm Senjo-ga-hara Nikko Tochigi, 2003	A. gibbosa 58 x 32 μm rice field Osato Saitama, 2004	A. gibbosa 53 x 15 μm Lake Shirakaba Tateshina & Chino Nagano, 2005	A. gibbosa 62 μm φ Karasu riverside Fujioka Gunma, 2004
A. gibbosa 60 x 45 μm 50 x 40 μm Onnenai Kushiro marsh Hokkaido, 2005	A. gibbosa 53 μm Tane-ike Togakushi highland Nagano, 2006

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