 
 Porosia bigibbosa
Porosia bigibbosa
Jung 1942
|  Family: Test usually more or less compressed; pseudostome narrowly oval or slit-like. Genus: 
(Illustrated Guide 2nd).
 Species:
 | 
Porosia bigibbosa (Archer 1867) Leidy ?, 
test 265 μm long, 177 μm wide, L/W=1.5, pseudostome 70 μm wide, 
x 400, x 640, Oze-shokubutu-kenkyu-mihonen, Oze-ga-hara (Oze marsh), Katashina village, Gunma Pref., Japan, June 29, 2006 by Y. Tsukii
 31 μm
 31 μm
 63 μm
 63 μm
 94 μm; x 640
 94 μm; x 640
 
 
 
Images of collecting locality: 
Oze-shokubutu-kenkyu-mihonen, Oze-ga-hara (Oze marsh), Katashina village, Gunma Pref., Japan, June 29, 2006 by Y. Tsukii
 
 
 
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