Family: Test usually more or less compressed; pseudostome narrowly oval or slit-like.
Genus:
(Illustrated Guide 2nd).
Species:
(Illustrated Guide 2nd).
Porosia bigibbosa (Archer 1867) Leidy ?,
test 260 μm long, 170 μm wide, L/W=1.5,
pseudostome 60 μm wide, P/W=3.5,
scales μm long, μm wide,
x 400, x 640, Kenashitai (marsh), Hakkoda mountain, Aomori city, Aomori Pref., Japan, July 17, 2005 by Y. Tsukii 31 μm
63 μm
94 μm; x 640
Family: Test usually more or less compressed; pseudostome narrowly oval or slit-like.
31 μm
