Arcella dentata Ehrenberg ?,
test 125 x 115 μm in diam. (excluding conical projections), μm high, H/W=,
pseudostome 40 x 37 μm wide, P/W=,
x 400, x 640, Akebono marsh (or bog), Nidanuma (Nitanuma), Tsuchiyu-onsen, Fukushima city, Fukushima Pref., Japan, October 28, 2005 by Y. Tsukii
31 μm
63 μm
94 μm; x 640