Genus: Test circular, ovoid or discoid; pseudostome eccentric, circular or ovoidal;
with or without spines (Kudo, 1966).
Species:
Test 120-150 x 75-100 μm,
60-75 μm in hight,
pouch-shaped in oral view, round in lateral, tapered toward anterior;
pseudostome 25-30 μm with incurved lips;
several similar species (Illustrated Guide, 1985).
Centrophyxis constricta (Ehrenberg) Leidy ??,
test 125 x 115 μm, μm high, pseudostome x 52 μm,
x 640, No. 7-1, Mida-ga-hara (bog/marsh), Gassan (mountain), Tsuruoka city (formerly Haguro town) & Shonai town (formerly Tachikawa town), Yamagata Pref., Japan, August 3, 2006 by Y. Tsukii
50 μm
100 μm
150 μm; x 400
Images of collecting locality:
No. 7, Mida-ga-hara (bog/marsh), Gassan (mountain), Tsuruoka city (formerly Haguro town) & Shonai town (formerly Tachikawa town), Yamagata Pref., Japan, August 3, 2006 by Y. Tsukii