Genus: Test circular, ovoid or discoid; pseudostome eccentric, circular or ovoidal;
with or without spines (Kudo, 1966).
Species:
Centropyxis ecornis,
test 155 μm in diam., pseudostome 50 x 70 μm,
x 400, x 640, rice field, near Ichinoseki Railroad Station, Ichinoseki city, Iwate Pref., Japan, July 24, 2005 by Y. Tsukii
50 μm
100 μm
150 μm; x 400 :
31 μm
63 μm
94 μm; x 640