Genus: Pseudostome lacks lobed collar; test round or oval in cross-section; pseudostome at end of
bent neck; test more or less coiled or folded (Illustrated Guide, 1985).
Species:
Test 100 μm long, 80 μm wide
(Cash, The British Freshwater Rhizopoda and Heliozoa vol. II, 1909).
Lesquereusia modesta Rhumbler ?,
test 160 μm long, μm wide,
x 400, x 640, Kaga city, Ishikawa Pref., Japan, November 2000 by Y. Tsukii
50 μm
100 μm
150 μm; x 400 :
31 μm
63 μm
94 μm; x 640
Cell division or conjugation ?
Ingesting algae
Lesquereusia spiralis (Ehrenberg, 1840):
95-190 μm long,
75-150 μm wide,
50-100 μm deep;
test like flask, neck against body; with secreted imbedded siliceous particles;
pseudostome circular 30-50 μm diam.