Genus (Dujardin, 1841): Test round or oval in cross-section; pseudostome anteroventral;
scales in regular rows (Illustrated Guide, 1985).
Species: Test 25-60 μm long, 14-40 μm wide,
pseudostome 6.5-16 μm wide
(Cash, The British Freshwater Rhizopoda and Heliozoa vol. III, 1915).
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