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Lobosea: Arcellinida: Difflugiidae

Difflugia tuberculata
(Wallich, 1864)

Genus: Pseudostome lacks lobed collar; test round or oval in cross-section; pseudostome relatively large, with or lacking a collar (Illustrated Guide, 1985).
Species: 70-150 μm long; 50-130 μm diam.; test like D. lobostoma but of clear tubercules with imbedded quartz granules; pseudostome polygonal, not lobed, 20-50 μm diam., on short collar (Illustrated Guide, 1985).

Difflugia sp. (tuberculata), test 169 μm long, 131 μm wide (test diam.), pseudostome 44 μm diam., Japan, 1998 by Y. Tsukii

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