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Lobosea: Testacealobosia: Arcellinida: Difflugina: Lesquereusiidae

 Lesquereusia gibbosa
Thomas & Gauthier-Liévre, 1959

Lesquereusia gibbosa 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: 120-150 μm long, 100-140 μm wide; test with constriction at base of neck; pseudostome round, 28-35 μm long (Illustrated Guide, 1985).

Lesquereusia gibbosa ?, test 165 μm long, 140 μm wide, L/W=1.2, pseudostome 40 μm wide, x 400, x 640, a small pond at Kusatsu Onsen bus terminal, Kusatsu town, Gunma Pref., Japan, June 5, 2005 by Y. Tsukii
scale 50 μm scale 100 μm scale 150 μm; x 400 : scale 31 μm scale 63 μm scale 94 μm; x 640
Lesquereusia Lesquereusia Lesquereusia
Test 170 μm long, 143 μm wide, L/W=1.2, pseudostome 40 μm wide, x 400, x 640
Lesquereusia Lesquereusia Lesquereusia

* Lesquereusia gibbosa Thomas & Gauthier-LiŽvre, 1959: 120-150 μm long, 100-140 μm wide; test with constriction at base of neck; pseudostome round, 28-35 μm long (Illustrated Guide, 1985).

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. (Illustrated Guide, 1985).

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