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Lobosea: Testacealobosia: Arcellinida: Difflugiidae

Difflugia corona
Wallich, 1864

Difflugia corona Genus: Pseudostome lacks lobed collar; test round or oval in cross-section; pseudostome relatively large, with or lacking a collar (Illustrated Guide, 1985).
Species: 100-300 μm long; 120-320 μm wide (diam.); with up to 15 spines at level of broadest diam as a crown; pseudostome round, 4-20 dentate lobes, 50-150 μm diam. (Illustrated Guide, 1985). Test ovoid to spheroid, circular in cross-section; crown broadly rounded, with a variable number of spines; aperture (pseudostome) more or less convex in profile, central and its border multidentate or multlobate; test with fine sand-grains, opaque; 180-230 μm long, about 150 μm wide (diam.) (Kudo, 1966).

Difflugia corona Wallich, test 160 μm long, 166 μm wide, pseudostome 65 μm wide, spiny projections up to 40 μm long, x 200, x 400, x 640, Hannoki numa (pond), Aizu Recreation Park, Aizuwakamatsu city, Fukushima Pref., Japan, May 4, 2005 by Y. Tsukii
scale 100 μm scale 200 μm scale 300 μm; x 200 : scale 50 μm scale 100 μm scale 150 μm; x 400
Difflugia corona Difflugia corona Difflugia corona Difflugia corona
x 200, x 400
Difflugia corona Difflugia corona Difflugia corona

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