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Lobosea: Testacealobosia: Arcellinida: Difflugina: Heleoperidae

Heleopera sp.

Heleopera Genus: Test chitinous, coloured greyish-rose or deep purple, nearly allways rough with adhering sand-grains; pseudostome narrow, elliptic, notched in lateral view, frontal view of pseudostome more or less convex or truncated, with rounded corners; (Cash, The British Freshwater Rhizopoda and Heliozoa vol. II, 1909).

Heleopera (or Awerintzewia sp. ?), test 83 μm long, 50 μm wide, L/W=1.7, pseudostome 24 μm wide, x 640, Tane-ike (pond), Togakushi highland, Shinano town, Nagano Pref., Japan, June 12, 2005 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
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