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Lobosea: Testacealobosia: Arcellinida: Difflugiidae

 Difflugia oblonga
Ehrenberg

Difflugia Genus: Pseudostome lacks lobed collar; test round or oval in cross-section; with or lacking a collar (Illustrated Guide, 1985).
Species: Test pyriform, flask-shaped, or ovoid; neck variable in length; aperture terminal, typically circular; test composed of angular sand-grains, diatoms; 60-580 μm by 40-240 μm (Kudo, 1966).

Difflugia oblonga Ehrenberg, test 90 μm long, 55 μm wide, L/W=1.6, pseudostome 33 μm wide, P/W=0.60, x 640, Iroha-numa (marsh), Zao mountain, Yamagata city, Yamagata Pref., Japan, July 9, 2005 by Y. Tsukii
scale 50 μm scale 100 μm scale 150 μm; x 400
Difflugia oblonga Difflugia oblonga

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