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Lobosea: Testacealobosia: Arcellinida: Difflugiidae

 Difflugia oblonga
var. venusta (Penard) Cash

Difflugia oblonga Genus: Pseudostome lacks lobed collar; test round or oval in cross-section; pseudostome relatively large, 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).
Similar species -->> D. scaplellum; D. acuminata;

Difflugia oblonga Ehrenberg ?, test 143 μm long, 65 μm wide, L/W=2.2, pseudostome 26 μm wide, P/W=0.40, x 400, x 640, Mida-ga-hara (bog), Gassan (mountain), Haguro & Tachikawa town, Yamagata Pref., Japan, July 10, 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
Difflugia oblonga Difflugia oblonga
Test 140 μm long, 70 μm wide, L/W=2.0, pseudostome 30 μm wide, P/W=0.43, x 400, x 640
Difflugia oblonga Difflugia oblonga

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