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Lobosea: Testacealobosia: Arcellinida: Difflugiidae

 Difflugia pyriformis
Ehrenberg, 1838

Difflugia pyriformis Genus: Pseudostome lacks lobed collar; test round or oval in cross-section; pseudostome relatively large, with or lacking a collar (Illustrated Guide, 1985).
Species: 45-50 μm long for small varieties, 100-600 μm long for large varieties; 25-30 μm wide (test diam.), small; 70-350 μm wide, large; test flask-shaped, base round or polygonal, narrow tapered neck; chitinoid, large imbedded quartz grains; Symbiont, green alga (Kudo, 1966).
Similar species -->> D. oblonga

Difflugia pyriformis ?, test 220 μm long, 150 μm wide, L/W=1.5, pseudostome 40 μm wide, P/W=0.27, x 200, x 400, Imori pond, Myoko-kogen (Myoko highland), Myoko village, Niigata Pref., Japan, November 7, 2004 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Difflugia Difflugia Difflugia Difflugia

D. pyriformis Ehrenberg, 1838: 45-50 μm long for small varieties, 100-600 μm long for large varieties; 25-30 μm wide (test diam.), small; 70-350 μm wide, large; test flask-shaped, base round or polygonal, narrow tapered neck; chitinoid, large imbedded quartz grains; Symbiont, green alga (Kudo, 1966).

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