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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 Ehrenberg, test 290 μm long, 220 μm wide, L/W=1.3, pseudostome 70 μm wide, P/W=0.32, x 200, x 400, x 640, Tanohara marsh, Shiga highland, Yamanouchi town, Nagano Pref., Japan, June 1, 2006 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Difflugia pyriformis Difflugia pyriformis Difflugia pyriformis Difflugia pyriformis Difflugia pyriformis Difflugia pyriformis

Images of collecting locality: Tanohara marsh, Shiga highland, Yamanouchi town, Nagano Pref., Japan, June 1, 2006 by Y. Tsukii

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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