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Lobosea: Testacealobosia: Arcellinida: Lesquereusiidae (formerly Paraquadrulidae)

 Quadrulella symmetrica
Wallich 1863
Quadrula symmetrica Wallich (Kudo 1966)
Quadrula symmetrica (Wallich) F. E. Schulze (Cash 1909)

Quadrulella Genus: Test flask-shaped (Illustrated Guide, 1985).
Species: Test variable in size, about 96 μm long, 60-70 μm wide, 40 μm in thickness; frontal view pyriform, pseudostome slightly convex, dorsoventrally compressed; transparent chitinous plates arranged in series across the surface (Cash, The British Freshwater Rhizopoda and Heliozoa vol. II, 1909).

Quadrulella symmetrica Wallich, test 78 μm long, 42 μm wide, x 640, Komado marsh (or bog), Showa village and Tajima town, Fukushima Pref., Japan, August 22, 2004, by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Quadrulella Quadrulella Quadrulella Quadrulella
Quadrulella Quadrulella Quadrulella

Q. symmetrica (Wallich, 1863): 90-110 μm long, 60-70 μm wide, 35-40 μm deep; test pyriform, siliceous, rectangular plates in rows; oval in cross-section; pseudopods, cylindroid (Illustrated Guide, 1985).

Quadrula symmetrica Wallich: Test pyriform, with quadrangular siliceous or calcareous paltelets (not overlapping); 80-140 μm long, 40-96 μm wide (Kudo, 1966).

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