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P. irregularis 40 µm – Photomicrograph Eckhard Voelcker

Genus Paraquadrula Deflandre, 1932

Diagnosis: shell transparent, broad oval, slightly compressed, composed of secreted quadratic or rectangular calcite plates in rows, sheet-like cement; nucleus vesicular.

Paraquadrula irregularis, 31 µm – stacked image
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