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Description of Pterocystis

Centroheliozoa with a periplast with an internal layer of tangential plate-scales and external one of radial spicules. The latter consist of a shaft and a thin membranous basal region which may extend along the shaft and may form a stalk-like protrusion at the base of the spicule. The membranous region is not clearly differentiated into lateral and basal regions as in Echinocystis. Ten species all from freshwater, Type species: P. pteracantha (Siemensma, 1981) Siemensma et Roijackers, 1988.


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Source: BioPedia

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