Rotifera

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Rotifera A phylum of microscopic (0.04–2.00 mm) pseudocoelomate aquatic animals characterized by a crown of cilia at the head end. These are used in locomotion and in some species for feeding: the crown resembles a rotating wheel when the cilia are beating. Rotifers possess jaws and are covered with a layer of chitin (the lorica). There is no circulatory system and gas exchange occurs across the body surface. Some rotifers reproduce by parthenogenesis.

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