The Bryozoa (Phylum Ectoprocta), also known as Polyzoa in some older literature, is a group of small, sessile, colonial, filter-feeding animals. The majority of the members are strictly marine, but there are at least 65 freshwater species worldwide (Wood & Wood, 2000). The phylum is divided into three classes: the Stenolaemata which are exclusively marine; the Gymnolaemata which are mostly marine but have a few freshwater members in the order Ctenostomata; and the Phylactolaemata which are exclusively freshwater. Only species in the Phylactolaemata produce encapsulated dormant structures called statoblasts, and thus this discussion will be confined mainly to this group.
CITATION STYLE
Francis, D. R. (2001). Bryozoan Statoblasts (pp. 105–123). https://doi.org/10.1007/0-306-47671-1_6
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