Definitions for placozoa
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Wiktionary
placozoa(Noun)
placozoan
U.S. National Library of Medicine
Placozoa
A phylum of primitive invertebrate animals that exemplify a simple body organization. Trichoplax adhaerens is considered a key species for early metazoan evolution.
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"placozoa." Definitions.net. STANDS4 LLC, 2013. Web. 22 May 2013. <http://www.definitions.net/definition/placozoa>.

