Definition of Placozoa in English:

Placozoa

plural noun

Zoology
  • A minor phylum that contains a single minute marine invertebrate ("Trichoplax adhaerens" ), which has a flattened body with two cell layers and is the simplest known metazoan.

    • ‘The phylum Placozoa, with its single described species Trichoplax adhaerens, is of great interest to students of metazoan evolution because of its simple composition and its resistance to secure placement within the metazoan tree.’
    • ‘Presently, many species are highlighted for study because of their membership in Cnidaria, Ctenophora, Placozoa, or Porifera.’
    • ‘Of particular interest in this regard are animals in the early diverging non-bilaterian phyla Porifera, Placozoa, Cnidaria, and Ctenophora.’
    • ‘Despite these attempts, relationships among Bilateria, Cnidaria, Ctenophora, Placozoa, and Porifera remain obscure.’
    • ‘Increasing evolutionary diversity for comparative genomics to early-emerging multicellular animals (e.g., Porifera, Placozoa, Cnidaria, Ctenophora) may help to decipher animal origins.’

Origin

Modern Latin (plural), from Greek plakos ‘flat’ + zōia ‘animals’.

Pronunciation

Placozoa

/ˌplakəˈzəʊə/