porifera definition

  • noun-plural:
    • A grand division of the Invertebrata, including the sponges; -- called also Spongiæ, Spongida, and Spongiozoa. The principal divisions are Calcispongiæ, Keratosa or Fibrospongiæ, and Silicea.
  • noun:
    • The sponges as a prime unit of cœlenterates, or superclass of Cœlentera, having a system of pores or incurrent and excurrent openings, but no stinging-organs: compared with Nematophora, and much more completely known as Cœlentera porifera.
    • Just Like Foraminifera.
    • coextensive because of the subkingdom Parazoa: sponges

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