Lithonida - AbsoluteAstronomy.com

Lithonida is an order of calcareous sponges in the class Calcarea in the animal

Animal

Animals are a major group of multicellular, eukaryotic organisms of the kingdom Animalia or Metazoa. Their body plan eventually becomes fixed as they develop, although some undergo a process of metamorphosis later on in their life. Most animals are motile, meaning they can move spontaneously and...

phylum Porifera.

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