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metazoa

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metazoa

Another name for animals. It reflects a former system of classification, in which there were two main divisions within the animal kingdom, the multicellular animals, or metazoa, and the single-celled ‘animals’ or protozoa. The protozoa are no longer included in the animal kingdom, so only the metazoa remain.
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Metazoa are by definition mobile at some stage of their life cycle and ingest other organisms for sustenance.
Fossils push animal life back millions of years: study by AFP / AFP Global Edition
Soft-bodied Metazoa and animal trace fossils in the Vendian and early Cambrian.
Trace fossils Didymaulichnus cf. tirasensis and Monomorphichnus isp. ... by Jensen, Soren; Mens, Kaisa / Proceedings of the Estonian Academy of Sciences: Geology
ANIMALIA 1,320,000 MESOZOA METAZOA 1,320,000 Porifera (sponges) 10,000 Cnidaria (hydras, jellyfish, corals, etc) 10,000 Platyhelminthes (flatworms) 20,000 Nematoda (roundworms) 25,000 Echinodermata (sea uchins, etc.
Endangered Invertebrates: The Case for Greater Attention to ... by Black, Scott Hoffman; Shepard, Matthew; Allen, Melody Mackey / Endangered Species Update
 
 
 
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