Eumetazoa

Phosphatase Glossary: Eumetazoan

Eumetazoans are animals that are not sponges. Sponges are the earliest-branching of metazoans and have considerably less animal-like structure than the eumetazoa.

The next earliest-branching group of metaozans are the placozoa, exemplified by Trichoplax adherens. These are also very simple animals and there is no agreement on whether they should be considered within the Eumetazoa. In the sponge genome paper [1], placozoa were included within the Eumetaoza but excluded from a new clade, called Eumetazoa sensu strictu.

For more, see Wikipedia

References

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