Eumetazoa

Examples of Eumetazoa in the following topics:

• Complex Tissue Structure

  • The animal kingdom is divided into Parazoa (sponges) and Eumetazoa (all other animals).
  • Animals with true tissues are in the group Eumetazoa ("true animals").

• Constructing an Animal Phylogenetic Tree

  • The current understanding of evolutionary relationships between animal, or Metazoa, phyla begins with the distinction between "true" animals with true differentiated tissues, called Eumetazoa, and animal phyla that do not have true differentiated tissues (such as the sponges), called Parazoa.
  • Both Parazoa and Eumetazoa evolved from a common ancestral organism that resembles the modern-day protists called choanoflagellates.
  • Eumetazoa are subdivided into radially-symmetrical animals and bilaterally-symmetrical animals and are classified into clade Radiata or Bilateria, respectively.
  • All other Eumetazoa are members of the Bilateria clade.