Eumetazoa

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Eumetazoa (from Ancient Greek εὖ (eû) 'well', μετά (metá) 'after' and ζῷον (zôion) 'animal'), also known as Epitheliozoa or Histozoa, is a proposed animal subkingdom as a sister group of the basal phylum Porifera (sponges), and is further divided into the more basal clade Ctenophora and the much larger group ParaHoxozoa, which include Cnidaria, Bilateria and Placozoa (the lattermost is now seen as a clade under ParaHoxozoa, based on genetic data). Eumetazoans contrast with poriferans in that they have more organized body plans with differentiated systems, presence of nerves or neuron-like excitable cells, and some clades, the ability of macroscopic motility. The now-obsolete subkingdom Parazoa, which includes primarily Porifera, was previously designated as sister taxon to Eumetazoa. Agnothozoa were once considered an intermediary clade between Parazoa and Eumetazoa, being the sister clade to Parazoa which Eumetazoa would late derivate from. The group primarily encompassed the clade...

Read on Wikipedia · Image Dr. Thomas Clarke Eduard Solà Stanton F. Fink Catriona Munro, Stefan Siebert, Felipe Zapata, Mark Howison, Alejandro Damian-Serrano, Samuel H. Church, Freya E.Goetz, Philip R. Pugh, Steven H.D.Haddoc…, CC BY-SA 4.0