animal phylum

Coelenterata was the name for an animal phylum. It is not used now. It was broken down into two separate phyla: the Cnidaria (jellyfish) and the Ctenophora (comb jellies). This change was made on the evidence of molecular evolution. This makes use of protein amino acid sequences, and whole genome DNA analysis.[1][2]


  1. Arthur, Wallace 1997. The origin of animal body plans: a study in evolutionary developmental biology. Cambridge.
  2. Nielsen, Claus 2001. Animal evolution: interrelationships of the living phyla. 2nd ed, Oxford.