basal animal clade as a sister group of the Porifera
Eumetazoa is a clade which includes all major animal phyla except sponges, and a few other groups of animals, such as the Placozoa. The Eumetazoa have true tissues, neurons, and an embryo that goes through a gastrula stage.
Temporal range: early Ediacaran (perhaps earlier) – Recent
- Borchiellini C. et al. 2001. Journal of Evolutionary Biology 14 (1): 171-179.
- Peterson, Kevin J. et al. 2005. Tempo & mode of early animal evolution: inferences from rocks, Hox, & molecular clocks. Paleobiology 31(2, Supplement): 36-55.