Planulozoa
Encyclopedia
Planulozoa is a proposed clade
including the Cnidaria
(sea anemones and jellyfish) and the Bilateria
(all the more complex animals including flatworms, insects and vertebrates). The clade excludes the Ctenophora (comb jellies).
Clade
A clade is a group consisting of a species and all its descendants. In the terms of biological systematics, a clade is a single "branch" on the "tree of life". The idea that such a "natural group" of organisms should be grouped together and given a taxonomic name is central to biological...
including the Cnidaria
Cnidaria
Cnidaria is a phylum containing over 9,000 species of animals found exclusively in aquatic and mostly marine environments. Their distinguishing feature is cnidocytes, specialized cells that they use mainly for capturing prey. Their bodies consist of mesoglea, a non-living jelly-like substance,...
(sea anemones and jellyfish) and the Bilateria
Bilateria
The bilateria are all animals having a bilateral symmetry, i.e. they have a front and a back end, as well as an upside and downside. Radially symmetrical animals like jellyfish have a topside and downside, but no front and back...
(all the more complex animals including flatworms, insects and vertebrates). The clade excludes the Ctenophora (comb jellies).