Proarticulata

Proarticulata is a phylum in the kingdom Animalia comprising early bilaterally symmetrical beings that lived during the Ediacaran period.

The body of a proarticulatan is divided into isomers, with individual isomers making up half of the width of the body organised in an alternating pattern along the long axis of their body.

Classes
Proarticulata contains the following classes
 * Vendiamorpha
 * Dipleurozoa
 * Cephalozoa