Cambrian Sessile, Suspension Feeding Stem-Group Ctenophores and Evolution of the Comb Jelly Body Plan (Current Biology)

The origin and interrelationships of comb jellies (ctenophores) have been subject to much recent debate. Zhao et al. describe several fossil forms related to ctenophores. They trace comb rows back to tentacular organs surrounding the mouth of a polypoid ancestor. These fossils support a ctenophore affiliation with cnidarians in the animal tree of life.