Evolution of the Ctenophora

 

The main two hypotheses based on molecular evidence regarding the position of Ctenophora within the metazoans.

The ctenophore lineage diverges at the base of the metazoan tree

The poriferan lineage diverges at the base of the metazoan tree

A conservative interpretation of ctenophore/poriferan relationships to other metazoans

Mnemiopsis.html