Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Phylogenetic relationship among animals. Phylogenetic relationship among multicellular animals elucidated by molecular clock methods based on protein sequence data is shown. Only animal groups relevant to this review are included. The divergence times for the Arthropod/Nematoda or Mollusca/Annelida were not analyzed by this method and are arbitrarily shown in this figure
