title: Early metazoan divergence was about 830 million years ago.
abstract: From a total of 22 nuclear genes, we estimate that the divergence time between Drosophila and vertebrates was about 830 million years ago (mya), which is significantly (1% level) earlier than the Cambrian explosion indicated by the early triploblastic fossils (<600 mya).
authors.forename: X
authors.initials: X
authors.lastname: Gu
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D005075:Biological Evolution; D004330:Drosophila / Q000235:genetics*; D010802:Phylogeny; D013045:Species Specificity; D013997:Time Factors; D014714:Vertebrates / Q000235:genetics*