Two deeply sampled genome-scale analyses recover different animal roots, making data composition and evolutionary model part of the claim.
Represented range0–0 Ma
RegionsGlobal living-taxon sequence samples
CladesPorifera · Ctenophora · Metazoa
Claim ledger
topology · contested
One 1,719-gene analysis supports Porifera-sister under site-heterogeneous models, whereas an independently expanded ctenophore sample supports Ctenophora-sister; the animal root remains model- and sampling-sensitive.