Who Speaks with a Forked Tongue?

J. B. Losos, D. M. Hillis, H. W. Greene
2012 Science  
A B Evolutionary reversal or ancestral state? One of the traits inferred to have reversed evolutionarily in the lizard molecular tree is the ancestral tongue morphology, shown here for the iguanian Pogona barbatus (A); the scleroglossan Heloderma suspectum (B) exhibits the derived, bifi d state.
doi:10.1126/science.1232455 pmid:23239723 fatcat:ljrv3lfcpnfzrnaxj7lwtd54iy