Protein sequences indicate that turtles branched off from the amniote tree after mammals.Caspers G.J., Reinders G.J., Leunissen J.A.M., Wattel J., de Jong W.W.View abstractCited forNUCLEOTIDE SEQUENCE [MRNA]TissueLensCategorySequencesSourceUniProtKB reviewed (Swiss-Prot)PubMedEurope PMCJ. Mol. Evol. 42:580-586 (1996)Cited in2