Bcaterial tree of life (IMAGE) University of Queensland Caption Fusobacteria, Gracilicutes and Bacteroidota all branched off from a last bacterial common ancestor. Credit The University of Queensland Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.