SSU rDNA trees (A, B) and the putative evolutionary development of P3 structure (C). (IMAGE) Science China Press Caption Taxonomic characters are mapped to the phylogenetic trees. Credit ©Science China Press Usage Restrictions Use with credit. License Original 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.