Fig. 6From: Comparative analysis of full-length mitochondrial genomes of five Skeletonema species reveals conserved genome organization and recent speciationTime-calibrated phylogeny of 15 mtDNAs based on 34 PCGs in the class Mediophyceae and outgroup (Melosira undulata). We added two Bacillariophyceae species (Synedra acus and Fragilariopsis kerguelensis) to establish appropriate fossil calibration points. The red dots represent calibration points and the 95% highest posterior density interval for node ages are shown with translucent blue barsBack to article page