Figure 5

Phylogenetic tree reconstructed from the protein coding genes of the mt genomes analysed. Phylogenetic tree reconstructed from the protein coding genes. The coloured boxes following the taxon names comprise the numbers and ratios of nucleotides in the IGRs. Green boxes: presence of significant RHEs; orange boxes; presence of repetitive elements in very low copy numbers; red boxes: no RHEs; uncoloured boxes: undecided due to incomplete sequences. The numbers following the taxon names indicate the GenBank accession numbers. Numbers on the branches are Bayesian posterior probabilities. The asterisks at hexactinellid taxa denote incompletely sequenced genomes. Please note that the long branch of Hexactinellida might influence branching pattern and higher support values (refer to [5, 29, 30]).