Figure 2:

Evolutionary genomic analysis of P. canaliculata. (a) Phylogenetic placement of P. canaliculata within the dated tree of molluscs. The estimated divergence time is shown at each branching point, and P. canaliculata is shown in red. (b) Distribution of divergence rate for the class of DNA transposons in mollusc genomes. The divergence rate was calculated by comparing all transposable element (TE) sequences identified in the genome to the corresponding consensus sequence in each TE subfamily. The red arrow indicates that P. canaliculata and C. gigas had a recent explosion of TEs at a divergence rate of ∼4%.