Phylogenetic trees for Lax and Pg genes. Phylogenetic trees obtained for Lax2 and Lax4 (a) and for Pg3, Pg11a and Pg11c genes (b). Bootstrap values (% of 100 re-sampled data set) are indicated for each branch. For presentation convenience, the branch leading to the outgroup was shortened (as indicated by an inclined double segment). Sequences underlined in light grey represent instances were a paralog is placed in the wrong clade when considering the copy specific primers used for its amplification.