Concatenated Neighbour Joining Tree based on six Multilocus Sequence Typing (MLST) gene loci (elongation factor 1 (ef1), beta tubulin (tubb), RNA polymerase large subunit 1 (Rpb1), beta actin (actb), elongation factor 2 (ef2) and succinate dehydrogenase complex flavoprotein subunit A (sdha) using average states to resolve polymorphic sites. Different groupings are represented by vertical bars. Two distinct groups can be visualized; Group 1 (Tasmania) and Group 2 (Ireland, Scotland, the USA, Canada and Norway). Branch support represents bootstrap values (1000 replications). Blue values represent the bootstrap support for the SNP duplication method (1000 replications).