Mitochondrial COI phylogeny of Nearctic Scolytus. Phylogram of one of 2958 most parsimonious trees (L = 1431, CI = 0.356, RI = 0.809) generated from a heurtistic search of 1000 stepwise random additions with TBR in PAUP*. Numbers above the node indicate bootstrap values (>50). Bremer support values are listed below the node. Non-monophyletic species are indicated in red. Mean intraspecific nucleotide differences (listed next to each taxon) and mean interspecific nucleotide differences (right of solid line) are given. Taxa highlighted in red were not recovered as monophyletic.