This supports the idea that concatenation
can overcome misleading homoplasy (Townsend et al., 2011). We
note also the possibility that mitochondrial introgression can mislead
phylogenetic analyses, but as our analyses were based on both nuclear and mitochondrial markers, and analyses of the nuclear
28S rRNA gene (Supplemental analyses – Fig. S2) gave identical results
with mtDNA (Supplemental analyses – Fig. S1) and concatenated
datasets (Fig. 3), it seems improbable that introgression
has had any major effect on our phylogenies