Maximum-likelihood phylogenetic tree of Chorioptes spp. based on complete ITS-2 DNA sequences. The corresponding sequences of Psoroptes and Otodectes were used as the outgroup (midpoint rooted). Bootstrap values are given as percentages for each node. The scale indicates the expected number of nucleotide substitutions. Database accession numbers of the sequences are given in brackets. The sequences from the Chorioptes mites from Swedish moose are in boldface.