Maximum parsimony phylogenetic tree. This tree is based on nucleotide sequences of 61 protein-coding genes from 44 taxa. Tree length is 85896, consistency index is 0.41 and retention index is 0.48. Numbers at nodes indicate bootstrap support values; first number is for nucleotide sequence data set, second is for amino acid sequence data set. Species which differ in position according to the analysis of these two types of data are underlined. Branch lengths are proportional to the number of expected nucleotide substitutions; scale bar corresponds to 1000 changes.