Bayesian Consensus phylogram. Posterior probabilities (100% probabilities not indicated) and mean branch lengths are derived from 3,000 trees taken from a sample of 5 million generations, sampling every 500th generation. Six separately modeled partitions comprising 1st, 2nd, and 3rd COI codons and separate EF-1α, wingless, and 16S sites were used to generate branch lengths not significantly different from zero derived from likelihood ratio tests of different gene partitions. Green dots indicate 6/6 partitions with branch lengths not significantly different from zero, red dots indicate 5/6 partitions, and yellow dots indicate 4/6 partitions. The intermediate sized open circles indicate branch lengths not significantly different from zero when the data was not partitioned. The large open circle shows the branch where a significant diversification rate change was detected. Abbreviations for Acacia host races are as follows: A. ammophila (amm), A. ancistrophylla (anc), A. cana (can), A. enervia (ene), A. loderi (lod), A. maranoensis (mar), A. melvillei (mel), A. microcephala (mcp), A. microsperma (msp), A. omalophylla (oma), A. oswaldii (osw), A. papyrocarpa (pap), A. pendula (pen) and A. tephrina (tep).