Maximum Likelihood inferred CO1 gene tree phylogeny for the 1,032 Aphonopelma specimen dataset. Species delimitations followed the integrative methodological approach outlined in Hamilton et al. (2014). Black circles denote bootstrap support ≥ 80%; white squares denote bootstrap support ≤ 80%. White triangles indicate species clades supported with ≥ 80% bootstrap support; grey triangles indicate lineages with putative mitochondrial introgression events. Asterisks at the tips of branches indicate undescribed diversity.