Maximum credibility Bayesian tree obtained from 63 morphological characters and 30 COI sequences coded to Oecetis and related taxa (all compatible groups shown). Morphological characters in DELTRAN optimization are displayed along the branches. Black symbols indicate unique character changes. Thick lines indicate lineages with asymmetrical spine projection on the phallotheca. Posterior probability support values are displayed near the node branches, values greater than 50% (majority consensus) are highlighted in orange, strongly supported clades (>90%) are shown in red. Taxa with included COI data are highlighted with *. Non-Neotropical Oecetis species distribution are indicated with the following abbreviations: AF Afrotropical, AU Austral, OR Oriental, PA Palearctic, NA Nearctic.