Bayesian tree showing the Oecetis falicia group. Morphological characters in DELTRAN optimization are displayed along the branches; clades without supporting morphological characters were collapsed. 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, PA Palearctic, NA Nearctic. Illustrations of the male genitalia in lateral view based on original descriptions are depicted next to each species label, showing also for some species the lateral view of the phallic apparatus and the ventral view of the inferior appendage.