Maximum likelihood-based tree based on analysis of a 658 base pair fragment of COI sequenced from selected Pseudoanthidium species in the P. scapulare complex. Maximum likelihood bootstrap support values, based on 1,000 replicates, are shown over nodes; only nodes with support values >90% are shown. Terminals are labelled with species names, as well as the BOLD sample IDs corresponding to each specimen. Outgroup removed from figure for convenience. Individuals shown in photographs were not those sequenced for analysis A P. scapulare (Photo NJ Vereecken) B P. nanum (Photo NJ Vereecken) C P. tenellum (Photo B Jacobi) D P. stigmaticorne (Photo H Wallays) E P. canariense (Photo G Peña); and F P. jacobii (Photo NJ Vereecken).