V.  Trunz, Packer, L., Vieu, J., Arrigo, N., and Praz, C. J., ?Comprehensive phylogeny, biogeography and new classification of the diverse bee tribe Megachilini: Can we use DNA barcodes in phylogenies of large genera??, Molecular Phylogenetics and Evolution, vol. 103, pp. 245-259, 2016.