Methods
Living and dried specimens of D. arcturi across its geographic range and covering all known Australian and New Zealand morphotypes were examined under dissecting microscope and/or by SEM. Descriptions and, where possible, type specimens for the formerly segregated names from New Zealand were investigated, as well as D. arcturi collections at AD, HO, MEL, OTA, PERTH, Gunn’s and Brown’s collections at K and BM, and personal collections by A. Lowrie and D.E. Murfet.
To assess character variability in the complex, up to five complete specimens per herbarium sheet, representing a total of 354 specimens from 107 accessions