Species diversity of Fergusonina Malloch gall flies (Diptera: Fergusoninidae) forming leaf bud galls on snow gum (Eucalyptus pauciflora Sieb. ex Spreng. complex), with a description of a new species from Tasmania
A new species ofFergusonina(Diptera: Fergusoninidae) fly is described from terminal leaf bud galls (TLBGs) from theEucalyptus paucifloraSieb. ex Spreng. (snow gum) species complex from Australia.Fergusonina tasmaniensisNelson sp.n. is the first species from the genusFergusoninato be described from Tasmania and the fourth from this host complex.Fergusonina tasmaniensissp.n. can be distinguished from the other snow gumFergusoninaspecies by differences in adult size, markings on the mesonotum and the male genitalia, and from all other describedFergusoninaby host specificity and differences in adult colouration, setation, genitalia and the morphology of the larval dorsal shield. In a molecular phylogeny of the snow gum-inhabitingFergusoninaspecies,F. tasmaniensissp.n. was resolved as monophyletic, and sister (mean distance = 3.82%) to a clade comprisingF. daviesaeNelson and Yeates andF. omlandiNelson and Yeates (mean interspecific distance = 2.48%).