SUMMARYFord, J. 1985. Phylogeny of the acanthizid warbler genusGerygonebased on numerical analyses of morphological characters. Emu 86: 12–22.Cladograms, both rooted and unrooted, and phenograms of species in the genusGerygonewere obtained by numerical analyses of a matrix of thirty morphological characters divided into various states. Phylogenetic relationships so deduced were generally in agreement and indicated that the ancestral gerygone was possibly a pale-bellied bird, somewhat resembling bothG. moukiand G. fusca, which originated in Australo-Papua. No evidence was obtained in support of a Tumbunan zoogeographical origin. The gerygones of the islands in the South-west Pacific have been derived from two Australian lineages: thefuscaandmoukigroups. Those of the Malayo-Indonesian chain of islands appear to be offshoots ofG. olivaceoand perhapsG. fuscastocks. The relationships ofG. dorsalis, as assessed by the dendrograms of this study, are not entirely in accord with previous views, forG. dorsalisappears to be the sister group of theG. magnirostris—G. chrysogastercomplex.