| phylogeny of "core gruiformes" (aves: grues) and resolution of the limpkin-sungrebe problem. | opinions on the systematic relationships of birds in the avian order gruiformes have been as diverse as the families included within it. despite ongoing debate over monophyly of the order and relationships among its various members, recent opinion has converged on the monophyly of a "core" group of five families classified as the suborder grues: the rails (rallidae), the cranes (gruidae), the limpkin (aramidae), the trumpeters (psophiidae), and the finfoots (heliornithidae). we present dna seque ... | 2007 | 17419074 |