The Relationships of the Wrentit as Indicated by DNA-DNA Hybridization

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Abstract
The relationships of the Wrentit (Chamaea fasciata) have been debated since its discovery in 1845. The titmice (Parus), babblers (Timaliini), Old World warblers (Sylviini), bushtits (Psaltriparus), wrens (Troglodytidae), and mockingbirds (Mimini) have been suggested as its closest relatives. Many authors have placed the Wrentit in a monotypic family, Chamaeidae. DNA-DNA hybridization comparisons between the homologous nucleotide sequences of the single-copy DNAs of the Wrentit and other passerines indicate that Chamaea is most closely related to the babblers and the Old World warblers, and that the latter two groups are ecotypes of a single, varied, monophyletic assemblage. The Wrentit is approximately equidistant from the sylviines and the timaliines, but ecologically it is a babbler.

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