Southern Chestnut-tailed Antbird

The southern chestnut-tailed antbird, or chestnut-tailed antbird, (Sciaphylax hemimelaena) is a species of passerine bird in subfamily Thamnophilinae of family Thamnophilidae, the "typical antbirds". It is found in Bolivia, Brazil, and Peru. == Taxonomy and systematics == The southern chestnut-tailed antbird has a complicated taxonomic history. It was originally described by the English zoologist Philip Sclater in 1857 and given the binomial name Myrmeciza emimelaena. It later acquired the English name "chestnut-tailed antbird" and its current specific epithet hemimelaena. By the early twentieth century it had two recognized subspecies. In 1932 a third subspecies, M. h. castanea, was described. That subspecies was much later recognized as the separate species M. castanea. Some taxonomic systems call it the "northern chestnut-tailed antbird" and the reduced M. hemimelaena the "southern chestnut-tailed antbird". Other systems retained "chestnut-tailed antbird" for M. hemimelaena and called the newly-separated M. castanea "Zimmer's antbird". A molecular phylogenetic study published in 2013 found that genus Myrmeciza, as then defined, was polyphyletic. In the resulting rearrangement to create monophyletic genera M. hemimelaena and M. castanea were moved to a newly erected genus Sciaphylax. The southern chestnut-tailed antbird's two subspecies are the nominate S. h. hemimelaena (Sclater, PL, 1857) and S. h.…