 The species was first described in 1875 by ornithologist George Newbold Lawrence , who placed this species in the genus Myiarchus . However , in 1893 it was split from Myiarchus into the new , monotypic genus Deltarhynchus by Robert Ridgway because of its shorter and broader bill , more rounded wings , and partially streaked underparts . This change was upheld in 1901 by Richard Bowdler Sharpe and by subsequent authors . However , in 1977 ornithologist Melvin Alvah Traylor Jr . , while upholding its status as a monotypic genus , said that the species should be lumped back into Myiarchus if its nesting habits were similar to those of that genus . These doubts were put to rest by Wesley Lanyon 's research of the flycatcher in 1979 , which confirmed the bird 's placement in a monotypic genus . 
