Popelairia letitiae (Bourcier & Mulsant, 1852), known from two specimens supposedly from Bolivia, appears to be a valid species. Analysis of plumage color and morphometrics indicates that P. letitiae does not represent ...

The holotype of Heliangelus violicollis Salvin, 1891, reportedly from "Sarayacu" on the Amazonian slope of the Ecuadorian Andes, is hypothesized to be a color variant of Heliangelus strophianus (Gould, 1846) from ...

Although critical for enabling in-depth evolutionary, ecological, or conservation-orientated studies, taxonomic knowledge is still scarce for many groups of organisms, including mammals of the order Carnivora. For some of ...

The status and affinities of Permoyscus boylii cordillerae and P. b. sacarensis, both described from El Salvador, are evaluated using principal components analysis. Representative examples of P. aztecus, P. boylii levipes, ...