Until recently, the turquoise-winged parrotlet was considered a subspecies of the
cobalt-rumped parrotlet as
Forpus xanthopterygius spengeli. However, in 2015 Bocalini and Silveira studied morphological differences between subspecies of cobalt-rumped parrotlets and determined that the turquoise-winged parrotlet was its own species,
F. spengeli. This split was supported by Donegan
et al. in 2016. There is continuing debate over the validity of this change. Some taxonomic authorities (including the
American Ornithological Society) do not recognize this change in classification. ==References==