Rosella

High Quality Content by WIKIPEDIA articles! The genus was described by naturalist Nicholas Aylward Vigors in 1825; the name Platycercus derived from the Ancient Greek "broad-" or "flat-tailed." The relationships with other parrots have been unclear, with the Australian Ringneck cited as a closest relative by some, and the genus Psephotus by others; the plumage of the Western Rosella seen as a link to the latter genus.There are, broadly speaking, three groups of rosella species. They are the blue cheeked species which includes elegans and caledonicus, the white cheeked species, eximius, adscitus and venustus. icterotis is unusual in that it has yellow cheeks. The observed difference in plumage has been reinforced by molecular studies which place the Western as a basal offshoot.