The parrots of the New World have been known to Europeans since Columbus remarked upon them in his journal in 1492. Systematic descriptions of the birds were first available in German naturalist Georg Marcgraf's Historia Naturalis Brasiliae published in 1648, and English naturalist Mark Catesby's two-volume Natural History of Carolina, Florida and the Bahama Islands published in London in 1731 and 1743.
The New World parrots are monophyletic, and have been geographically isolated for at least 30–55 million years by molecular dating methods. Though fairly few fossils of modern parrots are known, most of these are from tribe Arini of macaws and parakeets; the oldest are from 16 million years ago. They attest that modern genera were mostly distinct by the Pleistocene, a few million years ago.
Neotropical parrots comprise at least two monophyletic clades, one of primarily long-tailed species such as the macaws, conures, and allies, and the other of primarily short-tailed parrots such as amazons and allies.[3]
A new species, the bald parrot or orange-headed parrot, was discovered as recently as 2002.
Taxonomy
Neotropical parrots belong to the subfamilyArinae[4] which along with the African or Old World parrots comprise the family Psittacidae, one of three families of true parrots.
The taxonomy of the neotropical parrots is not yet fully resolved, but the following subdivision is supported by solid studies.[5][6][7][8][9][10]
^Leo Joseph; Alicia Toon; Erin E. Schirtzinger; Timothy F. Wright (2011). "Molecular systematics of two enigmatic genera Psittacella and Pezoporus illuminate the ecological radiation of Australo-Papuan parrots (Aves: Psittaciformes)". Molecular Phylogenetics and Evolution. 59 (3): 675–684. doi:10.1016/j.ympev.2011.03.017. PMID21453777.
^Schweizer, M.; Seehausen, O.; Güntert, M.; Hertwig, S. T. (2009). "The evolutionary diversification of parrots supports a taxon pulse model with multiple trans-oceanic dispersal events and local radiations". Molecular Phylogenetics and Evolution. 54 (3): 984–94. doi:10.1016/j.ympev.2009.08.021. PMID19699808.
^de Kloet, RS; de Kloet SR (2005). "The evolution of the spindlin gene in birds: Sequence analysis of an intron of the spindlin W and Z gene reveals four major divisions of the Psittaciformes". Molecular Phylogenetics and Evolution. 36 (3): 706–721. doi:10.1016/j.ympev.2005.03.013. PMID16099384.
Ribas, C.; Gaban-Lima, R.; Miyaki, C.; Cracraft, J. (2005). "Historical biogeography and diversification within the Neotropical parrot genus Pionopsitta (Aves: Psittacidae)". Journal of Biogeography. 32 (8): 1409–1427. doi:10.1111/j.1365-2699.2005.01289.x.