The evolutionary history of cockatoos (Aves: Psittaciformes: Cacatuidae)
MetadataShow full item record
Cockatoos are the distinctive family Cacatuidae, a major lineage of the order of parrots (Psittaciformes)and distributed throughout the Australasian region of the world. However, the evolutionary history ofcockatoos is not well understood. We investigated the phylogeny of cockatoos based on three mitochondrialand three nuclear DNA genes obtained from 16 of 21 species of Cacatuidae. In addition, five novelmitochondrial genomes were used to estimate time of divergence and our estimates indicate Cacatuidaediverged from Psittacidae approximately 40.7 million years ago (95% CI 51.6–30.3 Ma) during the Eocene.Our data shows Cacatuidae began to diversify approximately 27.9 Ma (95% CI 38.1–18.3 Ma) during theOligocene. The early to middle Miocene (20–10 Ma) was a significant period in the evolution of modernAustralian environments and vegetation, in which a transformation from mainly mesic to xeric habitats(e.g., fire-adapted sclerophyll vegetation and grasslands) occurred. We hypothesize that this environmentaltransformation was a driving force behind the diversification of cockatoos. A detailed multi-locusmolecular phylogeny enabled us to resolve the phylogenetic placements of the Palm Cockatoo(Probosciger aterrimus), Galah (Eolophus roseicapillus), Gang-gang Cockatoo (Callocephalon fimbriatum)and Cockatiel (Nymphicus hollandicus), which have historically been difficult to place within Cacatuidae.When the molecular evidence is analysed in concert with morphology, it is clear that many of thecockatoo species’ diagnostic phenotypic traits such as plumage colour, body size, wing shape and billmorphology have evolved in parallel or convergently across lineages.
Showing items related by title, author, creator and subject.
Application of STR markers in wildlife forensic casework involving Australian black-cockatoos (Calyptorhynchus spp.)White, Nicole; Dawson, R.; Coghlan, Megan; Tridico, S.; Mawson, P.; Haile, James; Bunce, Michael (2012)Parrots and cockatoos are highly prized aviary birds and the demands for such species has fuelled theirillegal trade and harvest from the wild. Here we report on three forensic case studies involving blackcockatoos(Caly ...
Characteristics of Marri (Corymbia calophylla) fruits in relation to the foraging behaviour of the Forest Red-tailed Black Cockatoo (Calyptorhynchus banksii naso)Cooper, Christine; Withers, P.; Mawson, P.; Johnstone, R.; Kirkby, T.; Prince, J.; Bradshaw, S.; Robertson, H. (2003)Forest Red-tailed Black Cockatoos (Calyptorhynchus banksii naso) feed predominantly on seeds of the eucalypt Marri (Corymbia calophylla) and often only from specific feed trees. There was no difference between wet weight ...
Identifying conservation units after large-scale land clearing: a spatio-temporal molecular survey of endangered white-tailed black cockatoos (Calyptorhynchus spp.)White, Nicole; Bunce, Michael; Mawson, P.; Dawson, R.; Saunders, D.; Allentoft, M. (2014)Aim: We examined how the threatened and endemic white-tailed black cockatoos of Western Australia have responded genetically to recent and comprehensive habitat loss with the ultimate aim of identifying units for conservation. ...