U
Ulf S. Johansson
Researcher at Swedish Museum of Natural History
Publications - 38
Citations - 2937
Ulf S. Johansson is an academic researcher from Swedish Museum of Natural History. The author has contributed to research in topics: Monophyly & Sister group. The author has an hindex of 21, co-authored 37 publications receiving 2749 citations. Previous affiliations of Ulf S. Johansson include Stellenbosch University & University of Cape Town.
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Journal ArticleDOI
Diversification of Neoaves: integration of molecular sequence data and fossils.
Per G. P. Ericson,Cajsa Lisa Anderson,Tom Britton,Andrzej Elzanowski,Ulf S. Johansson,Mari Källersjö,Jan I. Ohlson,Jan I. Ohlson,Thomas J. Parsons,Dario Zuccon,Gerald Mayr +10 more
TL;DR: The calibration results suggest that Neoaves, after an initial split from Galloanseres in Mid-Cretaceous, diversified around or soon after the K/T boundary, and show that there is no solid molecular evidence for an extensive pre-Tertiary radiation of Neoaves.
Journal ArticleDOI
A Gondwanan origin of passerine birds supported by DNA sequences of the endemic New Zealand wrens
Per G. P. Ericson,Les Christidis,Alan Cooper,Martin Irestedt,Martin Irestedt,Jennifer A. Jackson,Ulf S. Johansson,Ulf S. Johansson,Janette A Norman +8 more
TL;DR: It is demonstrated that the endemic New Zealand wrens (Acanthisittidae) are the sister taxon to all other extant passerines, supporting a Gondwanan origin and early radiation of passerines.
Journal ArticleDOI
Niche filling slows the diversification of Himalayan songbirds
Trevor D. Price,Daniel M. Hooper,Caitlyn D. Buchanan,Ulf S. Johansson,D. Thomas Tietze,D. Thomas Tietze,Per Alström,Per Alström,Urban Olsson,Mousumi Ghosh-Harihar,Farah Ishtiaq,Sandeep Kumar Gupta,Jochen Martens,Bettina Harr,Pratap Singh,Dhananjai Mohan +15 more
TL;DR: It is shown that body size and shape differences evolved early in the radiation, with the elevational band occupied by a species evolving later, which implies that speciation rate is ultimately set by niche filling, rather than by the rate of acquisition of reproductive isolation.
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Phylogeny of Passerida (Aves: Passeriformes) based on nuclear and mitochondrial sequence data.
TL;DR: The African rockfowl and rockjumper are found to constitute the deepest branch within Passerida, but relationships among the other taxa are poorly resolved--only four major clades receive statistical support.
Journal ArticleDOI
Evolution, biogeography, and patterns of diversification in passerine birds
TL;DR: A provisional classification of the passerines is presented in this article, based on the increased understanding of the major patterns of passerine evolution, and the results of DNA-DNA hybridization are shown to be monophyletic.