Results 21 to 30 of about 12,882 (250)

Morphological disparity of early ammonoids: A geometric morphometric approach to investigate conch geometry

open access: yesActa Palaeontologica Polonica, 2023
Fossils of Devonian ammonoids are abundant and well-preserved in the Anti-Atlas of Morocco; as such they provide an invaluable record of regional morphological disparity changes (diversity of shapes) that characterise the first steps of ammonoid ...
NINON ALLAIRE   +6 more
doaj   +1 more source

Has frugivory influenced the macroecology and diversification of a tropical keystone plant family? [PDF]

open access: yesResearch Ideas and Outcomes, 2017
Seed dispersal by fruit-eating animals is a pivotal ecosystem function in tropical forests, but the role that frugivores have played in the biogeography and macroevolution of species-rich tropical plant families remains largely unexplored.
W. Daniel Kissling
doaj   +2 more sources

Linking population‐level and microevolutionary processes to understand speciation dynamics at the macroevolutionary scale

open access: yesEcology and Evolution, 2021
Although speciation dynamics have been described for several taxonomic groups in distinct geographic regions, most macroevolutionary studies still lack a detailed mechanistic view on how or why speciation rates change. To help partially fill this gap, we
Laura Rodrigues Vieira de Alencar   +1 more
doaj   +1 more source

Dietary specialization is linked to reduced species durations in North American fossil canids [PDF]

open access: yesRoyal Society Open Science, 2018
How traits influence species persistence is a fundamental question in ecology, evolution and palaeontology. We test the relationship between dietary traits and both species duration and locality coverage over 40 million years in North American canids, a ...
Mairin Balisi   +2 more
doaj   +1 more source

Evolution of brilliant iridescent feather nanostructures

open access: yeseLife, 2021
The brilliant iridescent plumage of birds creates some of the most stunning color displays known in the natural world. Iridescent plumage colors are produced by nanostructures in feathers and have evolved in diverse birds.
Klara Katarina Nordén   +2 more
doaj   +1 more source

The completeness of the fossil record of plesiosaurs, marine reptiles from the Mesozoic [PDF]

open access: yesActa Palaeontologica Polonica, 2017
Plesiosaurs were a highly successful group of marine reptiles occurring worldwide in the Jurassic and Cretaceous, but to date few studies have focused on their preservation through time.
Samuel L. Tutin, Richard J. Butler
doaj   +1 more source

Experimental macroevolution [PDF]

open access: yesProceedings of the Royal Society B: Biological Sciences, 2016
The convergence of several disparate research programmes raises the possibility that the long-term evolutionary processes of innovation and radiation may become amenable to laboratory experimentation. Ancestors might be resurrected directly from naturally stored propagules or tissues, or indirectly from the expression of ancestral genes in contemporary
openaire   +2 more sources

Making the most of clade selection [PDF]

open access: yes, 2017
Clade selection is unpopular with philosophers who otherwise accept multilevel selection theory. Clades cannot reproduce, and reproduction is widely thought necessary for evolution by natural selection, especially of complex adaptations.
Doolittle, W. Ford
core   +1 more source

Population Size and the Rate of Language Evolution: A Test Across Indo-European, Austronesian, and Bantu Languages

open access: yesFrontiers in Psychology, 2018
What role does speaker population size play in shaping rates of language evolution? There has been little consensus on the expected relationship between rates and patterns of language change and speaker population size, with some predicting faster rates ...
Simon J. Greenhill   +8 more
doaj   +1 more source

Ecomorphological diversification of squamates in the Cretaceous [PDF]

open access: yesRoyal Society Open Science, 2021
Squamates (lizards and snakes) are highly successful modern vertebrates, with over 10 000 species. Squamates have a long history, dating back to at least 240 million years ago (Ma), and showing increasing species richness in the Late Cretaceous (84 Ma ...
Jorge A. Herrera-Flores   +2 more
doaj   +1 more source

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