Results 31 to 40 of about 689 (206)

Ignoring Fossil Age Uncertainty Leads to Inaccurate Topology and Divergence Time Estimates in Time Calibrated Tree Inference

open access: yesFrontiers in Ecology and Evolution, 2020
Time calibrated trees are challenging to estimate for many extinct groups of species due to the incompleteness of the rock and fossil records. Additionally, the precise age of a sample is typically not known as it may have occurred at any time during the
Joëlle Barido-Sottani   +10 more
doaj   +1 more source

So Volcanoes Created the Dinosaurs? A Quantitative Characterization of the Early Evolution of Terrestrial Pan-Aves

open access: yesFrontiers in Earth Science, 2022
The early Mesozoic is marked by several global-scale environmental events, including the emplacement of large igneous provinces, such as the Siberian Traps, Wrangellia, and Central Atlantic Magmatic Province (CAMP).
Max Cardoso Langer   +3 more
doaj   +1 more source

A revision of the diagnosis and affinities of the metriorhynchoids (Crocodylomorpha, Thalattosuchia) from the Rosso Ammonitico Veronese Formation (Jurassic of Italy) using specimen-level analyses [PDF]

open access: yesPeerJ, 2019
Neptunidraco ammoniticus is a thalattosuchian crocodylomorph from the Rosso Ammonitico Veronese Formation (RAVF, Middle Jurassic) of northern Italy. Erected from one partial specimen, Neptunidraco is pivotal in reconstructing thalattosuchian evolution ...
Andrea Cau
doaj   +2 more sources

Fossils matter: improved estimates of divergence times in Pinus reveal older diversification

open access: yesBMC Evolutionary Biology, 2017
Background The taxonomy of pines (genus Pinus) is widely accepted and a robust gene tree based on entire plastome sequences exists. However, there is a large discrepancy in estimated divergence times of major pine clades among existing studies, mainly ...
Bianca Saladin   +6 more
doaj   +1 more source

Early cephalopod evolution clarified through Bayesian phylogenetic inference

open access: yesBMC Biology, 2022
Background Despite the excellent fossil record of cephalopods, their early evolution is poorly understood. Different, partly incompatible phylogenetic hypotheses have been proposed in the past, which reflected individual author’s opinions on the ...
Alexander Pohle   +8 more
doaj   +1 more source

Impacts of Taxon-Sampling Schemes on Bayesian Molecular Dating under the Unresolved Fossilized Birth-Death Process [PDF]

open access: yes, 2021
Abstract Evolutionary timescales can be estimated using a combination of genetic data and fossil evidence based on the molecular clock. Bayesian phylogenetic methods such as tip dating and total-evidence dating provide a powerful framework for inferring evolutionary timescales, but the most widely used priors for tree topologies and ...
Arong Luo   +4 more
openaire   +1 more source

Notes on the birth–death prior with fossil calibrations for Bayesian estimation of species divergence times [PDF]

open access: yesPhilosophical Transactions of the Royal Society B: Biological Sciences, 2016
Constructing a multi-dimensional prior on the times of divergence (the node ages) of species in a phylogeny is not a trivial task, in particular, if the prior density is the result of combining different sources of information such as a speciation process with fossil calibration densities. Yang & Rannala (2006
openaire   +3 more sources

The Fossilized Birth-Death Process: A Coherent Model of Fossil Calibration for Divergence Time Estimation

open access: yes, 2013
42 total pages including: 29 text pages, 5 tables, and 12 figures. Work presented at Evolution 2013 (http://www.slideshare.net/trayc7/heath-evolution-2013)
Heath, Tracy A.   +2 more
openaire   +2 more sources

Mastication‐Induced Electrical Stimulation Activates Prg4+ Chondroprogenitors for Osteoarthritis Therapy

open access: yesAdvanced Science, EarlyView.
This study presents a ″trash‐to‐treasure″ strategy that converts harmful joint overloads into beneficial electrical cues. The biodegradable MagPie, by providing piezoelectrical stimulation and releasing Mg2+ during mastication, exerts synergistic pro‐regenerative and anti‐inflammatory effects on Prg4+ cells via the ECM‐mediated FAK‐PI3K‐Akt axis ...
Shi‐Yang Feng   +10 more
wiley   +1 more source

Sphenodontian phylogeny and the impact of model choice in Bayesian morphological clock estimates of divergence times and evolutionary rates

open access: yesBMC Biology, 2020
Background The vast majority of all life that ever existed on earth is now extinct and several aspects of their evolutionary history can only be assessed by using morphological data from the fossil record.
Tiago R. Simões   +2 more
doaj   +1 more source

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