Author pages are created from data sourced from our academic publisher partnerships and public sources.
Share This Author
Phylogenomic datasets provide both precision and accuracy in estimating the timescale of placental mammal phylogeny
- M. dos Reis, J. Inoue, M. Hasegawa, R. Asher, P. Donoghue, Ziheng Yang
- Biology, MedicineProceedings of the Royal Society B: Biological…
- 7 September 2012
A powerful Bayesian method is used to analyse 36 nuclear genomes and 274 mitochondrial genomes to reject a pre K–Pg model of placental ordinal diversification, and it is suggested other infamous instances of mismatch between molecular and palaeontological divergence time estimates will be resolved with this same approach.
The Eutherian Mammal Maelestes gobiensis from the Late Cretaceous of Mongolia and the phylogeny of cretaceous eutheria
Maelestes is only the seventh Late Cretaceous eutherian known from the skull and the upper and lower dentitions, and the fifth known from some postcranial elements, and is identified as a member of Cimolestidae sensu Kielan-Jaworowska et al. (2007).
Calibrating and constraining molecular clocks
In explaining the role of fossils in establishing timescales, the historical sequ ence in which key observations were made is reviewed, and a list of 63 key dates is presented, with thorough evidence and error expressions, for a wide range of organisms.
Cretaceous eutherians and Laurasian origin for placental mammals near the K/T boundary
The discovery of a new well-preserved mammal from the Late Cretaceous of Mongolia and a broad-scale phylogenetic analysis that includes all well-known CRETaceous fossils and a wide sample of morphology among Tertiary and recent placentals are reported.
Stem Lagomorpha and the Antiquity of Glires
The results support the hypothesis that rodents and lagomorphs radiated during the Cenozoic and diverged from other placental mammals close to the Cretaceous-Tertiary boundary.
Constraints on the timescale of animal evolutionary history
Calibrations for 88 key nodes across the phylogeny of animals, ranging from the root of Metazoa to the last common ancestor of Homo sapiens, are presented, highlighting the importance of identifying crown (not stem) fossils, levels of confidence in their attribution to the crown, current chronostratigraphic precision, the primacy of the host geological formation and asymmetric confidence intervals.
Relationships of Endemic African Mammals and Their Fossil Relatives Based on Morphological and Molecular Evidence
Analyses of anatomical and DNA sequence data run on a parallel supercomputer that include fossil taxa support the inclusion of tenrecs and golden moles in the Afrotheria, an endemic African clade of placental mammals, and support the position of AfroTheria as well-nested, not basal, within Placentalia.
First combined cladistic analysis of marsupial mammal interrelationships.
- R. Asher, I. Horovitz, M. Sánchez-Villagra
- Biology, MedicineMolecular phylogenetics and evolution
- 1 October 2004
Optimal analyses using direct optimization and those based on the static alignment support the basal positions of peramelians (bandicoots) and Dromiciops ('monito del monte') within Australidelphia, and in all but one case these analyses support a monophyletic Eometatheria, a group consisting of all australidelphians excluding peramelian.
The new framework for understanding placental mammal evolution
- R. Asher, N. Bennett, T. Lehmann
- Biology, MedicineBioEssays : news and reviews in molecular…
- 1 August 2009
Compared with previous hypotheses this tree is remarkably stable; however, some uncertainty persists about the location of the placental root, and (for example) the position of bats within laurasiatheres, of sea cows and aardvarks within afrotheres, and of dermopterans within euarchontoglires.
A Morphological Basis for Assessing the Phylogeny of the “Tenrecoidea” (Mammalia, Lipotyphla)
- R. Asher
- 1 September 1999
A phylogenetic analysis of 35 mammalian taxa focusing on the lipotyphlan family Tenrecidae, based on 193 morphological character states across 71 characters, is undertaken to test several hypotheses…