Linked Life Data

10580990

Source:http://linkedlifedata.com/resource/pubmed/id/10580990

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
12
pubmed:dateCreated
2000-2-3
pubmed:abstractText
Paleontological and molecular data suggest quite different patterns for the early evolution of placental mammals. Paleontological evidence indicates a radiation, with most of the extant orders diverging at approximately the same time, close to the Cretaceous-Tertiary boundary, 65 Myr ago. Molecular evidence suggests a branching pattern of evolution that started much earlier. Resolving this discrepancy requires a consideration of the assumptions that underlie both approaches. It is argued here that the pattern indicated by the molecular approach is the most likely to be correct. If it is correct then either: 1) A diversity of placental mammals remains to be sampled from the Cretaceous, or 2) The placental orders diverged phylogenetically long before they diversified morphologically, implying a decoupling of the evolutionary processes associated with speciation and adaptation. The adaptive diversification of placental mammals may have required the demise of the dinosaurs at the end of the Cretaceous, but it occurred in lineages that had a long prior history of independent existence. 1999.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:status
MEDLINE
pubmed:month
Dec
pubmed:issn
0265-9247
pubmed:author
pubmed:copyrightInfo
Copyright 1999 John Wiley & Sons, Inc.
pubmed:issnType
Print
pubmed:volume
21
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
1052-8; discussion 1059
pubmed:dateRevised
2010-11-18
pubmed:meshHeading
pubmed:year
1999
pubmed:articleTitle
Molecular evidence for the early divergence of placental mammals.
pubmed:affiliation
Human Genetics Group, John Curtin School of Medical Research, Australian National University, Canberra, ACT 0200, Australia. Simon.Easteal@kanu.edu.au
pubmed:publicationType
Journal Article, Review