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Mitogenomic analyses of eutherian relationships

Arnason, Ulfur LU and Janke, Axel LU (2002) In Cytogenetic and Genome Research2002-01-01+01:00 96(1-4). p.20-32
Abstract
Reasonably correct phylogenies are fundamental to the testing of evolutionary hypotheses. Here, we present phylogenetic findings based on analyses of 67 complete mammalian mitochondrial (mt) genomes. The analyses, irrespective of whether they were performed at the amino acid (aa) level or on nucleotides (nt) of first and second codon positions, placed Erinaceomorpha (hedgehogs and their kin) as the sister group of remaining eutherians. Thus, the analyses separated Erinaceomorpha from other traditional lipotyphlans (e.g., tenrecs, moles, and shrews), making traditional Lipotyphla polyphyletic. Both the aa and nt data sets identified the two order-rich eutherian clades, the Cetferungulata (comprising Pholidota, Carnivora, Perissodactyla,... (More)
Reasonably correct phylogenies are fundamental to the testing of evolutionary hypotheses. Here, we present phylogenetic findings based on analyses of 67 complete mammalian mitochondrial (mt) genomes. The analyses, irrespective of whether they were performed at the amino acid (aa) level or on nucleotides (nt) of first and second codon positions, placed Erinaceomorpha (hedgehogs and their kin) as the sister group of remaining eutherians. Thus, the analyses separated Erinaceomorpha from other traditional lipotyphlans (e.g., tenrecs, moles, and shrews), making traditional Lipotyphla polyphyletic. Both the aa and nt data sets identified the two order-rich eutherian clades, the Cetferungulata (comprising Pholidota, Carnivora, Perissodactyla, Artiodactyla, and Cetacea) and the African clade (Tenrecomorpha, Macroscelidea, Tubulidentata, Hyracoidea, Proboscidea, and Sirenia). The study corroborated recent findings that have identified a sister-group relationship between Anthropoidea and Dermoptera (flying lemurs), thereby making our own order, Primates, a paraphyletic assembly. Molecular estimates using paleontologically well-established calibration points, placed the origin of most eutherian orders in Cretaceous times, 70-100 million years before present (MYBP). The same estimates place all primate divergences much earlier than traditionally believed. For example, the divergence between Homo and Pan is estimated to have taken place approximate to 10 MYBP, a dating consistent with recent findings in primate paleontology. Copyright (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Cytogenetic and Genome Research2002-01-01+01:00
volume
96
issue
1-4
pages
20 - 32
publisher
Karger
external identifiers
  • pmid:12438776
  • wos:000178731700005
  • scopus:0036044139
ISSN
1424-859X
DOI
10.1159/000063023
language
English
LU publication?
yes
id
0289cc5e-4754-44b1-ad99-fd43750effbf (old id 325041)
date added to LUP
2007-08-07 15:53:38
date last changed
2017-08-13 03:42:54
@article{0289cc5e-4754-44b1-ad99-fd43750effbf,
  abstract     = {Reasonably correct phylogenies are fundamental to the testing of evolutionary hypotheses. Here, we present phylogenetic findings based on analyses of 67 complete mammalian mitochondrial (mt) genomes. The analyses, irrespective of whether they were performed at the amino acid (aa) level or on nucleotides (nt) of first and second codon positions, placed Erinaceomorpha (hedgehogs and their kin) as the sister group of remaining eutherians. Thus, the analyses separated Erinaceomorpha from other traditional lipotyphlans (e.g., tenrecs, moles, and shrews), making traditional Lipotyphla polyphyletic. Both the aa and nt data sets identified the two order-rich eutherian clades, the Cetferungulata (comprising Pholidota, Carnivora, Perissodactyla, Artiodactyla, and Cetacea) and the African clade (Tenrecomorpha, Macroscelidea, Tubulidentata, Hyracoidea, Proboscidea, and Sirenia). The study corroborated recent findings that have identified a sister-group relationship between Anthropoidea and Dermoptera (flying lemurs), thereby making our own order, Primates, a paraphyletic assembly. Molecular estimates using paleontologically well-established calibration points, placed the origin of most eutherian orders in Cretaceous times, 70-100 million years before present (MYBP). The same estimates place all primate divergences much earlier than traditionally believed. For example, the divergence between Homo and Pan is estimated to have taken place approximate to 10 MYBP, a dating consistent with recent findings in primate paleontology. Copyright},
  author       = {Arnason, Ulfur and Janke, Axel},
  issn         = {1424-859X},
  language     = {eng},
  number       = {1-4},
  pages        = {20--32},
  publisher    = {Karger},
  series       = {Cytogenetic and Genome Research2002-01-01+01:00},
  title        = {Mitogenomic analyses of eutherian relationships},
  url          = {http://dx.doi.org/10.1159/000063023},
  volume       = {96},
  year         = {2002},
}