Evidence for a single loss of mineralized teeth in the common avian ancestor.
Identifieur interne : 000796 ( Main/Exploration ); précédent : 000795; suivant : 000797Evidence for a single loss of mineralized teeth in the common avian ancestor.
Auteurs : Robert W. Meredith [États-Unis] ; Guojie Zhang [Danemark] ; M Thomas P. Gilbert [Australie] ; Erich D. Jarvis [États-Unis] ; Mark S. Springer [États-Unis]Source :
- Science (New York, N.Y.) [ 1095-9203 ] ; 2014.
Descripteurs français
- KwdFr :
- MESH :
- anatomie et histologie : Oiseaux.
- génétique : Alligators et crocodiles, Mammifères, Oiseaux, Vertébrés.
- Animaux, Dent, Dentine, Fossiles, Génome, Génomique, Mutation, Oiseaux, Phylogénie, Émail dentaire, Évolution biologique, Évolution moléculaire.
English descriptors
- KwdEn :
- MESH :
- anatomy & histology : Birds.
- classification : Birds.
- genetics : Alligators and Crocodiles, Birds, Mammals, Vertebrates.
- Animals, Biological Evolution, Dental Enamel, Dentin, Evolution, Molecular, Fossils, Genome, Genomics, Mutation, Phylogeny, Tooth.
Abstract
Edentulism, the absence of teeth, has evolved convergently among vertebrates, including birds, turtles, and several lineages of mammals. Instead of teeth, modern birds (Neornithes) use a horny beak (rhamphotheca) and a muscular gizzard to acquire and process food. We performed comparative genomic analyses representing lineages of nearly all extant bird orders and recovered shared, inactivating mutations within genes expressed in both the enamel and dentin of teeth of other vertebrate species, indicating that the common ancestor of modern birds lacked mineralized teeth. We estimate that tooth loss, or at least the loss of enamel caps that provide the outer layer of mineralized teeth, occurred about 116 million years ago.
DOI: 10.1126/science.1254390
PubMed: 25504730
Affiliations:
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Le document en format XML
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Meredith</name><affiliation wicri:level="2"><nlm:affiliation>Department of Biology and Molecular Biology, Montclair State University, Montclair, NJ 07043, USA. meredithr@mail.montclair.edu mark.springer@ucr.edu.</nlm:affiliation><country xml:lang="fr">États-Unis</country><wicri:regionArea>Department of Biology and Molecular Biology, Montclair State University, Montclair, NJ 07043</wicri:regionArea><placeName><region type="state">New Jersey</region></placeName></affiliation></author><author><name sortKey="Zhang, Guojie" sort="Zhang, Guojie" uniqKey="Zhang G" first="Guojie" last="Zhang">Guojie Zhang</name><affiliation wicri:level="1"><nlm:affiliation>China National GeneBank, Beijing Genomics Institute-Shenzhen, Shenzhen, 518083, China. 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Meredith</name><affiliation wicri:level="2"><nlm:affiliation>Department of Biology and Molecular Biology, Montclair State University, Montclair, NJ 07043, USA. meredithr@mail.montclair.edu mark.springer@ucr.edu.</nlm:affiliation><country xml:lang="fr">États-Unis</country><wicri:regionArea>Department of Biology and Molecular Biology, Montclair State University, Montclair, NJ 07043</wicri:regionArea><placeName><region type="state">New Jersey</region></placeName></affiliation></author><author><name sortKey="Zhang, Guojie" sort="Zhang, Guojie" uniqKey="Zhang G" first="Guojie" last="Zhang">Guojie Zhang</name><affiliation wicri:level="1"><nlm:affiliation>China National GeneBank, Beijing Genomics Institute-Shenzhen, Shenzhen, 518083, China. Centre for Social Evolution, Department of Biology, Universitetsparken 15, University of Copenhagen, DK-2100 Copenhagen, Denmark.</nlm:affiliation><country xml:lang="fr">Danemark</country><wicri:regionArea>China National GeneBank, Beijing Genomics Institute-Shenzhen, Shenzhen, 518083, China. Centre for Social Evolution, Department of Biology, Universitetsparken 15, University of Copenhagen, DK-2100 Copenhagen</wicri:regionArea><wicri:noRegion>DK-2100 Copenhagen</wicri:noRegion></affiliation></author><author><name sortKey="Gilbert, M Thomas P" sort="Gilbert, M Thomas P" uniqKey="Gilbert M" first="M Thomas P" last="Gilbert">M Thomas P. Gilbert</name><affiliation wicri:level="1"><nlm:affiliation>Center for GeoGenetics, Natural History Museum of Denmark, University of Copenhagen Øster Voldgade 5-7, 1350 Copenhagen, Denmark. Trace and Environmental DNA Laboratory, Department of Environment and Agriculture, Curtin University, Perth, Western Australia 6102, Australia.</nlm:affiliation><country xml:lang="fr">Australie</country><wicri:regionArea>Center for GeoGenetics, Natural History Museum of Denmark, University of Copenhagen Øster Voldgade 5-7, 1350 Copenhagen, Denmark. Trace and Environmental DNA Laboratory, Department of Environment and Agriculture, Curtin University, Perth, Western Australia 6102</wicri:regionArea><wicri:noRegion>Western Australia 6102</wicri:noRegion></affiliation></author><author><name sortKey="Jarvis, Erich D" sort="Jarvis, Erich D" uniqKey="Jarvis E" first="Erich D" last="Jarvis">Erich D. 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Instead of teeth, modern birds (Neornithes) use a horny beak (rhamphotheca) and a muscular gizzard to acquire and process food. We performed comparative genomic analyses representing lineages of nearly all extant bird orders and recovered shared, inactivating mutations within genes expressed in both the enamel and dentin of teeth of other vertebrate species, indicating that the common ancestor of modern birds lacked mineralized teeth. We estimate that tooth loss, or at least the loss of enamel caps that provide the outer layer of mineralized teeth, occurred about 116 million years ago.</div></front></TEI><affiliations><list><country><li>Australie</li><li>Danemark</li><li>États-Unis</li></country><region><li>Californie</li><li>Caroline du Nord</li><li>New Jersey</li></region></list><tree><country name="États-Unis"><region name="New Jersey"><name sortKey="Meredith, Robert W" sort="Meredith, Robert W" uniqKey="Meredith R" first="Robert W" last="Meredith">Robert W. Meredith</name></region><name sortKey="Jarvis, Erich D" sort="Jarvis, Erich D" uniqKey="Jarvis E" first="Erich D" last="Jarvis">Erich D. Jarvis</name><name sortKey="Springer, Mark S" sort="Springer, Mark S" uniqKey="Springer M" first="Mark S" last="Springer">Mark S. Springer</name></country><country name="Danemark"><noRegion><name sortKey="Zhang, Guojie" sort="Zhang, Guojie" uniqKey="Zhang G" first="Guojie" last="Zhang">Guojie Zhang</name></noRegion></country><country name="Australie"><noRegion><name sortKey="Gilbert, M Thomas P" sort="Gilbert, M Thomas P" uniqKey="Gilbert M" first="M Thomas P" last="Gilbert">M Thomas P. Gilbert</name></noRegion></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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