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Evidence for a single loss of mineralized teeth in the common avian ancestor.

Publication ,  Journal Article
Meredith, RW; Zhang, G; Gilbert, MTP; Jarvis, ED; Springer, MS
Published in: Science
December 12, 2014

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.

Duke Scholars

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Published In

Science

DOI

EISSN

1095-9203

Publication Date

December 12, 2014

Volume

346

Issue

6215

Start / End Page

1254390

Location

United States

Related Subject Headings

  • Vertebrates
  • Tooth
  • Phylogeny
  • Mutation
  • Mammals
  • Genomics
  • Genome
  • General Science & Technology
  • Fossils
  • Evolution, Molecular
 

Citation

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Meredith, R. W., Zhang, G., Gilbert, M. T. P., Jarvis, E. D., & Springer, M. S. (2014). Evidence for a single loss of mineralized teeth in the common avian ancestor. Science, 346(6215), 1254390. https://doi.org/10.1126/science.1254390
Meredith, Robert W., Guojie Zhang, M Thomas P. Gilbert, Erich D. Jarvis, and Mark S. Springer. “Evidence for a single loss of mineralized teeth in the common avian ancestor.Science 346, no. 6215 (December 12, 2014): 1254390. https://doi.org/10.1126/science.1254390.
Meredith RW, Zhang G, Gilbert MTP, Jarvis ED, Springer MS. Evidence for a single loss of mineralized teeth in the common avian ancestor. Science. 2014 Dec 12;346(6215):1254390.
Meredith, Robert W., et al. “Evidence for a single loss of mineralized teeth in the common avian ancestor.Science, vol. 346, no. 6215, Dec. 2014, p. 1254390. Pubmed, doi:10.1126/science.1254390.
Meredith RW, Zhang G, Gilbert MTP, Jarvis ED, Springer MS. Evidence for a single loss of mineralized teeth in the common avian ancestor. Science. 2014 Dec 12;346(6215):1254390.
Journal cover image

Published In

Science

DOI

EISSN

1095-9203

Publication Date

December 12, 2014

Volume

346

Issue

6215

Start / End Page

1254390

Location

United States

Related Subject Headings

  • Vertebrates
  • Tooth
  • Phylogeny
  • Mutation
  • Mammals
  • Genomics
  • Genome
  • General Science & Technology
  • Fossils
  • Evolution, Molecular