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Cited by 123Evolution and Paleontology StudiesPaleontology and Evolutionary BiologyPlant Diversity and Evolution

The DOI matches its Crossref record; 60 of the 66 references it cites were found in a registry or an index.

The oldest platypus and its bearing on divergence timing of the platypus and echidna clades

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Rowe, Timothy, Rich, Thomas H., Vickers-Rich, Patricia, Springer, Mark, Woodburne, Michael O.·2008·Proceedings of the National Academy of Sciences
DOI 10.1073/pnas.0706385105PMC PMC2234122
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Abstract

Monotremes have left a poor fossil record, and paleontology has been virtually mute during two decades of discussion about molecular clock estimates of the timing of divergence between the platypus and echidna clades. We describe evidence from high-resolution x-ray computed tomography indicating that Teinolophos , an Early Cretaceous fossil from Australia's Flat Rocks locality (121–112.5 Ma), lies within the crown clade Monotremata, as a basal platypus. Strict molecular clock estimates of the divergence between platypus and echidnas range from 17 to 80 Ma, but Teinolophos suggests that the two monotreme clades were already distinct in the Early Cretaceous, and that their divergence may predate even the oldest strict molecular estimates by at least 50%. We generated relaxed molecular clock models using three different data sets, but only one yielded a date overlapping with the age of Teinolophos . Morphology suggests that Teinolophos is a platypus in both phylogenetic and ecological aspects, and tends to contradict the popular view of rapid Cenozoic monotreme diversification. Whereas the monotreme fossil record is still sparse and open to interpretation, the new data are consistent with much slower ecological, morphological, and taxonomic diversification rates for monotremes than in their sister taxon, the therian mammals. This alternative view of a deep geological history for monotremes suggests that rate heterogeneities may have affected mammalian evolution in such a way as to defeat strict molecular clock models and to challenge even relaxed molecular clock models when applied to mammalian history at a deep temporal scale.

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Citations

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Show all 66 references

Research works printed but not linked: 24

  1. WA Clemens, BJ Richardson, PR Baverstock Faunas of Australia: Biogeography and Phylogeny of the Metatheria, eds DW Walton, BJ Richardson (Austr Gov Publ Serv, Canberra), pp. 527–548 (1989).
  2. M Westerman, D Edwards Platypus and Echidna, ed ML Augee (Roy Zool Soc New South Wales, Sydney), pp. 28–34 (1992).
  3. R Pascual, M Archer, EO Jaureguizar, JL Prado, H Godthelp, SJ Hand Platypus and Echidna, ed ML Augee (Roy Zool Soc New South Wales, Sydney), pp. 1–14 (1992).
  4. T Rowe, J Kappelman, WD Carlson, RA Ketcham, C Denison Geotimes 42, 23–27 (1997).
  5. WK Gregory Bull Amer Mus Nat Hist 88, 1–52 (1947).
  6. GW Rougier, JR Wible, JA Hopson Am Mus Novitates 3138, 1–38 (1996).
  7. MJ Rowe, RC Bohringer Platypus and Echidna, ed ML Augee (Roy Zool Soc New South Wales, Sydney), pp. 177–193 (1992).
  8. H Burrell The Platypus (Angus & Robertson, Sydney, 1927).
  9. MO Woodburne, RH Tedford, A Archer, WD Turnbull, MD Plane, EL Lundelius Spec Pub S Austral Dept Mines Energy 5, 347–363 (1985).
  10. MO Woodburne, RH Tedford Am Mus Novitates 2588, 1–11 (1975).
  11. JA Hopson, AW Crompton Evol Biol 3, 15–72 (1969).
  12. KA Kermack, Z Kielan-Jaworowska Zool J Linn Soc 50, 103–115 (1971).
  13. TH Rich, P Vickers-Rich, P Trusler, TF Flannery, R Cifelli, A Constantine, L Kool, N van Klaveren Acta Palaeont Polon 46, 113–118 (2001).
  14. Z-X Luo, RL Cifelli, Z Kielan-Jaworowska Acta Palaeont Polon 47, 1–78 (2002).
  15. TH Rich, P Vickers-Rich, A Constantine, TF Flannery, L Kool, N van Klaveren Rec Queen Victoria Mus 106, 1–29 (1999).
  16. WK Gregory Bull Amer Mus Nat Hist 27, 1–524 (1910).
  17. U Zeller U Abh Senckenberg Naturforsch Gesell 545, 1–188 (1989).
  18. RC Bohringer Platypus and Echidna, ed ML Augee (Roy Zool Soc New South Wales, Sydney), pp. 194–203 (1992).
  19. U Proske, JE Gregory, A Iggo Platypus and Echidna, ed ML Augee (Roy Zool Soc New South Wales, Sydney), pp. 204–210 (1992).
  20. NG Taylor, PR Manger, JD Pettigrew, LS Hall Platypus and Echidna, ed ML Augee (Roy Zool Soc New South Wales, Sydney), pp. 216–224 (1992).
  21. ML Augee, BA Gooden Platypus and Echidna, ed ML Augee (Roy Zool Soc New South Wales, Sydney), pp. 211–215 (1992).
  22. R Pascual, M Archer, EO Jaureguizar Platypus and Echidna, ed ML Augee (Roy Zool Soc New South Wales, Sydney), pp. 1–14 (1992).
  23. T Rowe New Perspectives on the History of Life, eds M Ghiselin, G Pinna (California Acad Sci, San Francisco), pp. 71–96, Memoir 20. (1996).
  24. C Bech, S Nicol, NA Andersen Platypus and Echidna, ed ML Augee (Roy Zool Soc New South Wales, Sydney), pp. 134–139 (1992).

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Metadata

Authors
Rowe, T., Rich, T. H., Vickers-Rich, P., Springer, M., & Woodburne, M. O.
Affiliations
  • The University of Texas at Austin (US)
  • Museums Victoria (AU)
  • Monash University (AU)
  • University of California, Riverside (US)
  • Museum Of Northern Arizona (US)
ORCID
Venue
Proceedings of the National Academy of Sciences
Publisher
National Academy of Sciences
Published
2008-01-29
Volume
105
Issue
4
Pages
1238-1242
ISSN
  • 0027-8424 (ISSN-L)
  • 1091-6490
DOI
10.1073/pnas.0706385105
PMC
PMC2234122
OpenAlex
W2103506571
Cited by
123
References
66
Citations by year
2026: 2 · 2025: 2 · 2024: 1 · 2023: 3 · 2022: 3 · 2021: 4 · 2020: 9 · 2019: 6 · 2018: 4 · 2017: 7 · 2016: 16 · 2015: 4 · 2014: 9 · 2013: 10 · 2012: 10
FWCI
8.37
Type
journal article
Language
en
Open access
Locations
  • Proceedings of the National Academy of Sciences (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Science Foundation (0208675, 0531767)
  • University of Texas at Austin
Topics
  • Physical Sciences › Earth and Planetary Sciences › Paleontology › Evolution and Paleontology Studies
  • Physical Sciences › Earth and Planetary Sciences › Paleontology › Paleontology and Evolutionary Biology
  • Life Sciences › Agricultural and Biological Sciences › Ecology, Evolution, Behavior and Systematics › Plant Diversity and Evolution
Keywords
platypus, echidna, monotremes, molecular clock, relaxed molecular clock, Lower Cretaceous, rate heterogeneity, computed tomography
MeSH terms
Animals, Australia, Tachyglossidae, Fossils, Phylogeny, Platypus, Time, Tomography, X-Ray Computed, Evolution, Molecular

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