Skip to main content

Thank you for visiting nature.com. You are using a browser version with limited support for CSS. To obtain the best experience, we recommend you use a more up to date browser (or turn off compatibility mode in Internet Explorer). In the meantime, to ensure continued support, we are displaying the site without styles and JavaScript.

Triassic sauropodomorph eggshell might not be soft

Matters Arising to this article was published on 19 October 2022

The Original Article was published on 17 June 2020

This is a preview of subscription content, access via your institution

Access options

Buy article

Get time limited or full article access on ReadCube.

$32.00

All prices are NET prices.

Fig. 1: Analytical data from modern and fossil eggshells.
Fig. 2: Likelihood based an ancestral character reconstruction for eggshell mechanical properties in Diapsida.

Data availability

No new data were generated in this study.

References

  1. Norell, M. A. et al. A theropod dinosaur embryo and the affinities of the Flaming Cliffs dinosaur eggs. Science 266, 779–782 (1994).

    Article  CAS  ADS  Google Scholar 

  2. Chiappe, L. M. et al. Sauropod dinosaur embryos from the Late Cretaceous of Patagonia. Nature 396, 258–261 (1998).

    Article  CAS  ADS  Google Scholar 

  3. Norell, M. A. et al. The first dinosaur egg was soft. Nature 583, 406–410 (2020).

    Article  CAS  ADS  Google Scholar 

  4. Moreno-Azanza, M., Mariani, E., Bauluz, B. & Canudo, J. I. Growth mechanisms in dinosaur eggshells: an insight from electron backscatter diffraction. J. Vertebr. Paleontol. 33, 121–130 (2013).

    Article  Google Scholar 

  5. Choi, S., Lee, S. K., Kim, N.-H., Kim, S. & Lee, Y.-N. Raman spectroscopy detects amorphous carbon in an enigmatic egg from the Upper Cretaceous Wido Volcanics of South Korea. Front. Earth Sci. 7, 349 (2020).

    Article  ADS  Google Scholar 

  6. Yang, T.-R., Chen, Y.-H., Wiemann, J., Spiering, B. & Sander, P. M. Fossil eggshell cuticle elucidates dinosaur nesting ecology. PeerJ 6, e5144 (2018).

    Article  Google Scholar 

  7. Moreno-Azanza, M., Bauluz, B., Canudo, J. I., Gasca, J. M. & Torcida Fernández-Baldor, F. Combined use of electron and light microscopy techniques reveals false secondary shell units in Megaloolithidae eggshells. PLoS ONE 11, e0153026 (2016).

    Article  Google Scholar 

  8. Wiemann, J. et al. Fossilization transforms vertebrate hard tissue proteins into N-heterocyclic polymers. Nat. Commun. 9, 4741 (2018).

    Article  ADS  Google Scholar 

  9. Sadezky, A., Muckenhuber, H., Grothe, H., Niessner, R. & Pöschl, U. Raman microspectroscopy of soot and related carbonaceous materials: spectral analysis and structural information. Carbon 43, 1731–1742 (2005).

    Article  CAS  Google Scholar 

  10. Ferrari, A. C. & Robertson, J. Interpretation of Raman spectra of disordered and amorphous carbon. Phys. Rev. B 61, 14095–14107 (2000).

    Article  CAS  ADS  Google Scholar 

  11. Henry, D. G., Jarvis, I., Gillmore, G. & Stephenson, M. Raman spectroscopy as a tool to determine the thermal maturity of organic matter: application to sedimentary, metamorphic and structural geology. Earth Sci. Rev. 198, 102936 (2019).

    Article  CAS  Google Scholar 

  12. Choi, S. et al. Fossil eggshells of amniotes as a paleothermometry tool. Palaeogeogr. Palaeoclimatol. Palaeoecol. 571, 110376 (2021).

    Article  Google Scholar 

  13. Pol, D. et al. Earliest evidence of herd-living and age segregation amongst dinosaurs. Sci. Rep. 11, 20023 (2021).

    Article  CAS  ADS  Google Scholar 

  14. Choi, S., Han, S., Kim, N.-H. & Lee, Y.-N. A comparative study of eggshells of Gekkota with morphological, chemical compositional and crystallographic approaches and its evolutionary implications. PLoS ONE 13, e0199496 (2018).

    Article  Google Scholar 

  15. Stein, K. et al. Structure and evolutionary implications of the earliest (Sinemurian, Early Jurassic) dinosaur eggs and eggshells. Sci. Rep. 9, 4424 (2019).

    Article  ADS  Google Scholar 

Download references

Acknowledgements

We thank J. Nan for discussion. S.C. was supported by a Basic Science Research Program through the National Research Foundation of Korea funded by the Ministry of Education (grant number 2020R1A6A3A03038316); T.-R.Y. was supported by research funding from the Ministry of Science and Technology, Taiwan (MOST 108-2116-M-178-003-MY2); M.M.-A. was supported by Fundação para a Ciência e a Tecnologia (PTDC/CTA-PAL/31656/2017 and SFRH/BPD/113130/2015) and the Spanish Ministry of Science and Innovation (project CGL2017-85038-P) and by the Government of Aragón-FEDER 2014–2020.

Author information

Authors and Affiliations

Authors

Contributions

All of the authors conceived, wrote and edited the manuscript.

Corresponding author

Correspondence to Seung Choi.

Ethics declarations

Competing interests

The authors declare no competing interests.

Additional information

Publisher’s note Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.

Supplementary information

Rights and permissions

Reprints and Permissions

About this article

Verify currency and authenticity via CrossMark

Cite this article

Choi, S., Yang, TR., Moreno-Azanza, M. et al. Triassic sauropodomorph eggshell might not be soft. Nature 610, E8–E10 (2022). https://doi.org/10.1038/s41586-022-05151-9

Download citation

  • Received:

  • Accepted:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1038/s41586-022-05151-9

This article is cited by

Comments

By submitting a comment you agree to abide by our Terms and Community Guidelines. If you find something abusive or that does not comply with our terms or guidelines please flag it as inappropriate.

Search

Quick links

Nature Briefing

Sign up for the Nature Briefing newsletter — what matters in science, free to your inbox daily.

Get the most important science stories of the day, free in your inbox. Sign up for Nature Briefing