Project 2121: K. Padian, S. Werning, J. R. Horner. 2015. A hypothesis of differential secondary bone formation in dinosaurs. Comptes Rendus Palevol.
Specimen: † Hypacrosaurus stebingeri (MOR:549)

Abstract

We propose the hypothesis that in the long bones of large, rapidly growing animals, secondary osteons may form to a greater degree in smaller bones than in larger ones for reasons that may have more to do with the interplay between element-specific growth rates and whole-body metabolic rates than with mechanical or environmental factors. We predict that in many large animals with rapid growth trajectories and some disparity in size in the long bones and other skeletal elements, the largest bones will show less secondary remodeling than smaller ones. The reason is that, whereas the largest bones are increasing their dimensions too rapidly to accommodate much secondary reworking (until they approach full size), the smaller bones that are not increasing in size as rapidly must still process the flow of metabolites through their elements, and this is manifested in secondary remodeling. This hypothesis does not contradict or undermine other explanations, but rather adds an additional one that focuses more on growth and metabolic rates with respect to bones of different size in the same skeleton. Because the timing of onset of remodeling and the pace of its progression both vary by element, caution must be taken when using secondary remodeling to infer the overall ontogenetic stage of the animal.


Read the article »

Article DOI: doi:10.1016/j.crpv.2015.03.002

Project DOI: 10.7934/P2121, http://dx.doi.org/10.7934/P2121
This project contains
  • 14 Media
  • 1 Taxon
  • 1 Specimen
Total size of project's media files: 41.07M

Download Project SDD File
Currently Viewing:
MorphoBank Project 2121

    This research
    supported by

    Authors' Institutions

    • University of California Berkeley

    • Museum of the Rockies

    • Stony Brook University



    Members

    member name taxa specimens media media
    notes
    Sarah Werning
    Project Administrator
    Last logged in 06/14/15
    111414
    Jack Horner
    Full membership
    Last logged in Never
    0000
    Kevin Padian
    Full membership
    Last logged in 02/19/15
    0000


    Project has no matrices defined.



    Project views

    type number of views Individual items viewed (where applicable)
    Total project views16165
    Project overview2721
    Media views9748Media search (3380 views); M374261 (433 views); M374271 (472 views); M374274 (443 views); M374267 (466 views); M374263 (499 views); M374268 (458 views); M374264 (475 views); M374272 (468 views); M374262 (465 views); M374266 (458 views); M374269 (455 views); M374273 (430 views); M374265 (431 views); M374270 (415 views);
    Specimen list1654
    Taxon list1394
    Bibliography648




    Project downloads

    type number of downloads Individual items downloaded (where applicable)
    Total downloads from project251
    Media downloads1M374267 (1 download);
    Project downloads250