Project 3838: M. R. Whitney, A. R. H. LeBlanc, A. R. Reynolds, K. S. Brink. 2020. Convergent dental adaptations in the serrations of the hypercarnivorous synapsids and dinosaurs. Biology Letters. 16:20200750.
Specimen: † Gorgonopsia (NHCC:LB248)
View: Longitudinal

Abstract


Theropod dinosaurs are well known for having a ziphodont dentition: serrated, blade-shaped teeth that they used for cutting through prey. Serrations along the carinae of theropod teeth are composed of true denti- cles, a complex arrangement of dentine, enamel, and interdental folds. This structure would have supported individual denticles and dissipated the stresses associated with feeding. These particular serrations were pre- viously thought to be unique to theropod dinosaurs and some other archosaurs. Here, we identify the same denticles and interdental folds form- ing the cutting edges in the teeth of a Permian gorgonopsian synapsid, extending the temporal and phylogenetic distribution of this dental mor- phology. This remarkable instance of convergence not only represents the earliest record of this adaptation to hypercarnivory but also demonstrates that the first iteration of this feature appeared in non-mammalian synapsids. Comparisons of tooth serrations in gorgonopsians with those of earlier synapsids and hypercarnivorous mammals reveal some gorgonopsians acquired a complex tissue arrangement that differed from other synapsids.


Read the article »

Article DOI: https://doi.org/10.1098/rsbl.2020.0750

Project DOI: 10.7934/P3838, http://dx.doi.org/10.7934/P3838
This project contains
  • 8 Media
  • 4 Taxa
  • 4 Specimens
Total size of project's media files: 151.14M

Download Project SDD File
Currently Viewing:
MorphoBank Project 3838
  • Creation Date:
    20 October 2020
  • Publication Date:
    12 January 2021
  • Project views: 3791

    This research
    supported by

    Authors' Institutions

    • Harvard University



    Members

    member name taxa specimens media
    Megan Whitney
    Project Administrator
    448


    Project has no matrices defined.



    Project views

    type number of views Individual items viewed (where applicable)
    Total project views3791
    Project overview268
    Media views1442Media search (602 views); M738858 (110 views); M738859 (105 views); M738860 (100 views); M738861 (110 views); M738862 (106 views); M738863 (101 views); M738864 (112 views); M738865 (96 views);
    Taxon list653
    Specimen list836
    Views for media list205
    Bibliography387




    Project downloads

    type number of downloads Individual items downloaded (where applicable)
    Total downloads from project84
    Project downloads84