Project 436: P. M. O'Connor, J. J. W. Sertich, N. J. Stevens, E. M. Roberts, M. D. Gottfried, T. L. Hieronymus, Z. A. Jinnah, R. Ridgely, S. E. Ngasala, J. Temba. 2010. The evolution of mammal-like crocodyliforms in the Cretaceous Period of Gondwana. Nature. 466 (7307):748–751.
Specimen: † Pakasuchus kapalimai (RRBP:08631)
View: lateral

Abstract

Fossil crocodyliforms discovered in recent years have revealed a level of morphological and ecological diversity not exhibited by extant members of the group. This diversity is particularly notable among taxa of the Cretaceous Period (144–65 million years ago) recovered from former Gondwanan landmasses. Here we report the discovery of a new species of Cretaceous notosuchian crocodyliform from the Rukwa Rift Basin of southwestern Tanzania. This small-bodied form deviates significantly from more typical crocodyliform craniodental morphologies, having a short, broad skull, robust lower jaw, and a dentition with relatively few teeth that nonetheless show marked heterodonty. The presence of morphologically complex, complementary upper and lower molariform teeth suggests a degree of crown–crown contact during jaw adduction that is unmatched among known crocodyliforms, paralleling the level of occlusal complexity seen in mammals and their extinct relatives. The presence of another small-bodied mammal-like crocodyliform in the Cretaceous of Gondwana indicates that notosuchians probably filled niches and inhabited ecomorphospace that were otherwise occupied by mammals on northern continents.


Read the article »

Project DOI: 10.7934/P436, http://dx.doi.org/10.7934/P436
This project contains
  • 1 Media
  • 3 Documents
  • 1 Taxon
  • 1 Specimen
Total size of project's media files: 1 MB

Download Project SDD File
Currently Viewing:
MorphoBank Project 436

    This research
    supported by



    Members

    member name taxa specimens media
    MorphoBank Curator
    Project Administrator
    Last logged in 08/06/14
    111
    Maureen Admin
    Full membership
    Last logged in 02/04/14
    000
    Patrick O'Connor
    Full membership
    Last logged in 09/04/13
    000


    Project has no matrices defined.



    Project views

    type number of views Individual items viewed (where applicable)
    Total project views14514
    Project overview3057
    Media views4350Media search (3745 views); M325483 (605 views);
    Specimen list2019
    Taxon list1642
    Bibliography736
    Documents list1639
    Views for media list1071




    Project downloads

    type number of downloads Individual items downloaded (where applicable)
    Total downloads from project221
    Document downloads5Matrix (3 downloads); Character List (1 download); Copyright Permission (1 download);
    Project downloads214
    Media downloads2M325483 (2 downloads);