Project 84: R. V. Hill, J. A. McCartney, E. Roberts, M. Bouare, F. Sissoko, M. A. O'Leary. 2008. Dyrosaurid (Crocodyliformes: Mesoeucrocodylia) fossils from the Upper Cretaceous and Paleogene of Mali: implications for phylogeny and survivorship across the K/T boundary. American Museum Novitates. 3631:1-19.
Specimen: † Rhabdognathus keiniensis (unvouchered)

Abstract

We describe new dyrosaurid fossils from three localities in Mali, representing strata of
Maastrichtian, Paleocene, and Eocene ages. The fossils significantly extend the temporal and
geographic ranges of several known dyrosaurid taxa. Rhabdognathus keiniensis and Chenanisuchus lateroculi are identified for the first time from Maastrichtian sediments. Additional material is referred to Phosphatosaurus gavialoides and, tentatively, the genus Sokotosuchus. These discoveries represent the first occurrence of Chenanisuchus and possibly of Sokotosuchus from Mali. Previously unknown morphological character states are incorporated into existing data matrices, reducing the amount of missing data. Phylogenetic analyses largely corroborate prior hypotheses of dyrosaurid relationships, but indicate a need for new characters to resolve the relationships of certain genera and species. The occurrence of both basal (e.g., Chenanisuchus lateroculi) and highly nested (e.g., Rhabdognathus keiniensis) members of Dyrosauridae on both sides of the K/T boundary indicates that dyrosaurid diversification was well underway by the latest Cretaceous, and that most, if not all dyrosaurid species survived the extinction event. The geology of the Mali’s Tilemsi Valley is clarified; some rocks previously assigned to the Iullemmeden Basin actually represent extensions of other basins: the Taoudeni Basin and Gao Trench.


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Project DOI: 10.7934/P84, http://dx.doi.org/10.7934/P84
This project containsMatrices
  • 14 Media
  • 1 Matrix
  • 2 Documents
  • 19 Taxa
  • 7 Specimens
  • 39 Characters
Total size of project's media files: 192 MB

Download Project SDD File
Total scored cells: 434
Total media associated with cells: 44
Total labels associated with cell media: 0
Characters
Total characters: 39
Total characters with associated media: 0
Total characters with media with labels: 0
Total character states: 85
Total character states with associated media: 0
Total character states with media with labels:0
Total unordered/ordered characters:39/0
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MorphoBank Project 84

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    member name taxa specimens media media
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    (scored, NPA, "-")
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    Robert Hill
    Project Administrator
    Last logged in 10/16/09
    19380393800434
    (413, 0, 21)
    04400
    Seth Kaufman
    Full membership
    Last logged in 12/11/07
    000000000
    (0, 0, 0)
    0000
    Jacob McCartney
    Full membership
    Last logged in 11/10/07
    046500000
    (0, 0, 0)
    0000
    Maureen O'Leary
    Full membership
    Last logged in 02/12/11
    000000000
    (0, 0, 0)
    0000


    Taxonomic Overview for Matrix 'M711' (14 Taxa)

    taxon unscored
    cells
    scored
    cells
    no cell
    support
    NPA
    cells
    "-" cellscell images labels on
    cell images
    member
    access
    [1] † Eutretauranosuchus
    Last Modified in 12/05/13
    8272704004
    [2] † Elosuchus
    Last Modified in 12/05/13
    7303002004
    [3] † Sarcosuchus
    Last Modified in 12/05/13
    2333304004
    [4] † Terminonaris
    Last Modified in 12/05/13
    3333303004
    [5] † Arambourgisuchus
    Last Modified in 12/05/13
    5333301004
    [6] † Hyposaurus
    Last Modified in 12/05/13
    2373000904
    [7] † Rhabdognathus aslerensis
    Last Modified in 12/05/13
    12265012504
    [8] † Rhabdognathus keiniensis
    Last Modified in 12/05/13
    13262400304
    [9] † Dyrosaurus phosphaticus
    Last Modified in 12/05/13
    3363600004
    [10] † Dyrosaurus maghribensis
    Last Modified in 12/05/13
    0363603004
    [11] † Chenanisuchus lateroculi
    Last Modified in 12/05/13
    8302901104
    [12] † Sokotosuchus
    Last Modified in 12/05/13
    15232001304
    [13] † Phosphatosaurus
    Last Modified in 12/05/13
    14242101304
    [14] † Congosaurus
    Last Modified in 12/05/13
    20191900004


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    Media views9981M27913 (478 views); Media search (3232 views); M27908 (484 views); M27909 (456 views); M27904 (496 views); M27912 (513 views); M27910 (474 views); M10554 (477 views); M10558 (449 views); M10556 (535 views); M10553 (501 views); M10555 (471 views); M27911 (493 views); M27906 (443 views); M10898 (479 views);
    Matrix views1442Matrix landing page (1248 views); Hill et al. (2008) (194 views);
    Specimen list5749
    Documents list880
    Taxon list6660
    Bibliography754




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