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.
Abstract
We describe new dyrosaurid fossils from three localities in Mali, representing strata ofMaastrichtian, 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 contains | Matrices |
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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 |
Currently Viewing:
MorphoBank Project 84
MorphoBank Project 84
- Creation Date:
01 June 2006 - Publication Date:
01 January 2007 - Project views: 52044
- Media downloads: 25
- Matrix downloads: 17
This research
supported by
Authors' Institutions
- University of the Witwatersrand
- American Museum of Natural History
- New York Institute of Technology
- Stony Brook University
Members
member name | taxa | specimens | media | media notes | chars | character
| cell scorings (scored, NPA, "-") | cell
| rules | ||||||||||
Robert Hill Project Administrator | 19 | 3 | 8 | 0 | 39 | 38 | 0 | 0 | 434 (413, 0, 21) | 0 | 44 | 0 | 0 | ||||||
Seth Kaufman | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 (0, 0, 0) | 0 | 0 | 0 | 0 | ||||||
Jacob McCartney Full membership | 0 | 4 | 6 | 5 | 0 | 0 | 0 | 0 | 0 (0, 0, 0) | 0 | 0 | 0 | 0 | ||||||
Maureen O'Leary Full membership | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 (0, 0, 0) | 0 | 0 | 0 | 0 |
Taxonomic Overview for Matrix 'M711' (14 Taxa)
taxon | unscored cells |
scored cells |
no cell support |
NPA cells |
"-" cells | cell images | labels on cell images |
member access |
[1] † Eutretauranosuchus Last Modified in 12/05/13 | 8 | 27 | 27 | 0 | 4 | 0 | 0 | 4 |
[2] † Elosuchus Last Modified in 12/05/13 | 7 | 30 | 30 | 0 | 2 | 0 | 0 | 4 |
[3] † Sarcosuchus Last Modified in 12/05/13 | 2 | 33 | 33 | 0 | 4 | 0 | 0 | 4 |
[4] † Terminonaris Last Modified in 12/05/13 | 3 | 33 | 33 | 0 | 3 | 0 | 0 | 4 |
[5] † Arambourgisuchus Last Modified in 12/05/13 | 5 | 33 | 33 | 0 | 1 | 0 | 0 | 4 |
[6] † Hyposaurus Last Modified in 12/05/13 | 2 | 37 | 30 | 0 | 0 | 9 | 0 | 4 |
[7] † Rhabdognathus aslerensis Last Modified in 12/05/13 | 12 | 26 | 5 | 0 | 1 | 25 | 0 | 4 |
[8] † Rhabdognathus keiniensis Last Modified in 12/05/13 | 13 | 26 | 24 | 0 | 0 | 3 | 0 | 4 |
[9] † Dyrosaurus phosphaticus Last Modified in 12/05/13 | 3 | 36 | 36 | 0 | 0 | 0 | 0 | 4 |
[10] † Dyrosaurus maghribensis Last Modified in 12/05/13 | 0 | 36 | 36 | 0 | 3 | 0 | 0 | 4 |
[11] † Chenanisuchus lateroculi Last Modified in 12/05/13 | 8 | 30 | 29 | 0 | 1 | 1 | 0 | 4 |
[12] † Sokotosuchus Last Modified in 12/05/13 | 15 | 23 | 20 | 0 | 1 | 3 | 0 | 4 |
[13] † Phosphatosaurus Last Modified in 12/05/13 | 14 | 24 | 21 | 0 | 1 | 3 | 0 | 4 |
[14] † Congosaurus Last Modified in 12/05/13 | 20 | 19 | 19 | 0 | 0 | 0 | 0 | 4 |
Project views
type | number of views | Individual items viewed (where applicable) |
Total project views | 52044 | |
Project overview | 3954 | |
Media views | 19228 | M27913 (946 views); Media search (6022 views); M27908 (937 views); M27909 (888 views); M27904 (951 views); M27912 (1008 views); M27910 (947 views); M10554 (950 views); M10558 (910 views); M10556 (984 views); M10553 (964 views); M10555 (941 views); M27911 (963 views); M27906 (894 views); M10898 (923 views); |
Matrix views | 2518 | Matrix landing page (2181 views); Hill et al. (2008) (337 views); |
Specimen list | 10666 | |
Documents list | 1660 | |
Taxon list | 12671 | |
Bibliography | 1347 |
Project downloads
type | number of downloads | Individual items downloaded (where applicable) |
Total downloads from project | 404 | |
Media downloads | 25 | M10558 (2 downloads); M10556 (2 downloads); M27913 (5 downloads); M10554 (2 downloads); M27909 (2 downloads); M27908 (4 downloads); M10553 (1 download); M27906 (1 download); M27904 (1 download); M27912 (3 downloads); M27910 (1 download); M27911 (1 download); |
Matrix downloads | 17 | Hill et al. (2008) (17 downloads); |
Project downloads | 362 |