Project 4839: T. R. Lyson, W. G. Joyce. 2009. A new species ofPalatobaena(Testudines: Baenidae) and a maximum parsimony and Bayesian phylogenetic analysis of Baenidae. Journal of Paleontology. 83 (3):457-470.
Abstract
New Palatobaena material from the Hell Creek Formation (Maastrichtian), including the first skull and shell association, from southwestern North Dakota represents a new species named herein Palatobaena cohen. The materialconsists of 4 skulls, 2 lower jaws, and 2 shells and represents a true biological population (spatially and temporally restricted), which provides unprecedented access to ontogenetic and other intraspecific variation found in this taxon. Theskull’s round shape and lack of a lingual ridge on the greatly expanded triturating surface indicate its Palatobaena affinities, but it differs from both previously existing Palatobaena taxa in a number of features. The addition of shell characters to the most inclusive baenid phylogenetic analyses (Maximum parsimony and Bayesian) to date indicate tha tPa. cohen is sister taxon to the other Palatobaena taxa. Notably, both the maximum parsimony analysis and Bayesiananalysis provide strong support for Plesiobaena antiqua as sister to the Palatobaena clade. In addition, both analyses provide strong support for Stygiochelys estesi as sister to the Eocene clade of Baena arenosa and Chisternon undatum,which significantly reduces this clades’ ghost lineage. The baenid topology reveals a demonstrably homoplastic trend towards the reduction of the temporal emargination and unique thickening of the posterior portion of the parietals that corresponds with the K/T boundary and is hypothesized to have provided limited protection from increasingly effective mammalian predators.Read the article »
Article DOI: 10.1666/08-172.1
Project DOI: 10.7934/P4839, http://dx.doi.org/10.7934/P4839
This project contains | Matrices |
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Download Project SDD File | Total scored cells: 647 Total media associated with cells: 0 Total labels associated with cell media: 0 |
Characters | |
Total characters: 54 Total characters with associated media: 0 Total characters with media with labels: 0 Total character states: 118 Total character states with associated media: 0 Total character states with media with labels:0 Total unordered/ordered characters:54/0 |
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MorphoBank Project 4839
MorphoBank Project 4839
- Creation Date:
17 August 2023 - Publication Date:
04 September 2023 - Project views: 2809
This research
supported by
Authors' Institutions
- Universitaet Tuebingen (Eberhard-Karls-Universitaet)
- Yale University
- Marmarth Research Foundation
Members
member name | taxa | specimens | media | chars | character
| cell scorings (scored, NPA, "-") | cell
| rules | ||||||
Shreya Jariwala Project Administrator | 16 | 5 | 5 | 54 | 0 | 0 | 647 (647, 0, 0) | 0 | 0 | 0 |
Taxonomic Overview for Matrix 'M29452' (16 Taxa)
taxon | unscored cells |
scored cells |
no cell support |
NPA cells |
"-" cells | cell images | labels on cell images |
member access |
[1] † Pleurosternon bullockii Last Modified in 08/17/23 | 6 | 48 | 48 | 0 | 0 | 0 | 0 | 1 |
[2] † Glyptops plicatulus Last Modified in 08/17/23 | 5 | 49 | 49 | 0 | 0 | 0 | 0 | 1 |
[3] † Trinitichelys hiatti Last Modified in 08/17/23 | 10 | 44 | 44 | 0 | 0 | 0 | 0 | 1 |
[4] † Neurankylus eximius Last Modified in 08/17/23 | 23 | 31 | 31 | 0 | 0 | 0 | 0 | 1 |
[5] † Hayemys latifrons Last Modified in 08/17/23 | 30 | 24 | 24 | 0 | 0 | 0 | 0 | 1 |
[6] † Plesiobaena antiqua Last Modified in 08/17/23 | 0 | 54 | 54 | 0 | 0 | 0 | 0 | 1 |
[7] † Boremys pulchra Last Modified in 08/17/23 | 5 | 50 | 49 | 0 | 0 | 0 | 0 | 1 |
[8] † Boremys grandis Last Modified in 08/17/23 | 35 | 19 | 19 | 0 | 0 | 0 | 0 | 1 |
[9] † Eubaena cephalica Last Modified in 08/17/23 | 22 | 32 | 32 | 0 | 0 | 0 | 0 | 1 |
[10] † Palatobaena cohen Last Modified in 08/17/23 | 2 | 52 | 52 | 0 | 0 | 0 | 0 | 1 |
[11] † Palatobaena bairdi Last Modified in 08/17/23 | 19 | 35 | 35 | 0 | 0 | 0 | 0 | 1 |
[12] † Palatobaena gaffneyi Last Modified in 08/17/23 | 22 | 32 | 32 | 0 | 0 | 0 | 0 | 1 |
[13] † Stygiochelys estesi Last Modified in 08/17/23 | 14 | 40 | 40 | 0 | 0 | 0 | 0 | 1 |
[14] † Baena arenosa Last Modified in 08/17/23 | 1 | 53 | 53 | 0 | 0 | 0 | 0 | 1 |
[15] † Chisternon undatum Last Modified in 08/17/23 | 0 | 54 | 54 | 0 | 0 | 0 | 0 | 1 |
[16] † Goleremys mckennai Last Modified in 08/17/23 | 24 | 30 | 30 | 0 | 0 | 0 | 0 | 1 |
Project views
type | number of views | Individual items viewed (where applicable) |
Total project views | 2809 | |
Project overview | 155 | |
Media views | 763 | Media search (395 views); M892505 (74 views); M892506 (78 views); M892507 (72 views); M892508 (72 views); M892509 (72 views); |
Bibliography | 93 | |
Taxon list | 745 | |
Matrix views | 118 | Matrix landing page (112 views); Lyson and Joyce 2009 (6 views); |
Documents list | 103 | |
Views for media list | 143 | |
Specimen list | 689 |