Project 5213: S. D. Sampson, A. Stepanova, M. A. Loewen, A. A. Farke, E. M. Roberts, C. A. Forster, J. A. Smith, A. L. Titus. 2010. New Horned Dinosaurs from Utah Provide Evidence for Intracontinental Dinosaur Endemism. PLOS ONE. 5 (9):e12292.
Abstract
During much of the Late Cretaceous, a shallow, epeiric sea divided North America into eastern and western landmasses. The western landmass, known as Laramidia, although diminutive in size, witnessed a major evolutionary radiation of dinosaurs. Other than hadrosaurs (duck-billed dinosaurs), the most common dinosaurs were ceratopsids (large-bodied horned dinosaurs), currently known only from Laramidia and Asia. Remarkably, previous studies have postulated the occurrence of latitudinally arrayed dinosaur "provinces," or "biomes," on Laramidia. Yet this hypothesis has been challenged on multiple fronts and has remained poorly tested. Methodology/principal findings: Here we describe two new, co-occurring ceratopsids from the Upper Cretaceous Kaiparowits Formation of Utah that provide the strongest support to date for the dinosaur provincialism hypothesis. Both pertain to the clade of ceratopsids known as Chasmosaurinae, dramatically increasing representation of this group from the southern portion of the Western Interior Basin of North America. Utahceratops gettyi gen. et sp. nov.-characterized by short, rounded, laterally projecting supraorbital horncores and an elongate frill with a deep median embayment-is recovered as the sister taxon to Pentaceratops sternbergii from the late Campanian of New Mexico. Kosmoceratops richardsoni gen. et sp. nov.-characterized by elongate, laterally projecting supraorbital horncores and a short, broad frill adorned with ten well developed hooks-has the most ornate skull of any known dinosaur and is closely allied to Chasmosaurus irvinensis from the late Campanian of Alberta. Conclusions/significance: Considered in unison, the phylogenetic, stratigraphic, and biogeographic evidence documents distinct, co-occurring chasmosaurine taxa north and south on the diminutive landmass of Laramidia. The famous Triceratops and all other, more nested chasmosaurines are postulated as descendants of forms previously restricted to the southern portion of Laramidia. Results further suggest the presence of latitudinally arrayed evolutionary centers of endemism within chasmosaurine ceratopsids during the late Campanian, the first documented occurrence of intracontinental endemism within dinosaurs.Read the article »
Article DOI: 10.1371/journal.pone.0012292
Project DOI: 10.7934/P5213, http://dx.doi.org/10.7934/P5213
This project contains | Matrices |
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Download Project SDD File | Total scored cells: 2576 Total media associated with cells: 0 Total labels associated with cell media: 0 |
Characters | |
Total characters: 148 Total characters with associated media: 0 Total characters with media with labels: 0 Total character states: 328 Total character states with associated media: 0 Total character states with media with labels:0 Total unordered/ordered characters:148/0 |
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MorphoBank Project 5213
MorphoBank Project 5213
- Creation Date:
20 April 2024 - Publication Date:
29 April 2024 - Project views: 568
Members
member name | taxa | specimens | media | chars | character
| cell scorings (scored, NPA, "-") | cell
| rules | ||||||
Shreya Jariwala Project Administrator | 25 | 5 | 5 | 148 | 0 | 0 | 2576 (2576, 0, 0) | 0 | 0 | 0 |
Taxonomic Overview for Matrix 'M29792' (25 Taxa)
taxon | unscored cells |
scored cells |
no cell support |
NPA cells |
"-" cells | cell images | labels on cell images |
member access |
[1] † Leptoceratops gracilis Last Modified in 04/21/24 | 54 | 94 | 94 | 0 | 0 | 0 | 0 | 1 |
[2] † Protoceratops andrewsi Last Modified in 04/21/24 | 38 | 110 | 110 | 0 | 0 | 0 | 0 | 1 |
[3] † Zuniceratops christopheri Last Modified in 04/21/24 | 79 | 69 | 69 | 0 | 0 | 0 | 0 | 1 |
[4] † Turanoceratops tardabilis Last Modified in 04/21/24 | 128 | 20 | 20 | 0 | 0 | 0 | 0 | 1 |
[5] † Albertaceratops nesmoi Last Modified in 04/21/24 | 57 | 91 | 91 | 0 | 0 | 0 | 0 | 1 |
[6] † Centrosaurus apertus Last Modified in 04/21/24 | 8 | 140 | 140 | 0 | 0 | 0 | 0 | 1 |
[7] † Pachyrhinosaurus lakustai Last Modified in 04/21/24 | 28 | 120 | 120 | 0 | 0 | 0 | 0 | 1 |
[8] † Chasmosaurus belli Last Modified in 04/21/24 | 3 | 145 | 145 | 0 | 0 | 0 | 0 | 1 |
[9] † Chasmosaurus russelli Last Modified in 04/21/24 | 6 | 142 | 142 | 0 | 0 | 0 | 0 | 1 |
[10] † Mojoceratops perifania Last Modified in 04/21/24 | 47 | 101 | 101 | 0 | 0 | 0 | 0 | 1 |
[11] † Vagaceratops irvinensis Last Modified in 04/21/24 | 22 | 126 | 126 | 0 | 0 | 0 | 0 | 1 |
[12] † Kosmoceratops richardsoni Last Modified in 04/21/24 | 33 | 116 | 115 | 0 | 0 | 0 | 0 | 1 |
[13] † Agujaceratops mariscalensis Last Modified in 04/21/24 | 35 | 113 | 113 | 0 | 0 | 0 | 0 | 1 |
[14] † Utahceratops gettyi Last Modified in 04/21/24 | 21 | 127 | 127 | 0 | 0 | 0 | 0 | 1 |
[15] † Pentaceratops sternbergii Last Modified in 04/21/24 | 5 | 143 | 143 | 0 | 0 | 0 | 0 | 1 |
[16] † Coahuilaceratops magnacuerna Last Modified in 04/21/24 | 95 | 53 | 53 | 0 | 0 | 0 | 0 | 1 |
[17] † Anchiceratops ornatus Last Modified in 04/21/24 | 22 | 126 | 126 | 0 | 0 | 0 | 0 | 1 |
[18] † Arrhinoceratops brachyops Last Modified in 04/21/24 | 45 | 103 | 103 | 0 | 0 | 0 | 0 | 1 |
[19] † Ojoceratops fowleri Last Modified in 04/21/24 | 94 | 54 | 54 | 0 | 0 | 0 | 0 | 1 |
[20] † Torosaurus latus Last Modified in 04/21/24 | 38 | 113 | 110 | 0 | 0 | 0 | 0 | 1 |
[21] † Torosaurus utahensis Last Modified in 04/21/24 | 73 | 75 | 75 | 0 | 0 | 0 | 0 | 1 |
[22] † Eotriceratops xerinsularis Last Modified in 04/21/24 | 94 | 54 | 54 | 0 | 0 | 0 | 0 | 1 |
[23] † Nedoceratops hatcheri Last Modified in 04/21/24 | 69 | 79 | 79 | 0 | 0 | 0 | 0 | 1 |
[24] † Triceratops horridus Last Modified in 04/21/24 | 9 | 139 | 139 | 0 | 0 | 0 | 0 | 1 |
[25] † Triceratops prorsus Last Modified in 04/21/24 | 25 | 123 | 123 | 0 | 0 | 0 | 0 | 1 |
Project views
type | number of views | Individual items viewed (where applicable) |
Total project views | 568 | |
Documents list | 26 | |
Matrix views | 35 | Matrix landing page (29 views); Sampson et al 2010 (6 views); |
Project overview | 32 | |
Media views | 124 | Media search (75 views); M903434 (11 views); M903433 (9 views); M903432 (11 views); M903431 (9 views); M903430 (9 views); |
Views for media list | 29 | |
Bibliography | 20 | |
Specimen list | 121 | |
Taxon list | 181 |