Project 3508: J. W. Martz, B. J. Small. 2019. Non-dinosaurian dinosauromorphs from the Chinle Formation (Upper Triassic) of the Eagle Basin, northern Colorado: Dromomeron romeri (Lagerpetidae) and a new taxon, Kwanasaurus williamparkeri (Silesauridae). PeerJ. 7:e7551.
Abstract
The “red siltstone” member of the Upper Triassic Chinle Formation in the Eagle Basin of Colorado contains a diverse assemblage of dinosauromorphs falling outside of Dinosauria. This assemblage is the northernmost known occurrence of non-dinosaurian dinosauromorphs in North America, and probably falls within the Revueltian land vertebrate estimated biochronozone (215-207 Ma, middle to late Norian). Lagerpetids are represented by proximal femora and a humerus referable to Dromomeron romeri. Silesaurids (non-dinosaurian dinosauriforms) are the most commonly recovered dinosauromorph elements, consisting of dentaries, maxillae, isolated teeth, humeri, illia, femora, and possibly a scapula and tibiae. These elements represent a new silesaurid, Kwanasaurus williamparkeri, gen. et sp. nov., which possesses several autapomorphies: a short, very robust maxilla with a broad ascending process, a massive ventromedial process, a complex articular surface for the lacrimal and jugal, and twelve teeth; fourteen dentary teeth; an ilium with an elongate and blade-like preacetabular process and concave acetabular margin; a femur with an extremely thin medial distal condyle and a depression on the distal end anterior to the crista tibiofibularis. The recognition of K. williamparkeri further demonstrates the predominantly Late Triassic diversity and widespread geographic distribution across Pangea of the sister clade to Asilisaurus, here named Sulcimentisauria. Silesaurid dentition suggests a variety of dietary specializations from faunivory and omnivory in the Middle Triassic and early Late Triassic (Carnian), to herbivory in the Late Triassic (Carnian and Norian), with the latter specialization coinciding with the radiation of Sulcimentisauria across Pangea. The extremely robust maxilla and folidont teeth of K. williamparkei may represent the most pronounced herbivorous dietary specialization known among silesaurids.Read the article »
Article DOI: 10.7717/peerj.7551
Project DOI: 10.7934/P3508, http://dx.doi.org/10.7934/P3508
This project contains | Matrices |
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Download Project SDD File | Total scored cells: 6623 Total media associated with cells: 0 Total labels associated with cell media: 0 |
Characters | |
Total characters: 294 Total characters with associated media: 0 Total characters with media with labels: 0 Total character states: 655 Total character states with associated media: 0 Total character states with media with labels:0 Total unordered/ordered characters:294/0 |
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MorphoBank Project 3508
MorphoBank Project 3508
- Creation Date:
05 August 2019 - Publication Date:
05 August 2019 - Project views: 14683
- Matrix downloads: 12
Authors' Institutions
- Museum of Texas Tech University, Lubbock
- Denver Museum of Nature and Science
- University of Houston-Downtown
Members
member name | taxa | specimens | media | chars | character
| cell scorings (scored, NPA, "-") | cell
| rules | ||||||
Jeffrey Martz Project Administrator | 39 | 1 | 1 | 294 | 0 | 0 | 6623 (6623, 0, 0) | 0 | 0 | 0 |
Taxonomic Overview for Matrix 'M26167' (39 Taxa)
taxon | unscored cells |
scored cells |
no cell support |
NPA cells |
"-" cells | cell images | labels on cell images |
member access |
[1] † Erythrosuchus africanus Last Modified in 08/05/19 | 30 | 264 | 264 | 0 | 0 | 0 | 0 | 1 |
[2] † Euparkeria capensis Last Modified in 08/05/19 | 12 | 283 | 282 | 0 | 0 | 0 | 0 | 1 |
[3] † Revueltosaurus callenderi Last Modified in 08/05/19 | 31 | 263 | 263 | 0 | 0 | 0 | 0 | 1 |
[4] † Aetosaurus ferratus Last Modified in 08/05/19 | 98 | 197 | 196 | 0 | 0 | 0 | 0 | 1 |
[5] † Arizonasaurus babbitti Last Modified in 08/05/19 | 116 | 178 | 178 | 0 | 0 | 0 | 0 | 1 |
[6] † Effigia okeeffeae Last Modified in 08/05/19 | 73 | 221 | 221 | 0 | 0 | 0 | 0 | 1 |
[7] † Batrachotomus kuperferzellensis Last Modified in 08/05/19 | 43 | 251 | 251 | 0 | 0 | 0 | 0 | 1 |
[8] † Postosuchus kirkpatricki Last Modified in 08/05/19 | 52 | 242 | 242 | 0 | 0 | 0 | 0 | 1 |
[9] † Dromicosuchus grallator Last Modified in 08/05/19 | 92 | 202 | 202 | 0 | 0 | 0 | 0 | 1 |
[10] † Eudimorphodon ranzii Last Modified in 08/05/19 | 151 | 143 | 143 | 0 | 0 | 0 | 0 | 1 |
[11] † Dimorphodon macronyx Last Modified in 08/05/19 | 134 | 160 | 160 | 0 | 0 | 0 | 0 | 1 |
[12] † Lagerpeton chanarensis Last Modified in 08/05/19 | 183 | 111 | 111 | 0 | 0 | 0 | 0 | 1 |
[13] † Dromomeron gregorii Last Modified in 08/05/19 | 257 | 37 | 37 | 0 | 0 | 0 | 0 | 1 |
[14] † Dromomeron romeri Last Modified in 08/05/19 | 236 | 58 | 58 | 0 | 0 | 0 | 0 | 1 |
[15] † Marasuchus lilloensis Last Modified in 08/05/19 | 135 | 159 | 159 | 0 | 0 | 0 | 0 | 1 |
[16] † Lewisuchus/Pseudolagosuchus Last Modified in 08/05/19 | 135 | 159 | 159 | 0 | 0 | 0 | 0 | 1 |
[17] † Asilisaurus kongwe Last Modified in 08/05/19 | 151 | 143 | 143 | 0 | 0 | 0 | 0 | 1 |
[18] † Lutungutali sitwensis Last Modified in 08/05/19 | 237 | 57 | 57 | 0 | 0 | 0 | 0 | 1 |
[19] † Eucoelophysis baldwini Last Modified in 08/05/19 | 253 | 41 | 41 | 0 | 0 | 0 | 0 | 1 |
[20] † Sacisaurus agudoensis Last Modified in 08/05/19 | 216 | 78 | 78 | 0 | 0 | 0 | 0 | 1 |
[21] † Silesaurus opolensis Last Modified in 08/05/19 | 46 | 249 | 248 | 0 | 0 | 0 | 0 | 1 |
[22] † Pisanosaurus mertii Last Modified in 08/05/19 | 219 | 75 | 75 | 0 | 0 | 0 | 0 | 1 |
[23] † Heterodontosaurus tucki Last Modified in 08/05/19 | 49 | 247 | 245 | 0 | 0 | 0 | 0 | 1 |
[24] † Lesothosaurus dianosticus Last Modified in 08/05/19 | 57 | 237 | 237 | 0 | 0 | 0 | 0 | 1 |
[25] † Herrerasaurus ischigualastensis Last Modified in 08/05/19 | 38 | 256 | 256 | 0 | 0 | 0 | 0 | 1 |
[26] † Eoraptor lunensis Last Modified in 08/05/19 | 90 | 205 | 204 | 0 | 0 | 0 | 0 | 1 |
[27] † Saturnalia tupiniquim Last Modified in 08/05/19 | 136 | 158 | 158 | 0 | 0 | 0 | 0 | 1 |
[28] † Plateosaurus engelhardti Last Modified in 08/05/19 | 18 | 276 | 276 | 0 | 0 | 0 | 0 | 1 |
[29] † Efraasia minor Last Modified in 08/05/19 | 54 | 240 | 240 | 0 | 0 | 0 | 0 | 1 |
[30] † Tawa hallae Last Modified in 08/05/19 | 42 | 252 | 252 | 0 | 0 | 0 | 0 | 1 |
[31] † Coelophysis bauri Last Modified in 08/05/19 | 27 | 267 | 267 | 0 | 0 | 0 | 0 | 1 |
[32] † Dilophosaurus wetherelli Last Modified in 08/05/19 | 44 | 250 | 250 | 0 | 0 | 0 | 0 | 1 |
[33] † Allosaurus fragilis Last Modified in 08/05/19 | 21 | 273 | 273 | 0 | 0 | 0 | 0 | 1 |
[34] † Velociraptor mongoliensis Last Modified in 08/05/19 | 51 | 243 | 243 | 0 | 0 | 0 | 0 | 1 |
[35] † Kwanasaurus williamparkeri Last Modified in 08/05/19 | 214 | 81 | 80 | 0 | 0 | 0 | 0 | 1 |
[36] † Technosaurus smalli Last Modified in 08/05/19 | 285 | 10 | 9 | 0 | 0 | 0 | 0 | 1 |
[37] † Soumyasaurus aenigmaticus Last Modified in 08/05/19 | 286 | 8 | 8 | 0 | 0 | 0 | 0 | 1 |
[38] † Diodorus scytobrachion Last Modified in 08/05/19 | 257 | 37 | 37 | 0 | 0 | 0 | 0 | 1 |
[39] † Ignotosaurus fragilis Last Modified in 08/05/19 | 282 | 12 | 12 | 0 | 0 | 0 | 0 | 1 |
Project views
type | number of views | Individual items viewed (where applicable) |
Total project views | 14683 | |
Project overview | 1238 | |
Media views | 2723 | Media search (2336 views); M675956 (387 views); |
Views for media list | 816 | |
Specimen list | 1440 | |
Taxon list | 6997 | |
Bibliography | 597 | |
Matrix views | 871 | Matrix landing page (773 views); Phylogenetic Analysis of Silesauridae (Dinosauriformes) (from Martz and Small, 2019, modified from Peecook et al., 2013). (98 views); |
Documents list | 1 |
Project downloads
type | number of downloads | Individual items downloaded (where applicable) |
Total downloads from project | 142 | |
Project downloads | 130 | |
Matrix downloads | 12 | Phylogenetic Analysis of Silesauridae (Dinosauriformes) (from Martz and Small, 2019, modified from Peecook et al., 2013). (12 downloads); |