Project 854: A. P. Pritchard, A. H. Turner, S. J. Nesbitt, R. B. Irmis, N. D. Smith. 2015. Late Triassic tanystropheids (Reptilia, Archosauromorpha) from northern New Mexico (Petrified Forest Member, Chinle Formation) and the biogeography, functional morphology, and evolution of Tanystropheidae. Journal of Vertebrate Paleontology. 35 (2).
Abstract
We report on tanystropheids from the Late Triassic (middle Norian) Hayden Quarry of northern New Mexico (Chinle Formation, Hayden Quarry). These elements, consisting of isolated vertebrae and appendicular bones, represent the first unambiguously identified tanystropheid from western North America and likely the latest occurrence of the group, post-dating Tanytrachelos in the Eastern United States. A new phylogenetic analysis of early saurians identifies apomorphies of tanystropheid subclades, which are recognized in the recovered vertebrae and a calcaneum. The femora are consistent with referral to Tanystropheidae. However, there is no clear association between the remains so we refrain from erecting a new taxon. The analysis also indicates that the Hayden Quarry tanystropheid fossils belong to a newly recognized subclade including the Late Triassic taxa Langobardisaurus and Tanytrachelos. As most tanystropheid specimens are two-dimensionally crushed skeletons, the Hayden Quarry tanystropheid fossils provide valuable insights into the three-dimensional osteology of derived tanystropheids. The most striking feature of the vertebrae in this group is a rugose, flattened expansion of the neural spines in the dorsal, sacral, and caudal regions. Based on comparisons with living and fossil taxa, we infer that tanystropheids may have developed a robust ligament system for the extension of the post-cervical vertebral column. These fossils and others from Late Triassic sites in the American West suggest that tanystropheids underwent a previously unrecognized radiation in North America just prior to their extinction.Read the article »
Article DOI: 10.1080/02724634.2014.911186
Project DOI: 10.7934/P854, http://dx.doi.org/10.7934/P854
This project contains | Matrices |
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Download Project SDD File ![]() | Total scored cells: 3896 Total media associated with cells: 0 Total labels associated with cell media: 0 |
Characters | |
Total characters: 201 Total characters with associated media: 0 Total characters with media with labels: 0 Total character states: 416 Total character states with associated media: 0 Total character states with media with labels:0 Total unordered/ordered characters:201/0 |
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MorphoBank Project 854
MorphoBank Project 854
- Creation Date:
02 January 2013 - Publication Date:
11 March 2015 - Project views: 46767
- Media downloads: 1
- Matrix downloads: 29
This research
supported by
Authors' Institutions
- Howard University
- Yale University
- Field Museum of Natural History
- Natural History Museum of Utah
- Stony Brook University
Members
member name | taxa ![]() |
specimens ![]() |
media ![]() | chars ![]() | character
| cell scorings (scored, NPA, "-") | cell
| rules ![]() | ||||||
Adam Pritchard Project Administrator | 33 | 0 | 0 | 201 | 0 | 0 | 3889 (3689, 0, 200) | 0 | 0 | 0 | ||||
Maureen Admin Full membership ![]() | 0 | 0 | 0 | 0 | 0 | 0 | 0 (0, 0, 0) | 0 | 0 | 0 | ||||
MorphoBank Curator Full membership ![]() | 1 | 4 | 4 | 0 | 0 | 0 | 0 (0, 0, 0) | 0 | 0 | 0 | ||||
Sterling Nesbitt Full membership ![]() | 0 | 0 | 0 | 0 | 0 | 0 | 7 (7, 0, 0) | 0 | 0 | 0 | ||||
Nathan Smith Full membership ![]() | 0 | 0 | 0 | 0 | 0 | 0 | 0 (0, 0, 0) | 0 | 0 | 0 | ||||
Alan Turner Full membership ![]() | 0 | 0 | 0 | 0 | 0 | 0 | 0 (0, 0, 0) | 0 | 0 | 0 |
Taxonomic Overview for Matrix 'M1926' (33 Taxa)
taxon | unscored cells |
scored cells ![]() |
no cell support ![]() |
NPA cells |
"-" cells | cell images | labels on cell images |
member access |
[1] † Petrolacosaurus kansasensis Last Modified in 12/05/13 | 10 | 179 | 179 | 0 | 12 | 0 | 0 | 6 ![]() |
[2] Uromastyx sp. Last Modified in 12/05/13 | 5 | 171 | 171 | 0 | 25 | 0 | 0 | 6 ![]() |
[3] † Trilophosaurus buettneri Last Modified in 12/05/13 | 8 | 178 | 178 | 0 | 15 | 0 | 0 | 6 ![]() |
[4] † Trilophosaurus jacobsi Last Modified in 12/05/13 | 154 | 45 | 45 | 0 | 2 | 0 | 0 | 6 ![]() |
[5] † Prolacerta broomi Last Modified in 12/05/13 | 10 | 187 | 185 | 0 | 6 | 0 | 0 | 6 ![]() |
[6] † Teraterpeton hrynewichorum Last Modified in 12/05/13 | 100 | 98 | 98 | 0 | 3 | 0 | 0 | 6 ![]() |
[7] † Protorosaurus speneri Last Modified in 12/05/13 | 53 | 140 | 140 | 0 | 8 | 0 | 0 | 6 ![]() |
[8] † Proterosuchus fergusi Last Modified in 12/05/13 | 15 | 182 | 182 | 0 | 4 | 0 | 0 | 6 ![]() |
[9] † Youngina capensis Last Modified in 12/05/13 | 26 | 166 | 166 | 0 | 9 | 0 | 0 | 6 ![]() |
[10] † Gephyrosaurus bridensis Last Modified in 12/05/13 | 40 | 150 | 150 | 0 | 11 | 0 | 0 | 6 ![]() |
[11] † Mesosuchus browni Last Modified in 12/05/13 | 20 | 175 | 174 | 0 | 7 | 0 | 0 | 6 ![]() |
[12] † Rhynchosaurus articeps Last Modified in 12/05/13 | 33 | 152 | 152 | 0 | 16 | 0 | 0 | 6 ![]() |
[13] † Langobardisaurus pandolfii Last Modified in 12/05/13 | 108 | 92 | 92 | 0 | 1 | 0 | 0 | 6 ![]() |
[14] † Langobardisaurus tonelloi Last Modified in 12/05/13 | 113 | 87 | 87 | 0 | 1 | 0 | 0 | 6 ![]() |
[15] † Langobardisaurus pandoflii concatenation Last Modified in 12/05/13 | 92 | 108 | 108 | 0 | 1 | 0 | 0 | 6 ![]() |
[16] † Tanystropheus longobardicus Last Modified in 12/15/13 | 23 | 174 | 173 | 0 | 5 | 0 | 0 | 6 ![]() |
[17] † Tanytrachelos ahynis Last Modified in 12/05/13 | 75 | 122 | 122 | 0 | 4 | 0 | 0 | 6 ![]() |
[18] Hayden Quarry Sacral Last Modified in 12/05/13 | 199 | 1 | 1 | 0 | 1 | 0 | 0 | 6 ![]() |
[19] Hayden Quarry Tanystropheid Last Modified in 12/05/13 | 160 | 40 | 40 | 0 | 1 | 0 | 0 | 6 ![]() |
[20] Hayden Quarry Femur Last Modified in 12/05/13 | 194 | 7 | 7 | 0 | 0 | 0 | 0 | 6 ![]() |
[21] Hayden Quarry Dorsal Last Modified in 12/05/13 | 190 | 11 | 11 | 0 | 0 | 0 | 0 | 6 ![]() |
[22] Hayden Quarry Cervical Last Modified in 12/05/13 | 184 | 17 | 17 | 0 | 0 | 0 | 0 | 6 ![]() |
[23] Hayden Quarry Caudal Last Modified in 12/05/13 | 197 | 4 | 4 | 0 | 0 | 0 | 0 | 6 ![]() |
[24] Hayden Quarry Calcaneum Last Modified in 12/05/13 | 195 | 6 | 6 | 0 | 0 | 0 | 0 | 6 ![]() |
[25] † Macrocnemus bassanii Last Modified in 12/05/13 | 45 | 152 | 152 | 0 | 4 | 0 | 0 | 6 ![]() |
[26] † Macrocnemus fuyuanensis Last Modified in 12/05/13 | 61 | 137 | 137 | 0 | 3 | 0 | 0 | 6 ![]() |
[27] † Amotosaurus rotfeldensis Last Modified in 12/05/13 | 143 | 56 | 56 | 0 | 2 | 0 | 0 | 6 ![]() |
[28] † Erythrosuchus africanus Last Modified in 12/05/13 | 26 | 169 | 169 | 0 | 6 | 0 | 0 | 6 ![]() |
[29] Shinisaurus crocodilurus Last Modified in 12/05/13 | 2 | 183 | 183 | 0 | 16 | 0 | 0 | 6 ![]() |
[30] † Orovenator mayorum Last Modified in 12/05/13 | 127 | 70 | 70 | 0 | 4 | 0 | 0 | 6 ![]() |
[31] † Euparkeria capensis Last Modified in 12/05/13 | 42 | 154 | 154 | 0 | 5 | 0 | 0 | 6 ![]() |
[32] † Batrachotomus kupferzellensis Last Modified in 12/05/13 | 26 | 164 | 163 | 0 | 12 | 0 | 0 | 6 ![]() |
[33] † Teyumbaita sulcognathus Last Modified in 12/05/13 | 66 | 119 | 119 | 0 | 16 | 0 | 0 | 6 ![]() |
Project views 
type | number of views | Individual items viewed (where applicable) |
Total project views | 46767 | |
Project overview | 4842 | |
Matrix views | 3063 | Matrix landing page (2705 views); Archosauromorph Phylogeny for HQ Tanystropheid Paper (358 views); |
Taxon list | 15329 | |
Bibliography | 7197 | |
Media views | 8364 | Media search (5199 views); M376576 (788 views); M376577 (792 views); M376578 (787 views); M376579 (798 views); |
Views for media list | 3580 | |
Specimen list | 4389 | |
Documents list | 3 |
Project downloads 
type | number of downloads | Individual items downloaded (where applicable) |
Total downloads from project | 397 | |
Matrix downloads | 29 | Archosauromorph Phylogeny for HQ Tanystropheid Paper (29 downloads); |
Project downloads | 367 | |
Media downloads | 1 | M376576 (1 download); |