Project 5272: F. R. O'Keefe, H. P. Street. 2009. Osteology of the cryptocleidoid plesiosaurTatenectes laramiensis, with comments on the taxonomic status of the Cimoliasauridae. Journal of Vertebrate Paleontology. 29 (1):48-57.
Abstract
Recent field work in the Bighorn Basin, Wyoming has recovered significant new material of the plesiosaur Tatenectes laramiensis. The majority of cryptocleidoid plesiosaurs have been recovered from Middle and Upper Jurassic units (Oxford and Kimmeridge Clays, respectively) in the United Kingdom, but Tatenectes laramiensis is one of at least two cryptocleidoids known from the Upper Sundance Member of the Sundance Formation (Oxfordian) of North Ame-rica. Although poorly known, they bear directly on both the phylogeny and biogeography of the cryptocleidoid plesio-saurs. Here we describe new fossil material of Tatenectes, and reevaluate the phylogenetic position of this genus based on all known material. New material includes a partial skeleton comprising cranial elements, axial column, and a partial pectoral girdle, as well as an isolated humerus and vertebrae. The pectoral girdle closely resembles that of Muraenosaurus beloclis from the Oxford Clay, but is even shorter anteriorly. The cervical vertebrae are more compressed antero-posteriorly than in other Jurassic cryptocleidoids. The humerus is less derived, resembling that of Tricleidus seeleyi. Two most parsimonious trees were obtained, and the consensus tree solidifies the phylogenetic position of Tatenectes as being most closely related to the Oxford Clay taxon Kimmerosaurus.Read the article »
Article DOI: 10.1671/039.029.0118
Project DOI: 10.7934/P5272, http://dx.doi.org/10.7934/P5272
This project contains | Matrices |
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Download Project SDD File | Total scored cells: 930 Total media associated with cells: 0 Total labels associated with cell media: 0 |
Characters | |
Total characters: 90 Total characters with associated media: 0 Total characters with media with labels: 0 Total character states: 208 Total character states with associated media: 0 Total character states with media with labels:0 Total unordered/ordered characters:90/0 |
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MorphoBank Project 5272
MorphoBank Project 5272
- Creation Date:
30 May 2024 - Publication Date:
02 July 2024
Authors' Institutions
- Marshall University
Members
member name | taxa | specimens | media | chars | character
| cell scorings (scored, NPA, "-") | cell
| rules | ||||||
Shreya Jariwala Project Administrator | 14 | 6 | 6 | 90 | 0 | 0 | 930 (923, 0, 7) | 0 | 0 | 0 |
Taxonomic Overview for Matrix 'M29853' (14 Taxa)
taxon | unscored cells |
scored cells |
no cell support |
NPA cells |
"-" cells | cell images | labels on cell images |
member access |
[1] † Plesiosaurus Taxon name last Modified on 05/30/24 | 6 | 84 | 84 | 0 | 0 | 0 | 0 | 1 |
[2] † Muraenosaurus Taxon name last Modified on 05/30/24 | 4 | 86 | 86 | 0 | 0 | 0 | 0 | 1 |
[3] † Cryptoclidus Taxon name last Modified on 05/30/24 | 1 | 89 | 89 | 0 | 0 | 0 | 0 | 1 |
[4] † Tricleidus Taxon name last Modified on 05/30/24 | 7 | 83 | 83 | 0 | 0 | 0 | 0 | 1 |
[5] † Kimmerosaurus Taxon name last Modified on 05/30/24 | 41 | 50 | 49 | 0 | 0 | 0 | 0 | 1 |
[6] † Aristonectes Taxon name last Modified on 05/30/24 | 57 | 32 | 32 | 0 | 1 | 0 | 0 | 1 |
[7] † Edgarosaurus Taxon name last Modified on 05/30/24 | 35 | 55 | 55 | 0 | 0 | 0 | 0 | 1 |
[8] † Polycotylus Taxon name last Modified on 05/30/24 | 37 | 53 | 53 | 0 | 0 | 0 | 0 | 1 |
[9] † Dolichorhynchops Taxon name last Modified on 05/30/24 | 1 | 88 | 88 | 0 | 1 | 0 | 0 | 1 |
[10] † Trinacromerum Taxon name last Modified on 05/30/24 | 10 | 79 | 79 | 0 | 1 | 0 | 0 | 1 |
[11] † Brancasaurus Taxon name last Modified on 05/30/24 | 21 | 68 | 68 | 0 | 1 | 0 | 0 | 1 |
[12] † Tatenectes Taxon name last Modified on 05/30/24 | 44 | 44 | 44 | 0 | 2 | 0 | 0 | 1 |
[13] † Kaiwhekea Taxon name last Modified on 05/30/24 | 57 | 32 | 32 | 0 | 1 | 0 | 0 | 1 |
[14] † Thalassiodracon Taxon name last Modified on 05/30/24 | 10 | 80 | 80 | 0 | 0 | 0 | 0 | 1 |