Project 1109: F. C. Montefeltro, J. S. Bittencourt, M. C. Langer, C. L. Schultz. 2013. Postcranial Anatomy of the Hyperodapedontine Rhynchosaur Teyumbaita sulcognathus (Azevedo and Schultz, 1987) from the Late Triassic of Southern Brazil. Journal of Vertebrate Paleontology. 33 (1):67-84.
Specimen: † T sulcognathus (UFRGS/PV:0232T)

Abstract

Teyumbaita sulcognathus is a peculiar endemic Brazilian rhynchosaur that remained somewhat obscure until recently, when its skull anatomy was described and a new generic name was assigned to this highly autapomorphic taxon. Here, the postcranial skeleton of Teyumbaita sulcognathus is for the first time fully described based on the holotype and the two more complete referred specimens. Rhynchosaur postcranial anatomy has usually been considered to be rather conservative, but T. sulcognathus shows unforeseen morphological variation. Autapomorphic traits were added to the diagnosis of T. sulcognathus and intraspecific variation was also identified. In addition, six new phylogeneticaly informative postcranial characters were recognized. Some of these represent apomorphies of clades such as Rhynchosauridae (axis with ventral keel, crest on the anteromedial surface of tibial shaft) and Hyperodapedontinae (postaxial cervical vertebrae with ventral keel, supinator process composed of a low supinator ridge and the ligament groove), revealing new support for their monophyly. The rhynchosaur diversity of the Otter Sandstone Formation (England) was also evaluated based on a phylogenetic analysis. The results suggest that the postcranium EXEMS 79/1992 is more likely related to Fodonyx spenceri than to Bentonyx sidensis.


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Project DOI: 10.7934/P1109, http://dx.doi.org/10.7934/P1109
This project containsMatrices
  • 6 Media
  • 1 Matrix
  • 1 Document
  • 11 Taxa
  • 1 Specimen
  • 65 Characters
Total size of project's media files: 530.11k

Download Project SDD File
Total scored cells: 539
Total media associated with cells: 0
Total labels associated with cell media: 0
Characters
Total characters: 65
Total characters with associated media: 0
Total characters with media with labels: 0
Total character states: 140
Total character states with associated media: 0
Total character states with media with labels:0
Total unordered/ordered characters:65/0
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MorphoBank Project 1109

    Authors' Institutions

    • Universidade Federal de Minas Gerais

    • Universidade Federal do Rio Grande do Sul

    • Universidade de Sao Paulo (USP, University of Sao Paulo)



    Members

    member name taxa specimens media chars character
    media
    labels
    cell scorings
    (scored, NPA, "-")
    cell
    medialabels
    rules
    MorphoBank Curator
    Project Administrator
    11166500539
    (524, 0, 15)
    000
    Maureen Admin
    Full membership
    0000000
    (0, 0, 0)
    000
    Jamal Irving
    Full membership
    0000000
    (0, 0, 0)
    000
    Felipe Montefeltro
    Full membership
    0000000
    (0, 0, 0)
    000


    Taxonomic Overview for Matrix 'M2511' (11 Taxa)

    taxon unscored
    cells
    scored
    cells
    no cell
    support
    NPA
    cells
    "-" cellscell images labels on
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    [1] † Mesosuchus browni
    Last Modified in 02/14/14
    0575708004
    [2] † Howesia browni
    Last Modified in 02/14/14
    11474707004
    [3] † Rhynchosaurus spp.
    Last Modified in 02/14/14
    7585800004
    [4] † Stenaulorhynchus stockleyi
    Last Modified in 02/14/14
    1646400004
    [5] † Mariante rhynchosaur
    Last Modified in 02/14/14
    17484800004
    [6] † Bentonyx sidensis (brsug- 27200)
    Last Modified in 02/14/14
    30353500004
    [7] † Isalorhynchus genovefae
    Last Modified in 02/14/14
    12535300004
    [8] † T sulcognathus
    Last Modified in 02/14/14
    7585800004
    [9] † Hyperodapedon spp.
    Last Modified in 02/14/14
    0786500004
    [10] † Fodonyx spenceri (exems-60-1985.292)
    Last Modified in 02/14/14
    42232300004
    [11] † Hyperodapedontidae
    Last Modified in 03/18/14
    623300004


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    Media views11431Media search (5953 views); M326027 (946 views); M326026 (925 views); M326028 (868 views); M326029 (934 views); M326031 (913 views); M326030 (892 views);
    Project overview4313
    Matrix views3142Matrix landing page (2785 views); Montefeltro et al Matrix (357 views);
    Taxon list11077
    Documents list2213
    Specimen list3274
    Bibliography1242




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    type number of downloads Individual items downloaded (where applicable)
    Total downloads from project364
    Matrix downloads3Montefeltro et al Matrix (3 downloads);
    Project downloads361