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: 1 MB

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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


    Members

    member name taxa specimens media chars character
    media
    labels
    cell scorings
    (scored, NPA, "-")
    cell
    medialabels
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    MorphoBank Curator
    Project Administrator
    Last logged in 03/19/14
    11166500539
    (524, 0, 15)
    000
    Maureen Admin
    Full membership
    Last logged in 03/19/14
    0000000
    (0, 0, 0)
    000
    Jamal Irving
    Full membership
    Last logged in Never
    0000000
    (0, 0, 0)
    000
    Felipe Montefeltro
    Full membership
    Last logged in 03/18/14
    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
    cell images
    member
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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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    Project overview3026
    Matrix views2321Matrix landing page (2072 views); Montefeltro et al Matrix (249 views);
    Taxon list6237
    Documents list1652
    Specimen list2082
    Bibliography768




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    Matrix downloads2Montefeltro et al Matrix (2 downloads);
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