Project 1223: T. P. Melo, F. Abdala, M. B. Soares. 2015. The Malagasy Cynodont Menadon Besairiei (Cynodontia; Traversodontidae) in the Middle–Upper Triassic of Brazil. Journal of Vertebrate Paleontology. 35 (4):1-13.
Specimen: † Menadon (UFRGS/PV:UFRGS-PV-1164-T)

Abstract

The traversodontid cynodont Menadon besairiei, previously known from the ‘Isalo II’ group of Madagascar, is reported for the first time from the Triassic of southern Brazil. New material referable to M. besairiei was collected in the Schoenstatt outcrop (Santa Cruz do Sul municipality), which belongs to the Santacruzodon Assemblage Zone (Carnian) in the Santa Maria Supersequence. Their attribution to the Malagasy taxon is based on the presence of a deep snout; four upper incisors, with procumbent first and second incisors, and three lower, procumbent incisors; five upper postcanines, the first one ‘peg-like’; six lower postcanines, the two most anterior and the most posterior being reduced; the quadrangular form of the postcanines; a pterygoid reaching the jugal and excluding the maxilla from the suborbital fenestra; a mandible with a tall coronoid process covering the last lower postcanine laterally; and a posteriorly projected angular process. A cladistic analysis of traversodontid cynodonts was performed based on a matrix composed of 30 taxa and 78 characters. In the resulting trees, M. besairiei nested within the clade Gomphodontosuchinae, the only traversodontid subclade reasonably well supported. Thus, the presence of M. besairiei is established in the Santa Cruz do Sul fauna, constituting the first record for South America and confirming the previously proposed biostratigraphic correlation between the ‘Isalo II’ and the Santacruzodon Assemblage Zone.


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Article DOI: 10.1080/02724634.2014.1002562

Project DOI: 10.7934/P1223, http://dx.doi.org/10.7934/P1223
This project containsMatrices
  • 1 Media
  • 1 Matrix
  • 30 Taxa
  • 1 Specimen
  • 78 Characters
Total size of project's media files: 1 MB

Download Project SDD File
Total scored cells: 1725
Total media associated with cells: 0
Total labels associated with cell media: 0
Characters
Total characters: 78
Total characters with associated media: 0
Total characters with media with labels: 0
Total character states: 176
Total character states with associated media: 0
Total character states with media with labels:0
Total unordered/ordered characters:69/9
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MorphoBank Project 1223


    Members

    member name taxa specimens media chars character
    media
    labels
    cell scorings
    (scored, NPA, "-")
    cell
    medialabels
    rules
    Fernando Abdala
    Project Administrator
    Last logged in 12/14/15
    301178001725
    (1705, 0, 20)
    000
    Tomaz Panceri Melo
    Full membership
    Last logged in 09/09/15
    0000000
    (0, 0, 0)
    000


    Taxonomic Overview for Matrix 'M2788' (30 Taxa)

    taxon unscored
    cells
    scored
    cells
    no cell
    support
    NPA
    cells
    "-" cellscell images labels on
    cell images
    member
    access
    [1] † Thrinaxodon
    Last Modified in 12/14/15
    21555502002
    [2] † Cynognathus
    Last Modified in 12/14/15
    21555502002
    [3] † Diademodon
    Last Modified in 12/14/15
    4747301002
    [4] † Beishanodon
    Last Modified in 12/14/15
    41373700002
    [5] † Cricodon
    Last Modified in 12/14/15
    26525200002
    [6] † Langbergia
    Last Modified in 12/14/15
    15636300002
    [7] † Sinognathus
    Last Modified in 12/14/15
    24545400002
    [8] † Trirachodon
    Last Modified in 12/14/15
    5777300002
    [9] † JSM100
    Last Modified in 12/14/15
    36424200002
    [10] † Andescynodon
    Last Modified in 12/14/15
    8696901002
    [11] † Arctotraversodon
    Last Modified in 12/14/15
    46323200002
    [12] † Boreogomphodon jeffersoni
    Last Modified in 12/14/15
    9736900002
    [13] † Dadadon
    Last Modified in 12/14/15
    14646400002
    [14] † Exaeretodon argentinus
    Last Modified in 12/14/15
    4727202002
    [15] † Exaeretodon riograndensis
    Last Modified in 12/14/15
    11656502002
    [16] † Gomphodontosuchus
    Last Modified in 12/14/15
    31454502002
    [17] † Luangwa drysdalli
    Last Modified in 12/14/15
    8717000002
    [18] † Luangwa sudamericana
    Last Modified in 12/14/15
    23555500002
    [19] † Massetognathus ochagaviae
    Last Modified in 12/14/15
    15646300002
    [20] † Massetognathus pascuali
    Last Modified in 12/14/15
    1797700002
    [21] † Menadon
    Last Modified in 12/14/15
    9656504002
    [22] † Pascualgnathus
    Last Modified in 12/14/15
    12656501002
    [23] † Protuberum
    Last Modified in 12/14/15
    30474701002
    [24] † Santacruzodon
    Last Modified in 12/14/15
    26525200002
    [25] † Scalenodon angustifrons
    Last Modified in 12/14/15
    19605900002
    [26] † Mandagomphodon attridgei
    Last Modified in 12/14/15
    40383800002
    [27] † Mandagomphodon hirschoni
    Last Modified in 12/14/15
    19595900002
    [28] † Scalenodontoides
    Last Modified in 12/14/15
    25515102002
    [29] † Traversodon
    Last Modified in 12/14/15
    19595900002
    [30] † Nanogomphodon
    Last Modified in 12/14/15
    67111100002


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    Total project views11559
    Project overview1563
    Matrix views1305Matrix landing page (1137 views); The Malagasy cynodont Menadon besairiei (Cynodontia; Traversodontidae) in the Upper Triassic of Brazil (168 views);
    Media views2676Media search (2325 views); M406344 (351 views);
    Taxon list4374
    Specimen list1048
    Bibliography593




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    Total downloads from project176
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    Matrix downloads7The Malagasy cynodont Menadon besairiei (Cynodontia; Traversodontidae) in the Upper Triassic of Brazil (7 downloads);