Project 4149: C. Marsicano, K. D. Angielczyk, J. C. Cisneros, M. Richter, C. F. Kammerer, J. Fröbisch, R. M. Smith. 2021. Brazilian Permian dvinosaurs (Amphibia, Temnospondyli): revised description and phylogeny. Journal of Vertebrate Paleontology. 41 (1):null.
Specimen: † Eryops megacephalus (unvouchered)
View: fossil

Abstract

Recently collected temnospondyl fossils from the Cisuralian Pedra de Fogo Formation (north-eastern Brazil) indicate a diverse assemblage of aquatic tetrapods, including the dvinosaurs Timonya anneae and Procuhy nazariensis. Here we present revised diagnoses for these species and detailed descriptions of their holotypes. Timonya anneae is distinguished from all other dvinosaurs by several cranial characters including: combined width of both parietals less than interorbital width; presence of a groove-like internal carotid artery foramen; and presence of an ossified opisthotic. In the mandible, T. anneae presents two parasymphyseal fossae on each side of the mandibular symphysis to accommodate palatal fangs and a well-developed postglenoid area. Procuhy nazariensis, mostly preserved as a mold of the skull table and mandible, is diagnosed by the presence of the anteriormost extension of the squamosal posterior to parietal midlength; pineal foramen posterior to the midlength of the parietal; supratemporal exposed on the posterior border of the skull table; and presence of postglenoid process of the surangular separated from the retroarticular process of the articular by the mandibular sulcus. A new inclusive phylogeny of Temnospondyli indicates that Dvinosauria consists of the Trimerorhachidae (including Procuhy as the sister-taxon of Trimerorhachis) and the ‘short-snouted’ dvinosaurs, with Timonya as an early-diverging representative of the latter clade. The Pedra de Fogo dvinosaurs show close relationships with Cisuralian taxa from the North American southwest, reinforcing close paleogeographic connections between these regions in the late Paleozoic, but represent endemic taxa, corroborating the pattern suggested by the plant fossil record.


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Article DOI: 10.1080/02724634.2021.1893181

Project DOI: 10.7934/P4149, http://dx.doi.org/10.7934/P4149
This project containsMatrices
  • 1 Media
  • 1 Matrix
  • 40 Taxa
  • 1 Specimen
  • 178 Characters
Total size of project's media files: 1.72M

Download Project SDD File
Total scored cells: 5881
Total media associated with cells: 0
Total labels associated with cell media: 0
Characters
Total characters: 178
Total characters with associated media: 0
Total characters with media with labels: 0
Total character states: 418
Total character states with associated media: 0
Total character states with media with labels:0
Total unordered/ordered characters:178/0
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MorphoBank Project 4149

    Authors' Institutions

    • Iziko South African Museum, Cape Town

    • Museum für Naturkunde - Leibniz-Institut für Evolutions- und Biodiversitätsforschung, Berlin

    • Natural History Museum, London

    • North Carolina Museum of Natural Sciences, Raleigh

    • Humboldt-Universitaet zu Berlin (Humboldt University Berlin)

    • University of the Witwatersrand

    • Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET)

    • IDEAN

    • Universidad de Buenos Aires

    • Field Museum of Natural History

    • Universidade Federal do Piauí



    Members

    member name taxa specimens media chars character
    media
    labels
    cell scorings
    (scored, NPA, "-")
    cell
    medialabels
    rules
    MorphoBank Curator
    Project Administrator
    4011178005881
    (5803, 0, 78)
    000
    Jörg Fröbisch
    Full membership
    0000000
    (0, 0, 0)
    000
    Christian Kammerer
    Full membership
    0000000
    (0, 0, 0)
    000
    Martha Richter
    Full membership
    0000000
    (0, 0, 0)
    000
    Roger Smith
    Full membership
    0000000
    (0, 0, 0)
    000


    Taxonomic Overview for Matrix 'M27727' (40 Taxa)

    taxon unscored
    cells
    scored
    cells
    no cell
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    NPA
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    [1] † Crassigyrinus scoticus
    Last Modified in 12/10/21
    211531530400none
    [2] † Greererpeton burkermorani
    Last Modified in 12/10/21
    41721720200none
    [3] † Caerorhachis bairdi
    Last Modified in 12/10/21
    541231230100none
    [4] † Proterogyrinus scheelei
    Last Modified in 12/10/21
    161591590300none
    [5] † Eucritta melanolimnetes
    Last Modified in 12/10/21
    701051050300none
    [6] † Edops craigi
    Last Modified in 12/10/21
    231551550000none
    [7] † Adamanterpeton ohioensis
    Last Modified in 12/10/21
    531231230200none
    [8] † Nigerpeton ricqlesi
    Last Modified in 12/10/21
    631141140100none
    [9] † Chenoprosopus lewisi
    Last Modified in 12/10/21
    591191190000none
    [10] † Cochleosaurus bohemicus
    Last Modified in 12/10/21
    331431430200none
    [11] † Capetus palustris
    Last Modified in 12/10/21
    581191190100none
    [12] † Saharastega moradiensis
    Last Modified in 12/10/21
    621141140200none
    [13] † Acanthostomatops vorax
    Last Modified in 12/10/21
    361401400200none
    [14] † Eryops megacephalus
    Last Modified in 12/10/21
    11771770000none
    [15] † Balanerpeton woodi
    Last Modified in 12/10/21
    171601600100none
    [16] † Dendrerpeton acadianum
    Last Modified in 12/10/21
    361421420000none
    [17] † Dvinosaurus primus
    Last Modified in 12/10/21
    21721720400none
    [18] † Erpetosaurus radiatus
    Last Modified in 12/10/21
    411361360100none
    [19] † Neldasaurus wrightae
    Last Modified in 12/10/21
    211551550200none
    [20] † Trimerorhachis insignis
    Last Modified in 12/10/21
    21751750100none
    [21] † Timonya anneae
    Last Modified in 12/10/21
    261481480400none
    [22] † Acroplous vorax
    Last Modified in 12/10/21
    91651650400none
    [23] † Thabanchuia oomie
    Last Modified in 12/10/21
    241491490500none
    [24] † Perryella olsoni
    Last Modified in 12/10/21
    451301300300none
    [25] † Micropholis stowi
    Last Modified in 12/10/21
    71681680300none
    [26] † Sclerocephalus haeuseri
    Last Modified in 12/10/21
    31741740100none
    [27] † Archegosaurus decheni
    Last Modified in 12/10/21
    81691690100none
    [28] † Uranocentrodon senekalensis
    Last Modified in 12/10/21
    131641640100none
    [29] † Australerpeton cosgriffi
    Last Modified in 12/10/21
    71711710000none
    [30] † Lydekkerina huxleyi
    Last Modified in 12/10/21
    21761760000none
    [31] † Laidleria gracilis
    Last Modified in 12/10/21
    361371370500none
    [32] † Batrachosuchus browni
    Last Modified in 12/10/21
    641101100400none
    [33] † Benthosuchus sushkini
    Last Modified in 12/10/21
    21761760000none
    [34] † Mastodonsaurus giganteus
    Last Modified in 12/10/21
    131641640100none
    [35] † Thoosuchus yakovlevi
    Last Modified in 12/10/21
    281501500000none
    [36] † Metoposaurus diagnosticus
    Last Modified in 12/10/21
    11771770000none
    [37] † Procuhy nazariensis
    Last Modified in 12/10/21
    14037370100none
    [38] † Isodectes obtusus
    Last Modified in 12/10/21
    551191190400none
    [39] † Trypanognathus remigiusbergensis
    Last Modified in 12/10/21
    461271270500none
    [40] † Tupilakosaurus wetlugensis
    Last Modified in 12/10/21
    381361360400none


    Project views

    type number of views Individual items viewed (where applicable)
    Total project views719
    Project overview54
    Matrix views47Matrix landing page (46 views); Data matrix from supplemental material (1 view);
    Bibliography30
    Media views172Media search (149 views); M834713 (23 views);
    Taxon list301
    Specimen list73
    Views for media list42




    Project downloads

    type number of downloads Individual items downloaded (where applicable)
    Total downloads from project16
    Project downloads15
    Matrix downloads1Data matrix from supplemental material (1 download);