Project 4210: M. A. Baiano, D. Pol, F. Bellardini, G. J. Windholz, I. A. Cerda, A. C. Garrido, R. A. Coria. 2022. Elemgasem nubilus : a new brachyrostran abelisaurid (Theropoda, Ceratosauria) from the Portezuelo Formation (Upper Cretaceous) of Patagonia, Argentina. Papers in Palaeontology. 8 (5):null.
Specimen: † Elemgasem
View: Cervical epipophysis

Abstract

Abelisaurids are medium–large-sized theropod dinosaurs that were predominant in the carnivorous fauna during the Late Cretaceous of Gondwana. These predators are abundant in the Cretaceous fossil strata of Patagonia, which yield the best record for this group. In the Late Cretaceous, abelisaurids appear in almost all regions of Gondwana and in all stages, except for the Coniacian, in which they are globally unknown. Here we describe a new abelisaurid, Elemgasem nubilus gen. et sp. nov., from the Portezuelo Formation (Turonian–Coniacian), Patagonia, Argentina. The palaeohistology of the appendicular bones of Elemgasem shows that the holotype was a subadult individual, but had achieved sexual maturity. This taxon is based on several axial and appendicular elements, and is diagnosed by the presence of a marked pattern of rugosity on the lateral surface of the fibula and a dorsoventrally deep lateral wall of the calcaneum. Moreover, the posterior caudal vertebrae have a morphology slightly different from any other abelisaurid. Elemgasem nubilus is recovered as an unstable taxon within Brachyrostra, given that it was recovered as sister taxon of Furileusauria or in several positions within this clade. Despite the problematic phylogenetic relationships of Elemgasem nubilus, it is important because it is the first abelisaurid from the Turonian–Coniacian interval and it increases the diversity of this theropod family at a time of marked turnover in the tetrapod fauna of South America, global climate change, and mass extinction events
recorded worldwide in the marine realm.


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Article DOI: 10.1002/spp2.1462

Project DOI: 10.7934/P4210, http://dx.doi.org/10.7934/P4210
This project containsMatrices
  • 1 Media
  • 1 Matrix
  • 1 Document
  • 44 Taxa
  • 1 Specimen
  • 235 Characters
Total size of project's media files: 5.91M

Download Project SDD File
Total scored cells: 3488
Total media associated with cells: 0
Total labels associated with cell media: 0
Characters
Total characters: 235
Total characters with associated media: 0
Total characters with media with labels: 0
Total character states: 494
Total character states with associated media: 0
Total character states with media with labels:0
Total unordered/ordered characters:235/0
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MorphoBank Project 4210

    Authors' Institutions

    • Museo Paleontológico Egidio Feruglio

    • Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET)

    • Universidad Nacional de Rio Negro

    • Museo Municipal Ernesto Bachmann

    • Instituto de Investigación en Paleobiología y Geología (IIPG)



    Members

    member name taxa specimens media chars character
    media
    labels
    cell scorings
    (scored, NPA, "-")
    cell
    medialabels
    rules
    Mattia Baiano
    Project Administrator
    4411235003488
    (3483, 0, 5)
    000
    Flavio Bellardini
    Full membership
    0000000
    (0, 0, 0)
    000
    Ignacio Cerda
    Full membership
    0000000
    (0, 0, 0)
    000
    Rodolfo Coria
    Full membership
    0000000
    (0, 0, 0)
    000
    Alberto Garrido
    Full membership
    0000000
    (0, 0, 0)
    000
    Diego Pol
    Full membership
    0000000
    (0, 0, 0)
    000
    Guillermo Windholz
    Full membership
    0000000
    (0, 0, 0)
    000


    Taxonomic Overview for Matrix 'M28724' (43 Taxa)

    taxon unscored
    cells
    scored
    cells
    no cell
    support
    NPA
    cells
    "-" cellscell images labels on
    cell images
    member
    access
    [1] † Herrerasaurus
    Last Modified in 03/28/23
    523122901007
    [2] † Syntarsus
    Last Modified in 03/28/23
    323323200007
    [3] † Dilophosaurus
    Last Modified in 03/28/23
    3919819600007
    [4] † Allosaurus
    Last Modified in 03/28/23
    123423301007
    [5] † Abelisaurus
    Last Modified in 03/28/23
    172636300007
    [6] † Aucasaurus
    Last Modified in 03/28/23
    13410210100007
    [7] † Arcovenator
    Last Modified in 03/28/23
    192454300007
    [8] † Berberosaurus
    Last Modified in 03/28/23
    206322900007
    [9] † Carnotaurus
    Last Modified in 03/28/23
    3819719700007
    [10] † CCG 20011
    Last Modified in 03/28/23
    212242300007
    [11] † Ceratosaurus
    Last Modified in 03/28/23
    1222622300007
    [12] † Dahalokely
    Last Modified in 03/28/23
    205313000007
    [13] † Ekrixinatosaurus
    Last Modified in 03/28/23
    162747300007
    [14] † Elaphrosaurus
    Last Modified in 03/28/23
    12611010900007
    [15] † Eoabelisaurus
    Last Modified in 03/28/23
    7516415901007
    [16] † Genusaurus
    Last Modified in 03/28/23
    210262500007
    [17] † Genyodectes
    Last Modified in 03/28/23
    222141300007
    [18] † Huinculsaurus
    Last Modified in 03/28/23
    221141400007
    [19] † Ilokelesia
    Last Modified in 03/28/23
    186494900007
    [20] † Indosaurus
    Last Modified in 03/28/23
    221141400007
    [21] † Kryptops
    Last Modified in 03/28/23
    222131300007
    [22] † Laevisuchus
    Last Modified in 03/28/23
    220161500007
    [23] † Limusaurus
    Last Modified in 03/28/23
    11412311902007
    [24] † Majungasaurus
    Last Modified in 03/28/23
    1821921700007
    [25] † Masiakasaurus
    Last Modified in 03/28/23
    6017617500007
    [26] † Noasaurus
    Last Modified in 03/28/23
    198383700007
    [27] † Pycnonemosaurus
    Last Modified in 03/28/23
    222131300007
    [28] † Rahiolisaurus
    Last Modified in 03/28/23
    171656400007
    [29] † Rajasaurus
    Last Modified in 03/28/23
    172636300007
    [30] † Rugops
    Last Modified in 03/28/23
    191444400007
    [31] † Skorpiovenator
    Last Modified in 03/28/23
    141959400007
    [32] † MNN tig6
    Last Modified in 03/28/23
    200363500007
    [33] † Spectrovenator
    Last Modified in 03/28/23
    10613312900007
    [34] † Velocisaurus
    Last Modified in 03/28/23
    209262600007
    [35] † Vespersaurus
    Last Modified in 03/28/23
    152858300007
    [36] † Viavenator
    Last Modified in 03/28/23
    154818100007
    [37] † MPCN pv 69
    Last Modified in 03/28/23
    214212100007
    [38] † Afromimus
    Last Modified in 03/28/23
    225101000007
    [39] † Xenotarsosaurus
    Last Modified in 03/28/23
    206302900007
    [40] † Llukalkan
    Last Modified in 03/28/23
    172636300007
    [41] † Niebla
    Last Modified in 03/28/23
    209262600007
    [42] † Quilmesaurus
    Last Modified in 03/28/23
    225111000007
    [43] † Elemgasem
    Last Modified in 03/28/23
    220151500007


    Project views

    type number of views Individual items viewed (where applicable)
    Total project views5467
    Project overview387
    Matrix views269Matrix landing page (217 views); Elemgasem nubilus gen. et sp. nov., a new brachyrostran abelisaurid (Theropoda, Ceratosauria) from the Portezuelo Formation (Upper Cretaceous) of Patagonia, Argentina (52 views);
    Media views975Media search (833 views); M846650 (142 views);
    Documents list197
    Views for media list465
    Taxon list2553
    Specimen list460
    Bibliography161




    Project downloads

    type number of downloads Individual items downloaded (where applicable)
    Total downloads from project11
    Matrix downloads4Elemgasem nubilus gen. et sp. nov., a new brachyrostran abelisaurid (Theropoda, Ceratosauria) from the Portezuelo Formation (Upper Cretaceous) of Patagonia, Argentina (4 downloads);
    Project downloads6
    Document downloads1Elemgasem nubilus gen. et sp. nov., a new brachyrostran abelisaurid (Theropoda, Ceratosauria) from the Portezuelo Formation (Upper Cretaceous) of Patagonia, Argentina (1 download);