Project 3267: O. W. M. Rauhut, D. Pol. 2019. Probable basal allosauroid from the early Middle Jurassic Cañadón Asfalto Formation of Argentina highlights phylogenetic uncertainty in tetanuran theropod dinosaurs. Scientific Reports. 9:18826.
Specimen: † Asfaltovenator vialidadi (MPEF/PV:3440)
View: Reconstruction

Abstract

Tetanurae, the most successful clade of theropod dinosaurs, including modern birds split into three major clades early in their evolutionary history: Megalosauroidea, Coelurosauria, and Allosauroidea. The oldest tetanurans occur in the earliest Middle Jurassic, but the early fossil record of the clade is still poor. Here we report one of the oldest known and most complete pre-Late Jurassic tetanuran, the probable allosauroid Asfaltovenator vialidadi gen. et sp. nov., which has an unusual character combination, uniting features currently considered to be apomorphic of different tetanuran lineages. A phylogenetic analysis resulted in a monophyletic Carnosauria (Allosauroidea + Megalosauroidea), and the inclusion of the new taxon significantly changes topology within carnosaurs. The analysis shows concentrated homoplasy in proximal nodes at the base of Tetanurae, and a temporal peak at the Pliensbachian-Toarcian extinction event, recently identified as a potential driver of tetanuran radiation. These results highlight the complex morphological evolution in the early radiation of tetanuran theropods, in which convergences and parallelisms were extremely common. This pattern seems to be a common feature in rapid radiation events of major clades of vertebrates and might explain the common difficulties to unravel phylogenetic relationships of important lineages at the base of major clades.


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Article DOI: 10.1038/s41598-019-53672-7

Project DOI: 10.7934/P3267, http://dx.doi.org/10.7934/P3267
This project containsMatrices
  • 1 Media
  • 1 Matrix
  • 69 Taxa
  • 1 Specimen
  • 355 Characters
Total size of project's media files: 1.11M

Download Project SDD File
Total scored cells: 10694
Total media associated with cells: 0
Total labels associated with cell media: 0
Characters
Total characters: 355
Total characters with associated media: 0
Total characters with media with labels: 0
Total character states: 979
Total character states with associated media: 0
Total character states with media with labels:0
Total unordered/ordered characters:325/30
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MorphoBank Project 3267

    Authors' Institutions

    • Museo Paleontológico Egidio Feruglio

    • Ludwig-Maximilians-Universitaet Muenchen

    • Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET)

    • Bayerische Staatssammlung fuer Palaeontologie und Geologie



    Members

    member name taxa specimens media chars character
    media
    labels
    cell scorings
    (scored, NPA, "-")
    cell
    medialabels
    rules
    Oliver Rauhut
    Project Administrator
    Last logged in 12/12/19
    69113550010694
    (10620, 0, 74)
    000


    Taxonomic Overview for Matrix 'M26383' (68 Taxa)

    taxon unscored
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    scored
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    "-" cellscell images labels on
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    [1] Eoraptor
    Last Modified in 12/12/19
    7627327306001
    [2] Herrerasaurus
    Last Modified in 12/12/19
    3631331207001
    [3] Acrocanthosaurus
    Last Modified in 12/12/19
    3232732300001
    [4] Aerosteon
    Last Modified in 12/12/19
    24610910801001
    [5] Afrovenator
    Last Modified in 12/12/19
    14621220801001
    [6] Allosaurus
    Last Modified in 12/12/19
    235735201001
    [7] Angaturama
    Last Modified in 12/12/19
    338161601001
    [8] Asfaltovenator
    Last Modified in 12/12/19
    10325325101001
    [9] Australovenator
    Last Modified in 12/12/19
    276797900001
    [10] Baryonyx
    Last Modified in 12/12/19
    14121621301001
    [11] Carcharodontosaurus
    Last Modified in 12/12/19
    23112512301001
    [12] Ceratosaurus
    Last Modified in 12/12/19
    2832632304001
    [13] Chilantaisaurus
    Last Modified in 12/12/19
    315404000001
    [14] Chuandongocoelurus
    Last Modified in 12/12/19
    299565600001
    [15] "Coelophysis bauri"
    Last Modified in 12/12/19
    5630229702001
    [16] "Coelophysis rhodesiensis"
    Last Modified in 12/12/19
    2333333002001
    [17] Coelurus
    Last Modified in 12/12/19
    24611010801001
    [18] Compsognathus
    Last Modified in 12/12/19
    17118518202001
    [19] Concavenator
    Last Modified in 12/12/19
    22812912700001
    [20] Condorraptor
    Last Modified in 12/12/19
    272838300001
    [21] Cryolophosaurus
    Last Modified in 12/12/19
    20015415302001
    [22] CV00214
    Last Modified in 12/12/19
    263969200001
    [23] Sinosaurus
    Last Modified in 12/12/19
    12922822501001
    [24] Dilophosaurus
    Last Modified in 12/12/19
    3432031803001
    [25] Dubreuillosaurus
    Last Modified in 12/12/19
    22912512501001
    [26] Duriavenator
    Last Modified in 12/12/19
    314414100001
    [27] Elaphrosaurus
    Last Modified in 12/12/19
    22712912701001
    [28] Eoabelisaurus
    Last Modified in 12/12/19
    12922722204001
    [29] Eocarcharia
    Last Modified in 12/12/19
    313424200001
    [30] Eustreptospondylus
    Last Modified in 12/12/19
    12622722702001
    [31] Fukuiraptor
    Last Modified in 12/12/19
    283737200001
    [32] Giganotosaurus
    Last Modified in 12/12/19
    15420220100001
    [33] Guanlong
    Last Modified in 12/12/19
    9926025600001
    [34] Ichthyovenator
    Last Modified in 12/12/19
    262969300001
    [35] Irritator
    Last Modified in 12/12/19
    269828204001
    [36] Leshansaurus
    Last Modified in 12/12/19
    263949200001
    [37] Lourinhanosaurus
    Last Modified in 12/12/19
    280757500001
    [38] Magnosaurus
    Last Modified in 12/12/19
    314424100001
    [39] Majungasaurus
    Last Modified in 12/12/19
    5629729504001
    [40] Mapusaurus
    Last Modified in 12/12/19
    16619118900001
    [41] Marshosaurus
    Last Modified in 12/12/19
    16319319200001
    [42] Masiakasaurus
    Last Modified in 12/12/19
    10824424205001
    [43] Megalosaurus
    Last Modified in 12/12/19
    19715915800001
    [44] Megaraptor
    Last Modified in 12/12/19
    302535300001
    [45] Metriacanthosaurus
    Last Modified in 12/12/19
    288676700001
    [46] Monolophosaurus
    Last Modified in 12/12/19
    15120820400001
    [47] Neovenator
    Last Modified in 12/12/19
    16219519300001
    [48] Ornitholestes
    Last Modified in 12/12/19
    12623022702001
    [49] Piatnitzkysaurus
    Last Modified in 12/12/19
    14820920700001
    [50] Piveteausaurus
    Last Modified in 12/12/19
    328272601001
    [51] Poekilopleuron
    Last Modified in 12/12/19
    309464600001
    [52] Proceratosaurus
    Last Modified in 12/12/19
    257979701001
    [53] Saurophaganax
    Last Modified in 12/12/19
    283737101001
    [54] Shaochilong
    Last Modified in 12/12/19
    314424100001
    [55] Shidaisaurus
    Last Modified in 12/12/19
    291666400001
    [56] Siamotyrannus
    Last Modified in 12/12/19
    301555400001
    [57] "Sinraptor dongi"
    Last Modified in 12/12/19
    4031531500001
    [58] Spinosaurus
    Last Modified in 12/12/19
    277767503001
    [59] Streptospondylus
    Last Modified in 12/12/19
    309474600001
    [60] Suchomimus
    Last Modified in 12/12/19
    16718918701001
    [61] "S zigongensis"
    Last Modified in 12/12/19
    22213613300001
    [62] Torvosaurus
    Last Modified in 12/12/19
    9726225602001
    [63] Tyrannotitan
    Last Modified in 12/12/19
    283737200001
    [64] Wiehenvenator
    Last Modified in 12/12/19
    279747402001
    [65] Xuanhanosaurus
    Last Modified in 12/12/19
    311444400001
    [66] "Yangchuano hepingensis"
    Last Modified in 12/12/19
    12523223000001
    [67] "Yangchuano shangyuensis"
    Last Modified in 12/12/19
    15520420000001
    [68] Zuolong
    Last Modified in 12/12/19
    19715915503001


    Project views

    type number of views Individual items viewed (where applicable)
    Total project views1116
    Project overview161
    Matrix views112Asfaltovenator matrix (15 views); Matrix landing page (97 views);
    Media views209Media search (181 views); M682129 (28 views);
    Bibliography33
    Views for media list51
    Specimen list86
    Taxon list464




    Project downloads

    type number of downloads Individual items downloaded (where applicable)
    Total downloads from project27
    Project downloads21
    Matrix downloads6Asfaltovenator matrix (6 downloads);