Project 3934: M. B. von Baczko, J. B. Desojo, D. Ponce. 2019. Postcranial anatomy and osteoderm histology of Riojasuchus tenuisceps and a phylogenetic update on Ornithosuchidae (Archosauria, Pseudosuchia). Journal of Vertebrate Paleontology. 39 (5):e1693396.
Specimen: † Riojasuchus tenuisceps (Instituto Miguel Lillo, Tucumán/PVL:3827)
View: fossil skull

Abstract

Ornithosuchidae is a group of terrestrial quadrupedal pseudosuchian archosaurs from the Late Triassic of South America and Europe. Riojasuchus tenuisceps is arguably one of the best representative species of this clade because it comprises very well-preserved three-dimensional, almost complete skeletons. However, R. tenuisceps was originally described 50 years ago and compared then only with Ornithosuchus woodwardi and their affinities were discussed in detail. Here, we provide a detailed description of the postcranial skeleton of R. tenuisceps, which exhibits several remarkable features within pseudosuchians. When a wide spectrum of pseudosuchian archosaurs are considered, the alleged character that linked ornithosuchids with dinosaurs resulted in convergences and some were registered in other pseudosuchian groups as well. Riojasuchus tenuisceps also provided crucial information about the ‘crocodile-reversed’ tarsus, which is a unique feature of ornithosuchids, but it is not completely preserved in O. woodwardi and it is unknown in Venaticosuchus rusconii. In addition, the first histological analysis of cervical and dorsal osteoderms of R. tenuisceps was carried out as well, in order to test the utility of these structures as skeletochronological tools. Finally, the phylogenetic context of Ornithosuchidae is discussed based on the latest phylogenetic studies, which show a close affinity with Erpetosuchidae.


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Article DOI: 10.1080/02724634.2019.1693396

Project DOI: 10.7934/P3934, http://dx.doi.org/10.7934/P3934
This project containsMatrices
  • 1 Media
  • 1 Matrix
  • 2 Documents
  • 85 Taxa
  • 1 Specimen
  • 418 Characters
Total size of project's media files: 3.76M

Download Project SDD File
Total scored cells: 20418
Total media associated with cells: 0
Total labels associated with cell media: 0
Characters
Total characters: 418
Total characters with associated media: 0
Total characters with media with labels: 0
Total character states: 908
Total character states with associated media: 0
Total character states with media with labels:0
Total unordered/ordered characters:0/418
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MorphoBank Project 3934

    Authors' Institutions

    • Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET)

    • Museo de La Plata

    • Universidad Nacional de Rio Negro

    • Museo 'Carlos Ameghino'



    Members

    member name taxa specimens media chars character
    media
    labels
    cell scorings
    (scored, NPA, "-")
    cell
    medialabels
    rules
    MorphoBank Curator
    Project Administrator
    85114180020418
    (20418, 0, 0)
    000
    Belen von Baczko
    Full membership
    0000000
    (0, 0, 0)
    000


    Taxonomic Overview for Matrix 'M27240' (85 Taxa)

    taxon unscored
    cells
    scored
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    [1] † Mesosuchus browni
    Last Modified in 02/18/21
    8733133100002
    [2] † Prolacerta broomi
    Last Modified in 02/18/21
    5935935900002
    [3] † Proterosuchus fergusi
    Last Modified in 02/18/21
    5136736700002
    [4] † Erythrosuchus africanus
    Last Modified in 02/18/21
    5236636600002
    [5] † Vancleavea campi
    Last Modified in 02/18/21
    13128728700002
    [6] † Chanaresuchus bonapartei
    Last Modified in 02/18/21
    5436536400002
    [7] † Tropidosuchus romeri
    Last Modified in 02/18/21
    10331631500002
    [8] † Euparkeria capensis
    Last Modified in 02/18/21
    1940039900002
    [9] † Parasuchus hislopi
    Last Modified in 02/18/21
    6635235200002
    [10] † Smilosuchus gregorii
    Last Modified in 02/18/21
    7634234200002
    [11] † Pseudopalatus pristinus
    Last Modified in 02/18/21
    3338538500002
    [12] † Gracilisuchus stipanicicorum
    Last Modified in 02/18/21
    10731631100002
    [13] † Turfanosuchus dabanensis
    Last Modified in 02/18/21
    14727227100002
    [14] † Ornithosuchus longidens
    Last Modified in 02/18/21
    14027827800002
    [15] † Riojasuchus tenuisceps
    Last Modified in 02/18/21
    6135735700002
    [16] † Revueltosaurus callenderi
    Last Modified in 02/18/21
    4637237200002
    [17] † Aetosaurus ferratus
    Last Modified in 02/18/21
    15026926800002
    [18] † Stagonolepis robertsoni
    Last Modified in 02/18/21
    10031831800002
    [19] † Longosuchus meadei
    Last Modified in 02/18/21
    7034834800002
    [20] † Ticinosuchus ferox
    Last Modified in 02/18/21
    20920920900002
    [21] † Qianosuchus mixtus
    Last Modified in 02/18/21
    13228628600002
    [22] † Xilousuchus sapingensis
    Last Modified in 02/18/21
    29812012000002
    [23] † Arizonasaurus babbitti
    Last Modified in 02/18/21
    16125725700002
    [24] † Ctenosauriscus
    Last Modified in 02/18/21
    402161600002
    [25] † Hypselorhachis mirabilis
    Last Modified in 02/18/21
    4135500002
    [26] † Waldshut taxon
    Last Modified in 02/18/21
    400181800002
    [27] † Poposaurus gracilis holotype
    Last Modified in 02/18/21
    380383800002
    [28] † Poposaurus gracilis yale
    Last Modified in 02/18/21
    20521421300002
    [29] † Lotosaurus adentus
    Last Modified in 02/18/21
    10431431400002
    [30] † Sillosuchus longicervix
    Last Modified in 02/18/21
    339797900002
    [31] † Effigia okeeffeae
    Last Modified in 02/18/21
    10031831800002
    [32] † Shuvosaurus inexpectatus
    Last Modified in 02/18/21
    11030830800002
    [33] † Combined prestosuchus
    Last Modified in 02/18/21
    5736136100002
    [34] † Saurosuchus galilei
    Last Modified in 02/18/21
    10331531500002
    [35] † Batrachotomus kuperferzellensis
    Last Modified in 02/18/21
    6435435400002
    [36] † Fasolasuchus tenax
    Last Modified in 02/18/21
    25416416400002
    [37] † Rauisuchus triradentes
    Last Modified in 02/18/21
    28213613600002
    [38] † Polanosuchus silesiacus
    Last Modified in 02/18/21
    29812012000002
    [39] † Postosuchus kirkpatricki
    Last Modified in 02/18/21
    7734134100002
    [40] † Postosuchus alisonae
    Last Modified in 02/18/21
    24817017000002
    [41] † CM 73372
    Last Modified in 02/18/21
    25716116100002
    [42] † Hesperosuchus agilis
    Last Modified in 02/18/21
    20021821800002
    [43] † Dromicosuchus grallator
    Last Modified in 02/18/21
    14627227200002
    [44] † Hesperosuchus agalis
    Last Modified in 02/18/21
    12829029000002
    [45] † Dibothrosuchus elaphros
    Last Modified in 02/18/21
    19921921900002
    [46] † Terrestrisuchus gracilis
    Last Modified in 02/18/21
    9832032000002
    [47] † Sphenosuchus acutus
    Last Modified in 02/18/21
    19921921900002
    [48] † Litargosuchus leptorhynchus
    Last Modified in 02/18/21
    22419419400002
    [49] † Kayentasuchus walkeri
    Last Modified in 02/18/21
    31010810800002
    [50] † Orthosuchus stormbergi
    Last Modified in 02/18/21
    9432432400002
    [51] † Alligator mississippiensis
    Last Modified in 02/18/21
    4737337100002
    [52] † Protosuchus haughtoni
    Last Modified in 02/18/21
    25516316300002
    [53] † Protosuchus richarsoni
    Last Modified in 02/18/21
    5536336300002
    [54] † Eudimorphodon ranzii
    Last Modified in 02/18/21
    22419419400002
    [55] † Dimorphodon macronyx
    Last Modified in 02/18/21
    21420420400002
    [56] † Lagerpeton chanarensis
    Last Modified in 02/18/21
    28513313300002
    [57] † Dromomeron gregorii
    Last Modified in 02/18/21
    376424200002
    [58] † Dromomeron romeri
    Last Modified in 02/18/21
    357616100002
    [59] † Marasuchus lilloensis
    Last Modified in 02/18/21
    21320520500002
    [60] † Asilisaurus kongwe
    Last Modified in 02/18/21
    24217617600002
    [61] † Eucoelophysis baldwini
    Last Modified in 02/18/21
    392262600002
    [62] † Sacisaurus agudoensis
    Last Modified in 02/18/21
    327919100002
    [63] † Lewisuchus pseudolagosuchus
    Last Modified in 02/18/21
    19122722700002
    [64] † Eocursor parvus
    Last Modified in 02/18/21
    27814014000002
    [65] † Silesaurus opolensis
    Last Modified in 02/18/21
    8233733600002
    [66] † Pisanosaurus mertii
    Last Modified in 02/18/21
    330888800002
    [67] † Heterodontosaurus tucki
    Last Modified in 02/18/21
    7434634400002
    [68] † Lesothosaurus dianosticus
    Last Modified in 02/18/21
    8933032900002
    [69] † Scutellosaurus lawleri
    Last Modified in 02/18/21
    25116816700002
    [70] † Herrerasaurus ischigualastensis
    Last Modified in 02/18/21
    7134734700002
    [71] † Staurikosaurus pricei
    Last Modified in 02/18/21
    30211611600002
    [72] † Eoraptor lunensis
    Last Modified in 02/18/21
    13428528400002
    [73] † Saturnalia tupiniquim
    Last Modified in 02/18/21
    22419419400002
    [74] † Plateosaurus engelhardti
    Last Modified in 02/18/21
    3238638600002
    [75] † Efraasia minor
    Last Modified in 02/18/21
    9832032000002
    [76] † Tawa
    Last Modified in 02/18/21
    7234634600002
    [77] † Coelophysis bauri
    Last Modified in 02/18/21
    5436436400002
    [78] † Dilophosaurus wetherelli
    Last Modified in 02/18/21
    7834034000002
    [79] † Allosaurus fragilis
    Last Modified in 02/18/21
    4337537500002
    [80] † Velociraptor mongoliensis
    Last Modified in 02/18/21
    8033933800002
    [81] † Parringtonia gracilis
    Last Modified in 02/18/21
    378404000002
    [82] † Erpetosuchus granti
    Last Modified in 02/18/21
    26115715700002
    [83] † Yonghesuchus sangbiensis
    Last Modified in 02/18/21
    327929100002
    [84] † Venaticosuchus rusconii
    Last Modified in 02/18/21
    348707000002
    [85] † Pagosvenator candelariensis
    Last Modified in 02/18/21
    30611211200002


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    Project overview218
    Matrix views168Modified Lacerda et al. (2018) paper (33 views); Matrix landing page (135 views);
    Media views452Media search (387 views); M739126 (65 views);
    Specimen list237
    Taxon list1452
    Documents list149
    Bibliography96
    Views for media list148




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