Project 205: S. J. Nesbitt, N. D. Smith, R. B. Irmis, A. H. Turner, A. Downs, M. A. Norell. 2009. A Complete Skeleton of a Late Triassic Saurischian and the Early Evolution of Dinosaurs. Science. 326 (5959):1530-1533.
Specimen: † Tawa hallae (unvouchered)

Abstract

Characterizing the evolutionary history of early dinosaurs is central to understanding their rise and diversification in the Late Triassic. However, fossils from basal lineages are rare. A new theropod dinosaur from New Mexico is a representative of the early North American diversification. Known from several nearly complete skeletons, it reveals a mosaic of plesiomorphic and derived features that clarify early saurischian dinosaur evolution and provide evidence for the antiquity of novel avian character systems including skeletal pneumaticity. The taxon further reveals latitudinal differences among saurischian assemblages during the Late Triassic, demonstrates that the theropod fauna from the Late Triassic of North America was not endemic, and suggests that intercontinental dispersal was prevalent during this time.


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Project DOI: 10.7934/P205, http://dx.doi.org/10.7934/P205
This project containsMatrices
  • 1 Media
  • 1 Matrix
  • 81 Taxa
  • 1 Specimen
  • 315 Characters


Download Project SDD File
Total scored cells: 8042
Total media associated with cells: 0
Total labels associated with cell media: 0
Characters
Total characters: 315
Total characters with associated media: 0
Total characters with media with labels: 0
Total character states: 690
Total character states with associated media: 0
Total character states with media with labels:0
Total unordered/ordered characters:315/0
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MorphoBank Project 205

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    member name taxa specimens media chars character
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    media
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    cell scorings
    (scored, NPA, "-")
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    medialabels
    rules
    Sterling Nesbitt
    Project Administrator
    Last logged in 05/12/10
    81003150008042
    (8023, 0, 19)
    000
    Randall Irmis
    Full membership
    Last logged in 06/29/08
    00000000
    (0, 0, 0)
    000
    Mark Norell
    Full membership
    Last logged in Never
    00000000
    (0, 0, 0)
    000
    Nathan Smith
    Full membership
    Last logged in 07/27/09
    00000000
    (0, 0, 0)
    000
    Alan Turner
    Full membership
    Last logged in 02/16/11
    00000000
    (0, 0, 0)
    000


    Taxonomic Overview for Matrix 'M574' (41 Taxa)

    taxon unscored
    cells
    scored
    cells
    no cell
    support
    NPA
    cells
    "-" cellscell images labels on
    cell images
    member
    access
    [1] † Erythrosuchus africanus
    Last Modified in 12/05/13
    3128328301005
    [2] † Euparkeria capensis
    Last Modified in 12/05/13
    1130430301005
    [3] † Revueltosaurus callenderi
    Last Modified in 12/05/13
    2928528501005
    [4] † Aetosaurus ferratus
    Last Modified in 12/05/13
    10421121001005
    [5] † Arizonasaurus babbitti
    Last Modified in 12/05/13
    13118418300005
    [6] † Effigia okeeffeae
    Last Modified in 12/05/13
    7124024004005
    [7] † Batrachotomus kuperferzellensis
    Last Modified in 12/05/13
    4427026801005
    [8] † Postosuchus kirkpatricki
    Last Modified in 12/05/13
    5026426401005
    [9] † Dromicosuchus grallator
    Last Modified in 12/05/13
    9721621502005
    [10] † Eudimorphodon ranzii
    Last Modified in 12/05/13
    15815615601005
    [11] † Dimorphodon macronyx
    Last Modified in 12/05/13
    13817617601005
    [12] † Lagerpeton chanarensis
    Last Modified in 12/05/13
    19511911901005
    [13] † Dromomeron romeri
    Last Modified in 12/05/13
    257575701005
    [14] † Dromomeron gregorii
    Last Modified in 12/05/13
    274404001005
    [15] † Marasuchus lilloensis
    Last Modified in 12/05/13
    14417117100005
    [16] † Eucoelophysis baldwini
    Last Modified in 12/05/13
    288272700005
    [17] † Sacisaurus agudoensis
    Last Modified in 12/05/13
    236797900005
    [18] † Silesaurus opolensis
    Last Modified in 12/05/13
    5126526300005
    [19] † Eocursor parvus
    Last Modified in 12/05/13
    19512012000005
    [20] † Pisanosaurus mertii
    Last Modified in 12/05/13
    235808000005
    [21] † Heterodontosaurus tucki
    Last Modified in 12/05/13
    5226426300005
    [22] † Lesothosaurus dianosticus
    Last Modified in 12/05/13
    6325225200005
    [23] † Scutellosaurus lawleri
    Last Modified in 12/05/13
    16415215000005
    [24] † Saturnalia tupiniquim
    Last Modified in 12/05/13
    14417117100005
    [25] † Plateosaurus engelhardti
    Last Modified in 12/05/13
    1729829800005
    [26] † Efraasia minor
    Last Modified in 12/05/13
    5625925900005
    [27] † Herrerasaurus ischigualastensis
    Last Modified in 12/05/13
    3827727600005
    [28] † Staurikosaurus pricei
    Last Modified in 12/05/13
    20311211200005
    [29] Chindesaurus
    Last Modified in 12/05/13
    251646400005
    [30] † Eoraptor lunensis
    Last Modified in 12/05/13
    9322221900005
    [31] † Tawa hallae
    Last Modified in 12/05/13
    4527027000005
    [32] † Coelophysis bauri
    Last Modified in 12/05/13
    2728828800005
    [33] † 'Syntarsus' kayentakatae
    Last Modified in 12/05/13
    8423123100005
    [34] † Liliensternus liliensterni
    Last Modified in 12/05/13
    13717817800005
    [35] † Zupaysaurus rougieri
    Last Modified in 12/05/13
    228878700005
    [36] † Dilophosaurus wetherelli
    Last Modified in 12/05/13
    4726826700005
    [37] † Cryolophosaurus ellioti
    Last Modified in 12/05/13
    19811611601005
    [38] † Ceratosaurus nasicornis
    Last Modified in 12/05/13
    6824724700005
    [39] † Piatnitzkysaurus floresi
    Last Modified in 12/05/13
    15316116101005
    [40] † Allosaurus fragilis
    Last Modified in 12/05/13
    2129429400005
    [41] † Velociraptor mongoliensis
    Last Modified in 12/05/13
    5026526500005


    Project views

    type number of views Individual items viewed (where applicable)
    Total project views17876
    Project overview2111
    Matrix views1281Matrix landing page (1072 views); The relationships of the earliest dinosaurs (209 views);
    Taxon list9466
    Media views3290Media search (2778 views); M85692 (512 views);
    Specimen list1728




    Project downloads

    type number of downloads Individual items downloaded (where applicable)
    Total downloads from project208
    Matrix downloads18The relationships of the earliest dinosaurs (18 downloads);
    Project downloads190