Project 708: Nair, J. P. and S. W. Salisbury. 2012. New anatomical information on Rhoetosaurus brownei Longman, 1926, a gravisaurian sauropodomorph dinosaur from the Middle Jurassic of Queensland, Australia. Journal of Vertebrate Paleontology. 32 (2):369-394.
Specimen: † Rhoetosaurus brownei (QM:F1659)

Abstract

Rhoetosaurus brownei is the only known named pre-Cretaceous sauropod from Australia. It is therefore a potentially important taxon for understanding global paleobiogeographic and phylogenetic patterns among early sauropods. Despite its obvious significance, Rhoetosaurus has been too poorly understood to be included in most recent analyses of early sauropod evolution. With this in mind, we evaluated the osteology and phylogeny of undescribed materials of Rhoetosaurus, in order to attempt to close the gap in this understanding. The lower hind limb of Rhoetosaurus highlights a plethora of differences from other sauropods, supporting the distinctiveness of Rhoetosaurus even in the absence of other materials. Some unique traits include prominent crests and sulci on the tibia medially, a narrow metatarsal articular bridge, and pedal claws with an accessory groove or fossa. The pes plesiomorphically retains four claws where most sauropods have three, and bears superficial similarity to that of Shunosaurus. Preliminary cladistic analysis confirms that Rhoetosaurus is a non-neosauropod gravisaurian, although weak support for the most parsimonious topology suggests further findings are required to improve upon incompleteness in the character data. Examination of alternative phylogenetic hypotheses rules out a close relationship between Rhoetosaurus and East Asian Jurassic sauropods, and indicates a closer examination of the potential relationships between Rhoetosaurus and other contemporaneous Middle Jurassic Gondwanan sauropods is necessary.


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Project DOI: 10.7934/P708, http://dx.doi.org/10.7934/P708
This project containsMatrices
  • 1 Media
  • 1 Matrix
  • 1 Document
  • 33 Taxa
  • 1 Specimen
  • 333 Characters
Total size of project's media files: 3 MB

Download Project SDD File
Total scored cells: 6019
Total media associated with cells: 0
Total labels associated with cell media: 0
Characters
Total characters: 333
Total characters with associated media: 0
Total characters with media with labels: 0
Total character states: 753
Total character states with associated media: 0
Total character states with media with labels:0
Total unordered/ordered characters:333/0
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MorphoBank Project 708


    Members

    member name taxa specimens media chars character
    media
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    cell scorings
    (scored, NPA, "-")
    cell
    medialabels
    rules
    MorphoBank Curator
    Project Administrator
    Last logged in 05/13/12
    3311333006019
    (5986, 0, 33)
    000
    Maureen Admin
    Full membership
    Last logged in 04/16/12
    0000000
    (0, 0, 0)
    000
    Jay Nair
    Full membership
    Last logged in 04/14/12
    0000000
    (0, 0, 0)
    000


    Taxonomic Overview for Matrix 'M1625' (32 Taxa)

    taxon unscored
    cells
    scored
    cells
    no cell
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    NPA
    cells
    "-" cellscell images labels on
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    member
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    [1] † Theropoda
    Last Modified in 12/05/13
    033232904003
    [2] † Vulcanodon
    Last Modified in 12/05/13
    23210110100003
    [3] † Tazoudasaurus
    Last Modified in 12/05/13
    14718317703003
    [4] † Spinophorosaurus
    Last Modified in 12/05/13
    17615615501003
    [5] † Shunosaurus
    Last Modified in 12/05/13
    2131231100003
    [6] † Barapasaurus
    Last Modified in 12/05/13
    17515815800003
    [7] † Omeisaurus
    Last Modified in 12/05/13
    3130630100003
    [8] † Patagosaurus
    Last Modified in 12/05/13
    16716716600003
    [9] † Rhoetosaurus
    Last Modified in 12/05/13
    247878600003
    [10] † Mamenchisaurus
    Last Modified in 12/05/13
    7825625401003
    [11] † Losillasaurus
    Last Modified in 12/05/13
    268656500003
    [12] † Apatosaurus
    Last Modified in 12/05/13
    2231331100003
    [13] † Barosaurus
    Last Modified in 12/05/13
    21312012000003
    [14] † Brachiosaurus
    Last Modified in 12/05/13
    1332032000003
    [15] † Camarasaurus
    Last Modified in 12/05/13
    133333200003
    [16] † Dicraeosaurus
    Last Modified in 12/05/13
    8325925000003
    [17] † Suuwassea
    Last Modified in 12/05/13
    20413112900003
    [18] † Diplodocus
    Last Modified in 12/05/13
    1931731400003
    [19] † Haplocanthosaurus
    Last Modified in 12/05/13
    19414113900003
    [20] † Amargasaurus
    Last Modified in 12/05/13
    21511711701003
    [21] † Euhelopus
    Last Modified in 12/05/13
    15617717700003
    [22] † Jobaria
    Last Modified in 12/05/13
    10323023000003
    [23] † Malawisaurus
    Last Modified in 12/05/13
    17715615600003
    [24] † Nigersaurus
    Last Modified in 12/05/13
    257696907003
    [25] † Limaysaurus
    Last Modified in 12/05/13
    14218418308003
    [26] † Rebbachisaurus
    Last Modified in 12/05/13
    300333300003
    [27] † Alamosaurus
    Last Modified in 12/05/13
    18514514503003
    [28] † Nemegtosaurus
    Last Modified in 12/05/13
    241919101003
    [29] † Opisthocoelicaudia
    Last Modified in 12/05/13
    13019919904003
    [30] † Rapetosaurus
    Last Modified in 12/05/13
    9723623600003
    [31] † Saltasaurus
    Last Modified in 12/05/13
    15917417400003
    [32] † Isisaurus
    Last Modified in 12/05/13
    21511811800003


    Project views

    type number of views Individual items viewed (where applicable)
    Total project views19178
    Media views3653Media search (3173 views); M107296 (480 views);
    Project overview2394
    Matrix views1543Matrix landing page (1364 views); Rhoetosaurus (179 views);
    Specimen list1718
    Documents list1330
    Bibliography760
    Taxon list7780




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    type number of downloads Individual items downloaded (where applicable)
    Total downloads from project195
    Media downloads1M107296 (1 download);
    Project downloads191
    Matrix downloads3Rhoetosaurus (3 downloads);