Project 5324: J. A. Whitlock. 2011. A phylogenetic analysis of Diplodocoidea (Saurischia: Sauropoda). Zoological Journal of the Linnean Society. 161 (4):872-915.
Specimen: † Camarasaurus (unvouchered)
View: Part (fossil)

Abstract

Diplodocoidea includes some of the first well-known sauropod dinosaurs, including such late 19th century and early 20th century discoveries as Apatosaurus, Diplodocus, and Dicraeosaurus. As a consequence of their long history of study, the basic set of suprageneric diplodocoid interrelationships is well resolved, and the diagnostic features of each genus are well established. However, intergeneric relationships are less resolved, including the relationships of putatively basal taxa like Amphicoelias and Haplocanthosaurus, the flagellicaudatan Suuwassea, and the highly specialized rebbachisaurids. For the rebbachisaurids, this uncertainty is coupled with a recent surge in the discovery of new taxa. Comparative cladistic methods demonstrate that character and taxon sampling need to be improved before greater phylogenetic resolution can be expected. Here, I present a new phylogenetic analysis that resolves many of the outstanding questions regarding the relationships within Diplodocoidea and examines palaeobiogeographical trends within the group. Suuwassea is recovered as a basal dicraeosaurid (the only Laurasian member of the group), and two distinct clades of rebbachisaurids are identified: a group closely allied with Nigersaurus and a clade associated with Limaysaurus. Amphicoelias, Amazonsaurus, and Haplocanthosaurus are provisionally placed as successively less-derived taxa at the base of Diplodocoidea. A North American origin for Diplodocoidea and Flagellicaudata is hypothesized based on the geographical and temporal distribution of those taxa. Rebbachisaurid taxa demonstrate a South American/African vicariance pattern, but the timing of the event pre-dates the proposed final rifting of those continents by c. 40 million years; the meaning of this discrepancy is uncertain. © 2011 The Linnean Society of London, Zoological Journal of the Linnean Society, 2011, 161, 872–915.


Read the article »

Article DOI: 10.1111/j.1096-3642.2010.00665.x

Project DOI: 10.7934/P5324, http://dx.doi.org/10.7934/P5324
This project containsMatrices
  • 4 Media
  • 1 Matrix
  • 1 Document
  • 26 Taxa
  • 4 Specimens
  • 189 Characters
Total size of project's media files: 11.38M

Download Project SDD File
Total scored cells: 2407
Total media associated with cells: 0
Total labels associated with cell media: 0
Characters
Total characters: 189
Total characters with associated media: 0
Total characters with media with labels: 0
Total character states: 389
Total character states with associated media: 0
Total character states with media with labels:0
Total unordered/ordered characters:189/0
Currently Viewing:
MorphoBank Project 5324
  • Creation Date:
    30 June 2024
  • Publication Date:
    02 July 2024

    Authors' Institutions

    • University of Michigan



    Members

    member name taxa specimens media chars character
    media
    labels
    cell scorings
    (scored, NPA, "-")
    cell
    medialabels
    rules
    Shreya Jariwala
    Project Administrator
    2644189002407
    (2381, 0, 26)
    000


    Taxonomic Overview for Matrix 'M29926' (26 Taxa)

    taxon unscored
    cells
    scored
    cells
    no cell
    support
    NPA
    cells
    "-" cellscell images labels on
    cell images
    member
    access
    [1] † Omeisaurus
    Taxon name last Modified on 06/30/24
    2016616603001
    [2] † Jobaria
    Taxon name last Modified on 06/30/24
    2316216204001
    [3] † Camarasaurus
    Taxon name last Modified on 06/30/24
    118718701001
    [4] † Brachiosaurus
    Taxon name last Modified on 06/30/24
    518218202001
    [5] † Australodocus
    Taxon name last Modified on 06/30/24
    175141400001
    [6] † Losillasaurus
    Taxon name last Modified on 06/30/24
    139505000001
    [7] † Haplocanthosaurus
    Taxon name last Modified on 06/30/24
    95929202001
    [8] † Amphicoelias
    Taxon name last Modified on 06/30/24
    163262600001
    [9] † Dinheirosaurus
    Taxon name last Modified on 06/30/24
    165242400001
    [10] † Amazonsaurus
    Taxon name last Modified on 06/30/24
    159303000001
    [11] † Apatosaurus
    Taxon name last Modified on 06/30/24
    318618600001
    [12] † Barosaurus
    Taxon name last Modified on 06/30/24
    91989800001
    [13] † Diplodocus
    Taxon name last Modified on 06/30/24
    118818800001
    [14] † Supersaurus
    Taxon name last Modified on 06/30/24
    136535300001
    [15] † Tornieria
    Taxon name last Modified on 06/30/24
    103868600001
    [16] † Amargasaurus
    Taxon name last Modified on 06/30/24
    7611311300001
    [17] † Brachytrachelopan
    Taxon name last Modified on 06/30/24
    151383800001
    [18] † Dicraeosaurus
    Taxon name last Modified on 06/30/24
    2816116100001
    [19] † Suuwassea
    Taxon name last Modified on 06/30/24
    101888800001
    [20] † Histriasaurus
    Taxon name last Modified on 06/30/24
    179101000001
    [21] † Rebbachisaurus
    Taxon name last Modified on 06/30/24
    165222202001
    [22] † Limaysaurus
    Taxon name last Modified on 06/30/24
    4414014005001
    [23] † Cathartesaura
    Taxon name last Modified on 06/30/24
    148393902001
    [24] † Zapalasaurus
    Taxon name last Modified on 06/30/24
    150393900001
    [25] † Nigersaurus
    Taxon name last Modified on 06/30/24
    2815615605001
    [26] † Rebbachisaurus spanish sp.
    Taxon name last Modified on 06/30/24
    158313100001