Project 489: Ksepka, D.T., and M.A. Norell. 2010. The Illusory Evidence for Asian Brachiosauridae: New Material of Erketu ellisoni and a Phylogenetic Reappraisal of Basal Titanosauriformes. American Museum Novitates. 3700:1-27.
Specimen: Erketu ellisoni (IGM/100:IGM 1803)
View: Lateral

Abstract

Phylogenetic relationships among the diverse Cretaceous sauropods of East Asia have
long been controversial. Debate has centered on whether there is any evidence for an endemic
clade of Asian species (“Euhelopodidae”) and on the placement of these taxa within the context
of higher sauropod phylogeny. While most Cretaceous sauropod taxa from Asia are recognized
as part of Somphospondyli, recent discoveries have suggested Brachiosauridae may
have dispersed into Asia as well. We present new fossils and analyses bearing on these issues.
Additional material of the holotype individual of Erketu ellisoni recovered on a subsequent
visit to the type locality expands the character data available for this unique sauropod. Associated
sauropod dorsal and caudal vertebrae were collected from the same horizon, at a location
approximately 2 km from the holotype excavation. !e dorsal vertebra exhibits synapomorphies
suggesting a representative of Titanosauria co-occurred with Erketu ellisoni. !ese new
specimens, as well as recent discoveries of contemporary Asian sauropod taxa, allow a basis
for phylogenetic reappraisal of Erketu and related taxa. Phylogenetic results support a sister
group relationship between the Asian Cretaceous sauropods Erketu and Qiaowanlong. Although
Qiaowanlong was described as a brachiosaurid, it joins Erketu on the somphospondylian side
of the Brachiosauridae-Somphospondyli divergence, erasing the evidence for the dispersal of
Brachiosauridae into Asia.


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Project DOI: 10.7934/P489, http://dx.doi.org/10.7934/P489
This project containsMatrices
  • 2 Media
  • 1 Matrix
  • 46 Taxa
  • 2 Specimens
  • 243 Characters
Total size of project's media files: 1 MB

Download Project SDD File
Total scored cells: 9707
Total media associated with cells: 0
Total labels associated with cell media: 0
Characters
Total characters: 243
Total characters with associated media: 0
Total characters with media with labels: 0
Total character states: 522
Total character states with associated media: 0
Total character states with media with labels:0
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MorphoBank Project 489


    Members

    member name taxa specimens media chars character
    media
    labels
    cell scorings
    (scored, NPA, "-")
    cell
    medialabels
    rules
    Daniel Ksepka
    Project Administrator
    Last logged in 10/28/11
    4620243009707
    (5303, 0, 4404)
    000
    Maureen Admin
    Full membership
    Last logged in 10/11/11
    0000000
    (0, 0, 0)
    000
    Natalie Milbrodt
    Full membership
    Last logged in 10/28/11
    0020000
    (0, 0, 0)
    000


    Taxonomic Overview for Matrix 'M1092' (46 Taxa)

    taxon unscored
    cells
    scored
    cells
    cell
    support
    NPA
    cells
    "-" cellscell images labels on
    cell images
    member
    access
    [1] Theropoda
    Last Modified in 03/29/11
    32270013003
    [2] Prosauropoda
    Last Modified in 03/29/11
    32280012003
    [3] Quiowanlong
    Last Modified in 03/29/11
    21824001003
    [4] Erketu ellisoni
    Last Modified in 10/11/11
    1013000112003
    [5] Euhelopus
    Last Modified in 03/29/11
    1312500105003
    [6] Vulcanodon
    Last Modified in 03/29/11
    58000158003
    [7] Shunosaurus
    Last Modified in 03/29/11
    9225009003
    [8] Barapsaurus
    Last Modified in 03/29/11
    311200128003
    [9] Omeisaurus
    Last Modified in 03/29/11
    42140025003
    [10] Mamenchisaurus
    Last Modified in 03/29/11
    51960043003
    [11] Patagosaurus
    Last Modified in 03/29/11
    711080064003
    [12] Jobaria
    Last Modified in 03/29/11
    132110019003
    [13] Haplocanthosaurus
    Last Modified in 03/29/11
    449600103003
    [14] Nigersaurus
    Last Modified in 03/29/11
    71930079003
    [15] Limaysaurus
    Last Modified in 03/29/11
    51430096003
    [16] Amargasaurus
    Last Modified in 03/29/11
    39000150003
    [17] Brachytrachelopan
    Last Modified in 03/29/11
    53200206003
    [18] Dicraeosaurus
    Last Modified in 03/29/11
    251810037003
    [19] Suuwassea
    Last Modified in 03/29/11
    48600153003
    [20] Diplodocus
    Last Modified in 03/29/11
    32260014003
    [21] Barosaurus
    Last Modified in 03/29/11
    911500119003
    [22] Tornieria
    Last Modified in 03/29/11
    58100157003
    [23] Apatosaurus
    Last Modified in 03/29/11
    62220015003
    [24] Camarasaurus
    Last Modified in 03/29/11
    0240003003
    [25] Brachiosaurus
    Last Modified in 03/29/11
    55500183003
    [26] Giraffatitan
    Last Modified in 03/29/11
    52230015003
    [27] Paluxysaurus
    Last Modified in 03/29/11
    841100049003
    [28] Abysodon
    Last Modified in 03/29/11
    16075008003
    [29] Malawisaurus
    Last Modified in 03/29/11
    411400125003
    [30] Rapetosaurus
    Last Modified in 03/29/11
    71740062003
    [31] Nemegtosaurus
    Last Modified in 03/29/11
    256800150003
    [32] Isisaurus
    Last Modified in 03/29/11
    58400154003
    [33] Alamosaurus
    Last Modified in 03/29/11
    209100132003
    [34] Saltasaurus
    Last Modified in 03/29/11
    412900110003
    [35] Neuquensaurus
    Last Modified in 03/29/11
    511100127003
    [36] Opisthocoelicaudia
    Last Modified in 03/29/11
    51410097003
    [37] Europasaurus
    Last Modified in 03/29/11
    51860052003
    [38] Epachthosaurus
    Last Modified in 03/29/11
    106700166003
    [39] Cetiosaurus
    Last Modified in 03/29/11
    119100141003
    [40] Ferganasaurus
    Last Modified in 03/29/11
    57300165003
    [41] Sonidosaurus
    Last Modified in 03/29/11
    42300216003
    [42] Andesaurus
    Last Modified in 03/29/11
    51700221003
    [43] Cedarosaurus
    Last Modified in 03/29/11
    83100204003
    [44] Gondwanatitan
    Last Modified in 03/29/11
    33700203003
    [45] Bor guve dorsal vertebra
    Last Modified in 03/29/11
    23011002003
    [46] Bor guve caudal vertebrae
    Last Modified in 03/29/11
    2357001003


    Project views

    type number of views Individual items viewed (where applicable)
    Total project views1579
    Project overview115
    Matrix views71Matrix landing page (65 views); Ksepka and Norell 2010 (6 views);
    Media views251Media search (185 views); M68250 (31 views); M68251 (35 views);
    Taxon list717
    Bibliography140
    Specimen list171
    Views for media list114




    Project downloads

    type number of downloads Individual items downloaded (where applicable)
    Total downloads from project2
    Project downloads1
    Matrix downloads1Ksepka and Norell 2010 (1 download);