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
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
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"-" cellscell images labels on
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[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 views1197
Project overview95
Matrix views47Matrix landing page (45 views); Ksepka and Norell 2010 (2 views);
Media views193Media search (143 views); M68250 (22 views); M68251 (28 views);
Taxon list542
Bibliography105
Specimen list124
Views for media list91




Project downloads

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