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Citation for Study 13241

Citation title: "The anatomy and systematics of Colepiocephale lambei (Dinosauria: Pachycephalosauridae).".

Study name: "The anatomy and systematics of Colepiocephale lambei (Dinosauria: Pachycephalosauridae).".

This study is part of submission 13241 (Status: Published).

Citation

Schott R.K., Evans D.C., Williamson T.E., Carr T.D., & Goodwin M.B. 2009. The anatomy and systematics of Colepiocephale lambei (Dinosauria: Pachycephalosauridae). Journal of Vertebrate Paleontology, 29(3): 771-786.

Authors

• Schott R.K.
• Evans D.C.
• Williamson T.E.
• Carr T.D.
• Goodwin M.B.

Abstract

Colepiocephale lambei from the Foremost Formation of Alberta is a problematic pachycephalosaurid that has recently been hypothesized as (1) synonymous with Stegoceras validum, (2) a distinct species within the Stegoceras clade, and (3) an unusual taxon more derived than Stegoceras. Conflict among these hypotheses arises from different interpretations of the parietosquamosal region of the dome. Re-evaluation of the morphology of C. lambei based on all known material from Alberta indicates that the posteromedial extension of the parietal is broken off at its base in every specimen, and what was interpreted as the posterior margin of the dome actually is the anterior margins of large supratemporal fenestrae. The squamosals are not preserved in any specimen, but the form of the parietal suggests that they were present in the typical pachycephalosaurid configuration. Colepiocephale lambei is considered to be a distinct taxon based on several autapomorphies and stratigraphic segregation from S. validum. Phylogenetic analyses that include new anatomical data confirm that C. lambei occupies a basal position within domed pachycephalosaurids, but its precise systematic position with respect to S. validum remains equivocal. This general interpretation is more consistent with its stratigraphic position as one of the oldest knownmembers of Pachycephalosauridae. Additionally, this study results in the recognition of the firstmaterial referable to this taxon from the Judith River Formation of Montana, which results in a geographic range extension for this taxon and extends its stratigraphic range into the equivalent of the lower Oldman Formation in Alberta.

External links

• DOI: 10.1671/039.029.0329
• Other URL: http://graemetlloyd.com/matr.html

About this resource

• Canonical resource URI: http://purl.org/phylo/treebase/phylows/study/TB2:S13241
• Other versions: Nexus NeXML
• Show BibTeX reference

  		@ARTICLE{TreeBASE2Ref21211,
  	 author = {Ryan K. Schott and David C. Evans and Thomas E. Williamson and Thomas D. Carr and Mark B. Goodwin},
  	 title = {The anatomy and systematics of Colepiocephale lambei (Dinosauria: Pachycephalosauridae).},
  	 year = {2009},
  	 keywords = {},
  	 doi = {10.1671/039.029.0329},
  	 url = {http://graemetlloyd.com/matr.html},
  	 pmid = {},
  	 journal = {Journal of Vertebrate Paleontology},
  	 volume = {29},
  	 number = {3},
  	 pages = {771--786},
  	 abstract = {Colepiocephale lambei from the Foremost Formation of Alberta is a problematic pachycephalosaurid that has recently been hypothesized as (1) synonymous with Stegoceras validum, (2) a distinct species within the Stegoceras clade, and (3) an unusual taxon more derived than Stegoceras. Conflict among these hypotheses arises from different interpretations of the parietosquamosal region of the dome. Re-evaluation of the morphology of C. lambei based on all known material from Alberta indicates that the posteromedial extension of the parietal is broken off at its base in every specimen, and what was interpreted as the posterior margin of the dome actually is the anterior margins of large supratemporal fenestrae. The squamosals are not preserved in any specimen, but the form of the parietal suggests that they were present in the typical pachycephalosaurid configuration. Colepiocephale lambei is considered to be a distinct taxon based on several autapomorphies and stratigraphic segregation from S. validum. Phylogenetic analyses that include new anatomical data confirm that C. lambei occupies a basal position within domed pachycephalosaurids, but its precise systematic position with respect to S. validum remains equivocal. This general interpretation is more consistent with its stratigraphic position as one of the oldest knownmembers of Pachycephalosauridae. Additionally, this study results in the recognition of the firstmaterial referable to this taxon from the Judith River Formation of Montana, which results in a geographic range extension for this taxon and extends its stratigraphic range into the equivalent of the lower Oldman Formation in Alberta.}
  }
  		

• Show RIS reference

  		TY  - JOUR
  ID  - 21211
  AU  - Schott,Ryan K.
  AU  - Evans,David C.
  AU  - Williamson,Thomas E.
  AU  - Carr,Thomas D.
  AU  - Goodwin,Mark B.
  T1  - The anatomy and systematics of Colepiocephale lambei (Dinosauria: Pachycephalosauridae).
  PY  - 2009
  KW  - 
  UR  - http://graemetlloyd.com/matr.html
  N2  - Colepiocephale lambei from the Foremost Formation of Alberta is a problematic pachycephalosaurid that has recently been hypothesized as (1) synonymous with Stegoceras validum, (2) a distinct species within the Stegoceras clade, and (3) an unusual taxon more derived than Stegoceras. Conflict among these hypotheses arises from different interpretations of the parietosquamosal region of the dome. Re-evaluation of the morphology of C. lambei based on all known material from Alberta indicates that the posteromedial extension of the parietal is broken off at its base in every specimen, and what was interpreted as the posterior margin of the dome actually is the anterior margins of large supratemporal fenestrae. The squamosals are not preserved in any specimen, but the form of the parietal suggests that they were present in the typical pachycephalosaurid configuration. Colepiocephale lambei is considered to be a distinct taxon based on several autapomorphies and stratigraphic segregation from S. validum. Phylogenetic analyses that include new anatomical data confirm that C. lambei occupies a basal position within domed pachycephalosaurids, but its precise systematic position with respect to S. validum remains equivocal. This general interpretation is more consistent with its stratigraphic position as one of the oldest knownmembers of Pachycephalosauridae. Additionally, this study results in the recognition of the firstmaterial referable to this taxon from the Judith River Formation of Montana, which results in a geographic range extension for this taxon and extends its stratigraphic range into the equivalent of the lower Oldman Formation in Alberta.
  L3  - 10.1671/039.029.0329
  JF  - Journal of Vertebrate Paleontology
  VL  - 29
  IS  - 3
  SP  - 771
  EP  - 786
  ER  -