A procolophonid (Parareptilia) from the Owl Rock Member, Chinle Formation of Utah, USA

Nicholas C. Fraser, Randall B. Irmis, David K Elliott

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An isolated skull of a procolophonid is described from the Owl Rock Member of the Chinle Formation in the Abajo Mountains of southeast Utah. Although poorly preserved, this specimen exhibits features that demonstrate a phylogenetic relationship with leptopleuronine procolophonids. These include the dentition, the greatly expanded orbitotemporal opening, the prominent quadratojugal spikes, and the shape of the jugal.

Original languageEnglish (US)
JournalPalaeontologia Electronica
Issue number1
StatePublished - 2005



  • Chinle Formation
  • Late Triassic
  • Parareptilia
  • Procolophonidae

ASJC Scopus subject areas

  • Palaeontology

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