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"Saurornitholestes" robustus is a troodontid (Dinosauria, Theropoda)

David C. Evans, Derek W. Larson, Thomas M. Cullen and Robert M. Sullivan
"Saurornitholestes" robustus is a troodontid (Dinosauria, Theropoda)
Canadian Journal of Earth Sciences = Revue Canadienne des Sciences de la Terre (July 2014) 51 (7): 730-734


The holotype of Saurornitholestes robustus (SMP VP-1955) from the upper Kirtland Formation (De-na-zin Member), originally identified as a dromaeosaurid, is here re-identified as an indeterminate troodontid theropod. The frontal has no diagnostic dromaeosaurid characters, but is shown to have several features unique to troodontids among deinonychosaurs, including the shallow lateral wall defining the fossae for the olfactory system, the exclusion of the supratemporal fossa from the dorsal surface of the frontal, and a raised orbital rim. The size and morphology of SMP VP-1955 is also consistent with better-known troodontid material from the late Campanian of Alberta, and as preserved, the Kirtland specimen is indistinguishable from comparable Alberta material. The revised identification of SMP VP-1955 provides the first non-dental skeletal record of a troodontid from the Kirtland Formation, and a rare record of this clade from the Kirtlandian land-vertebrate age.

ISSN: 0008-4077
EISSN: 1480-3313
Serial Title: Canadian Journal of Earth Sciences = Revue Canadienne des Sciences de la Terre
Serial Volume: 51
Serial Issue: 7
Title: "Saurornitholestes" robustus is a troodontid (Dinosauria, Theropoda)
Affiliation: Royal Ontario Museum, Department of Natural History, Toronto, ON, Canada
Pages: 730-734
Published: 201407
Text Language: English
Publisher: National Research Council of Canada, Ottawa, ON, Canada
References: 42
Accession Number: 2014-058235
Categories: Vertebrate paleontology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. 1 table
N31°30'00" - N37°00'00", W109°04'60" - W103°00'00"
Secondary Affiliation: University of Toronto, CAN, CanadaNew Mexico Museum of Natural History and Science, USA, United States
Country of Publication: Canada
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data from Canadian Science Publishing, NRC Research Press, Ottawa, ON, Canada. Reference includes data from GeoScienceWorld, Alexandria, VA, United States
Update Code: 201431
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