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Small hadrosaur manus and pes tracks from the lower Cantwell Formation (Upper Cretaceous) Denali National Park, Alaska; implications for locomotion in juvenile hadrosaurs

Anthony R. Fiorillo and Ronald S. Tykoski
Small hadrosaur manus and pes tracks from the lower Cantwell Formation (Upper Cretaceous) Denali National Park, Alaska; implications for locomotion in juvenile hadrosaurs
Palaios (October 2016) 31 (10): 479-482

Abstract

We report on a paired set of manus and pes tracks from the lower part of the Upper Cretaceous Cantwell Formation in Denali National Park, Alaska, USA. The tridactyl track is bi-lobed in the 'heel' and the morphology allows attribution to a hadrosaurid. While adult hadrosaurs typically reached body lengths of 1200 cm, the length of this Alaskan pes impression is approximately 11 cm, which provides a hip height estimate of approximately 44-45 cm for this trackmaker. The manus impression is approximately 3.6 cm wide and 2.75 cm long. While hypothesized through studies of skeletal anatomy, given the small body size of the hadrosaur that made these tracks, this paired set of impressions indicates that at least some juvenile hadrosaurs were facultative quadrupeds rather than obligatory bipeds.


ISSN: 0883-1351
Serial Title: Palaios
Serial Volume: 31
Serial Issue: 10
Title: Small hadrosaur manus and pes tracks from the lower Cantwell Formation (Upper Cretaceous) Denali National Park, Alaska; implications for locomotion in juvenile hadrosaurs
Affiliation: Perot Museum of Nature and Science, Dallas, TX, United States
Pages: 479-482
Published: 201610
Text Language: English
Publisher: Society for Sedimentary Geology, Tulsa, OK, United States
References: 27
Accession Number: 2016-098993
Categories: Vertebrate paleontology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. sketch map
N62°15'00" - N64°19'60", W153°00'00" - W148°40'00"
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data from GeoScienceWorld, Alexandria, VA, United States. Reference includes data supplied by SEPM (Society for Sedimentary Geology), Tulsa, OK, United States
Update Code: 201648
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