SMALL HADROSAUR MANUS AND PES TRACKS FROM THE LOWER CANTWELL FORMATION (UPPER CRETACEOUS) DENALI NATIONAL PARK, ALASKA: IMPLICATIONS FOR LOCOMOTION IN JUVENILE HADROSAURS
| Autor: | Anthony R. Fiorillo, Ronald S. Tykoski |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
010506 paleontology
biology National park Manus Paleontology Body size 010502 geochemistry & geophysics biology.organism_classification 01 natural sciences Cretaceous Juvenile Skeletal anatomy Ecology Evolution Behavior and Systematics Geology Hadrosaurid 0105 earth and related environmental sciences |
| Zdroj: | PALAIOS. 31:479-482 |
| ISSN: | 0883-1351 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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