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Histologic growth dynamic study of Edmontosaurus regalis (Dinosauria, Hadrosauridae) from a bonebed assemblage of the Upper Cretaceous Horseshoe Canyon Formation, Edmonton, Alberta, Canada

Evan Vanderven, Michael E. Burns and Philip J. Currie
Histologic growth dynamic study of Edmontosaurus regalis (Dinosauria, Hadrosauridae) from a bonebed assemblage of the Upper Cretaceous Horseshoe Canyon Formation, Edmonton, Alberta, Canada (in The Danek Edmontosaurus bonebed; new insights on the systematics, biogeography, and palaeoecology of Late Cretaceous dinosaur communities, Michael E. Burns (organizer), Philip J. Currie (organizer), Eva B. Koppelhus (organizer), Victoria M. Arbour (editor), Andrew A. Farke (editor) and Michael J. Ryan (editor))
Canadian Journal of Earth Sciences = Revue Canadienne des Sciences de la Terre (November 2014) 51 (11): 1023-1033

Abstract

The Danek Bonebed (Edmonton, Alberta, Canada) is a monodominant Edmontosaurus regalis assemblage of the upper Campanian (Upper Cretaceous) Horseshoe Canyon Formation. Bone histology of humeri and femora are used in this paper to test hypotheses about the growth dynamics and palaeobiology of Edmontosaurus. The high number of elements collected from the Danek Bonebed allow for an expansion of the multi-element histological record for hadrosaurs. Results indicate that Edmontosaurus had a growth trajectory similar to other large-bodied dinosaurs and reached the onset of somatic maturity at about 10-15 years of age; however, even the largest elements to preserve lines of arrested growth do not have external fundamental systems. This timing of the onset of somatic maturity agrees with the estimated body size of Edmontosaurus relative to other dinosaurs for which life-history data are available. Vascularity patterns support the hypothesis that edmontosaurs preserved at the Danek Bonebed were not subject to the same extreme seasonal environmental shifts as congenerics preserved at higher latitudes, further supporting overwintering behaviour in the latter.


ISSN: 0008-4077
EISSN: 1480-3313
Coden: CJESAP
Serial Title: Canadian Journal of Earth Sciences = Revue Canadienne des Sciences de la Terre
Serial Volume: 51
Serial Issue: 11
Title: Histologic growth dynamic study of Edmontosaurus regalis (Dinosauria, Hadrosauridae) from a bonebed assemblage of the Upper Cretaceous Horseshoe Canyon Formation, Edmonton, Alberta, Canada
Title: The Danek Edmontosaurus bonebed; new insights on the systematics, biogeography, and palaeoecology of Late Cretaceous dinosaur communities
Author(s): Vanderven, EvanBurns, Michael E.Currie, Philip J.
Author(s): Burns, Michael E.organizer
Author(s): Currie, Philip J.organizer
Author(s): Koppelhus, Eva B.organizer
Author(s): Arbour, Victoria M.editor
Author(s): Farke, Andrew A.editor
Author(s): Ryan, Michael J.editor
Affiliation: University of Alberta, Department of Biological Sciences, Edmonton, AB, Canada
Affiliation: University of Alberta, Department of Biological Sciences, Edmonton, AB, Canada
Pages: 1023-1033
Published: 201411
Text Language: English
Summary Language: French
Publisher: National Research Council of Canada, Ottawa, ON, Canada
References: 40
Accession Number: 2015-007764
Categories: Vertebrate paleontology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. 4 tables
N53°34'00" - N53°34'00", W113°25'00" - W113°25'00"
Secondary Affiliation: Raymond M. Alf Museum of Paleontology, USA, United StatesCleveland Museum of Natural History, USA, United States
Country of Publication: Canada
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute.
Update Code: 201504
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