Journal
ANATOMICAL RECORD-ADVANCES IN INTEGRATIVE ANATOMY AND EVOLUTIONARY BIOLOGY
Volume 295, Issue 4, Pages 610-614Publisher
WILEY
DOI: 10.1002/ar.22428
Keywords
Alaska; dinosaur; Edmontosaurus; histology; migration; overwintering
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Funding
- National Research Foundation of South Africa, University of Cape Town [NRF 449538]
- National Science Foundation [NSF OPP 0424594]
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Recent biomechanical evidence has fuelled debate surrounding the winter habits of the hadrosaurian dinosaur Edmontosaurus (ca. 70 Ma). Using histological characteristics recorded in bone, we show that polar Edmontosaurus endured the long winter night. In contrast, the bone microstructure of temperate Edmontosaurus is inconsistent with a perennially harsh environment. Differences in the bone microstructure of polar and temperate Edmontosaurus consequently dispute the hypothesis that polar populations were migratory. The overwintering signal preserved in the microstructure of polar Edmontosaurus bone offers significant insight into the life history of dinosaurs within the Late Cretaceous Arctic. Anat Rec, 295: 610-614, 2012. (C) 2012 Wiley Periodicals, Inc.
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