Hadrosaurs Were Perennial Polar Residents
Version of Record online: 17 FEB 2012
Copyright © 2012 Wiley Periodicals, Inc.
The Anatomical Record
Volume 295, Issue 4, pages 610–614, April 2012
How to Cite
Chinsamy, A., Thomas, D. B., Tumarkin-Deratzian, A. R. and Fiorillo, A. R. (2012), Hadrosaurs Were Perennial Polar Residents. Anat Rec, 295: 610–614. doi: 10.1002/ar.22428
- Issue online: 12 MAR 2012
- Version of Record online: 17 FEB 2012
- Manuscript Accepted: 22 DEC 2011
- Manuscript Revised: 2 DEC 2011
- Manuscript Received: 25 MAY 2011
- National Research Foundation of South Africa, University of Cape Town. Grant Number: NRF 449538
- National Science Foundation. Grant Number: NSF OPP 0424594
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, 2012. © 2012 Wiley Periodicals, Inc.