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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
Growth dynamics of Australia's polar dinosaurs
PLoS ONE, Volume 6, No. 8, Article e23339, Year 2011
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Description
Analysis of bone microstructure in ornithopod and theropod dinosaurs from Victoria, Australia, documents ontogenetic changes, providing insight into the dinosaurs' successful habitation of Cretaceous Antarctic environments. Woven-fibered bone tissue in the smallest specimens indicates rapid growth rates during early ontogeny. Later ontogeny is marked by parallel-fibered tissue, suggesting reduced growth rates approaching skeletal maturity. Bone microstructure similarities between the ornithopods and theropods, including the presence of LAGs in each group, suggest there is no osteohistologic evidence supporting the hypothesis that polar theropods hibernated seasonally. Results instead suggest high-latitude dinosaurs had growth trajectories similar to their lower-latitude relatives and thus, rapid early ontogenetic growth and the cyclical suspensions of growth inherent in the theropod and ornithopod lineages enabled them to successfully exploit polar regions. © 2011 Woodward et al.
Authors & Co-Authors
Woodward, Holly N.
United States, Bozeman
Montana State University
Rich, Thomas H.
Australia, Melbourne
Museum Victoria
Australia, Clayton
Monash University
Chinsamy, Anusuya
South Africa, Cape Town
University of Cape Town
Vickers-Rich, Patricia
Australia, Clayton
Monash University
Statistics
Citations: 43
Authors: 4
Affiliations: 4
Identifiers
Doi:
10.1371/journal.pone.0023339
e-ISSN:
19326203