Biology of the sauropod dinosaurs: the evolution of gigantism.
Bottom Line: Scaling relationships between gastrointestinal tract size and basal metabolic rate (BMR) suggest that sauropods compensated for the lack of particle reduction with long retention times, even at high uptake rates.The extensive pneumatization of the axial skeleton resulted from the evolution of an avian-style respiratory system, presumably at the base of Saurischia.An avian-style respiratory system would also have lowered the cost of breathing, reduced specific gravity, and may have been important in removing excess body heat.
Affiliation: Steinmann Institute, University of Bonn, Germany. firstname.lastname@example.orgShow MeSH
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Mentions: We are now able to identify those hypotheses that may explain gigantism and those that probably do not, based on a current (2010) understanding. This leads to the recognition that the gigantism of sauropod dinosaurs was made possibly by a unique combination of two retained plesiomorphies and three key evolutionary innovations (Fig. 9).
Affiliation: Steinmann Institute, University of Bonn, Germany. email@example.com