The origins of mammal growth patterns during the Jurassic mammalian radiation
Authors/Creators
- 1. Natural History Museum
- 2. European Synchrotron Radiation Facility
- 3. Geological Survey of Finland
- 4. University of Bonn
- 5. New York Institute of Technology
- 6. University of Helsinki
- 7. Swiss Light Source
- 8. University of Bristol
- 9. University of Hull
- 10. University of Southampton
- 11. Oxford University Museum of Natural History
Description
We use synchrotron X-ray tomography of annual growth increments in the dental cementum of mammaliaforms (stem and crown fossil mammals) from three faunas across the Jurassic to map the origin of patterns of determinate growth, which is intrinsically related to mammalian endothermy. Although all fossils studied exhibited slower growth rates, longer lifespans, and delayed sexual maturity relative to comparably sized extant mammals, the earliest crown mammals developed significantly faster growth rates in early life that reduced at sexual maturity (determinate growth), compared to stem mammaliaforms. Estimation of basal metabolic rates (BMRs) suggests some fossil crown mammals had BMRs approaching the lowest rates of extant mammals. We suggest mammalian determinate growth first evolved during their mid-Jurassic adaptive radiation, although growth remained slower than in extant mammals.
Notes
Funding provided by: Engineering and Physical Sciences Research Council
ROR ID: https://ror.org/0439y7842
Award Number: NE/R009783/1
Funding provided by: Natural History Museum
ROR ID: https://ror.org/039zvsn29
Award Number:
Funding provided by: European Synchrotron Radiation Facility
ROR ID: https://ror.org/02550n020
Award Number: ES152
Funding provided by: European Community's Seventh Framework Programme (FP7/2007-2013)*
Crossref Funder Registry ID:
Award Number: n.°312284
Funding provided by: Paul Scherrer Institute
ROR ID: https://ror.org/03eh3y714
Award Number: 20141278
Funding provided by: Research Council of Finland
ROR ID: https://ror.org/05k73zm37
Award Number:
Funding provided by: Versus Arthritis
ROR ID: https://ror.org/02jkpm469
Award Number: 23115
Funding provided by: Alexander von Humboldt Foundation
ROR ID: https://ror.org/012kf4317
Award Number: 1204296
Funding provided by: Ginkgo Investments LTD
Award Number:
Funding provided by: University of Bristol
ROR ID: https://ror.org/0524sp257
Award Number:
Funding provided by: European Synchrotron Radiation Facility
ROR ID: https://ror.org/02550n020
Award Number: ES502
Funding provided by: European Synchrotron Radiation Facility
ROR ID: https://ror.org/02550n020
Award Number: ES583
Funding provided by: Paul Scherrer Institute
ROR ID: https://ror.org/03eh3y714
Award Number: 20151391
Funding provided by: Paul Scherrer Institute
ROR ID: https://ror.org/03eh3y714
Award Number: 20160404
Funding provided by: Paul Scherrer Institute
ROR ID: https://ror.org/03eh3y714
Award Number: 20180876
Files
Borealestes.zip
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