Abstract #0507
MR imaging of crocodilians can help for brain volume estimation of some extinct vertebrates
Daniel Jirak 1 , Jiri Janacek 2 , and Martin Kundrat 2,3
1
IKEM, Prague, Czech Republic,
2
Institute
of Physiology, Academy of Sciences of the Czech
Republic, Prague, Czech Republic,
3
Evolutionary
Biology Centre, Uppsala University, Uppsala, Sweden
Here we provide a new approach for assessment of
encephalic volume of some extinct vertebrates. We used
crocodilians as a proxy to investigate the postnatal
development of endoneurocranial and encephalic shape in
living archosaurs and found noticeable dependence on the
body size. Our results support a hypothesis that
increased body size likely imposed a new spatial
configuration for development of the central nervous
system during the evolution of gigantism in
tyrannosaurs.
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