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Acoustic analyses of potential vocalization in lambeosaurine dinosaurs (Reptilia: Ornithischia)

Published online by Cambridge University Press:  08 February 2016

David B. Weishampel
David B. Weishampel*
Affiliation:
Department of Geology, University of Pennsylvania, Philadephia, Pennsylvania 19104
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Abstract

Lambeosaurine dinosaur crests are judged to have been conducive to resonation on the basis of an acoustic analysis of the structure of the nasal cavity. Size and shape of the nasal cavity suggest low vocal frequencies in adults, as does information on potential auditory acuity in these animals. Lateral diverticula (present in all but juvenile specimens) acted to suppress portions of the vocal spectrum. Juveniles vocalized at higher frequencies than adults and potential auditory sensitivity at high frequencies in adults suggests a high degree of parent-offspring vocal communication. Sexual variation and causes of selection for low frequency vocalization are also examined.

Type
Articles
Information
Paleobiology , Volume 7 , Issue 2 , Spring 1981 , pp. 252 - 261
Copyright
Copyright © The Paleontological Society 

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References

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