Chapter

Comparative and Functional Anatomy of Balance in Aquatic Reptiles and Birds

Justin A. Georgi and Justin S. Sipla

in Sensory Evolution on the Threshold

Published by University of California Press

Published in print April 2008 | ISBN: 9780520252783
Published online March 2012 | e-ISBN: 9780520934122 | DOI: http://dx.doi.org/10.1525/california/9780520252783.003.0015
Comparative and Functional Anatomy of Balance in Aquatic Reptiles and Birds

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This chapter discusses the structure of the inner ear of aquatic reptiles and birds and their variations in morphology and functional responses. It examines the anatomy and function of semicircular canals and investigates the evolutionary changes of canal shape in response to the reinvasion of aquatic environments by turtles, varanoids, crocodilians, and birds. It also shows the phylogenetic differences in canal shape between these groups, as well as the consistent morphological response to the adoption of a secondarily aquatic lifestyle.

Keywords: inner ear; aquatic reptiles; aquatic birds; semicircular canals; turtles; varanoids; crocodilians; birds; secondarily aquatic lifestyle

Chapter.  9669 words.  Illustrated.

Subjects: Zoology and Animal Sciences

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