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Sensory Evolution on the ThresholdAdaptations in Secondarily Aquatic Vertebrates$
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J. G. M. Thewissen

Print publication date: 2008

Print ISBN-13: 9780520252783

Published to California Scholarship Online: March 2012

DOI: 10.1525/california/9780520252783.001.0001

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PRINTED FROM CALIFORNIA SCHOLARSHIP ONLINE (www.california.universitypressscholarship.com). (c) Copyright University of California Press, 2021. All Rights Reserved. An individual user may print out a PDF of a single chapter of a monograph in CALSO for personal use.date: 20 September 2021

Comparative and Functional Anatomy of Balance in Aquatic Reptiles and Birds

Comparative and Functional Anatomy of Balance in Aquatic Reptiles and Birds

Chapter:
(p.233) 15 Comparative and Functional Anatomy of Balance in Aquatic Reptiles and Birds
Source:
Sensory Evolution on the Threshold
Author(s):

Justin A. Georgi

Justin S. Sipla

Publisher:
University of California Press
DOI:10.1525/california/9780520252783.003.0015

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

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