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Evolution of the Auditory System in Synapsida (“Mammal-Like Reptiles” and Primitive Mammals) as Seen in the Fossil Record

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The Evolutionary Biology of Hearing

Abstract

Based on evidence from comparative anatomy, embryology, and paleontology, it is well established that the middle ear of existing mammals is morphologically unique, the tympanic bone, malleus, incus, and tensor tympani muscle all being homologous with components of the feeding apparatus of other vertebrates (Fig. 28.1, see below for details). Extant mammals are also unique in having a very elongate cochlea, and sensitivity to a broader range of sound frequencies than other vertebrates, usually extending beyond 10,000 Hz. In addition, they are distinctive in generally having a protruding pinna (auricle) and a long, tubular external auditory meatus. The present chapter examines the extensive fossil evidence concerning the nature of the auditory machinery of early mammals and their antecedents. Both authors of the present account have written on this subject, arriving at different initial interpretations in certain regards (Hop-son 1966; Allin 1975).

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Authors
  1. Edgar F. Allin
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  2. James A. Hopson
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Editor information

Editors and Affiliations

  1. Department of Otorhinolaryngology, Louisiana State University Medical Center, New Orleans, LA, 70112, USA

    Douglas B. Webster

  2. Department of Zoology, University of Maryland, College Park, MD, 20742, USA

    Arthur N. Popper

  3. Parmly Hearing Institute and Loyola University of Chicago, Chicago, IL, 60626, USA

    Richard R. Fay

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© 1992 Springer-Verlag New York Inc.

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Allin, E.F., Hopson, J.A. (1992). Evolution of the Auditory System in Synapsida (“Mammal-Like Reptiles” and Primitive Mammals) as Seen in the Fossil Record. In: Webster, D.B., Popper, A.N., Fay, R.R. (eds) The Evolutionary Biology of Hearing. Springer, New York, NY. https://doi.org/10.1007/978-1-4612-2784-7_37

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  • DOI: https://doi.org/10.1007/978-1-4612-2784-7_37

  • Publisher Name: Springer, New York, NY

  • Print ISBN: 978-1-4612-7668-5

  • Online ISBN: 978-1-4612-2784-7

  • eBook Packages: Springer Book Archive

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