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Asymmetry of the nasofacial skull in toothed whales (Odontoceti)
Department II of Anatomy, University of Cologne, Cologne, Germany.
Swedish Species Information Centre/ArtDatabanken, Swedish University of Agricultural Sciences, Uppsala, Sweden.ORCID iD: 0000-0002-3985-8405
Department of Anatomy III (Dr. Senckenbergische Anatomie), Johann Wolfgang Goethe University Frankfurt am Main, Frankfurt am Main, Germany.
2017 (English)In: Journal of Zoology, ISSN 0952-8369, E-ISSN 1469-7998, Vol. 302, no 1, p. 15-23Article in journal (Refereed) Published
Abstract [en]

In this study, the nasal asymmetry of odontocetes (toothed whales) was analyzed morphometrically by placing landmarks on photographed nasofacial skulls from 12 different species and genera that belong to four odontocete families. The results show that the degree of asymmetry tends to be linked with the mechanism of click sound generation in odontocetes. The narrow-banded high-frequency echolocators, such as Phocoenidae, Inia geoffrensis, Pontoporia blainvillei and Cephalorhynchus commersonii, show a more symmetric skull than the broad-banded low-frequency species (most delphinids). Exceptions to this tendency are, for example Kogia sima, with narrow-banded high-frequency clicks and a high degree of nasofacial asymmetry, and Feresa attenuata, a delphinid with broad-banded low-frequency clicks and a moderate degree of nasofacial asymmetry. Accordingly, there is no consistent functional correlation between click type and skull asymmetry probably because the nasofacial skull does not strictly reflect the anatomy of the sound generating nasal soft structures.

Place, publisher, year, edition, pages
Wiley-Blackwell Publishing Inc., 2017. Vol. 302, no 1, p. 15-23
Keywords [en]
toothed whales, odontocetes, dolphins, porpoises, skull, asymmetry, echolocation, morphometry
National Category
Zoology Environmental Sciences
Identifiers
URN: urn:nbn:se:his:diva-18325DOI: 10.1111/jzo.12425ISI: 000400303200003Scopus ID: 2-s2.0-85006826700OAI: oai:DiVA.org:his-18325DiVA, id: diva2:1415352
Note

© 2016 The Zoological Society of London

Available from: 2020-03-18 Created: 2020-03-18 Last updated: 2021-01-21Bibliographically approved

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Leidenberger, Sonja

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