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Type: Journal article
Title: Cranial morphology and taxonomic resolution of some dolphin taxa (Delphinidae) in Australian waters, with a focus on the genus Tursiops
Author: Jedensjö, M.
Kemper, C.
Krützen, M.
Citation: Marine Mammal Science, 2017; 33(1):187-205
Publisher: Wiley
Issue Date: 2017
ISSN: 0824-0469
Statement of
Maria Jedensjö, Catherine M. Kemper, Michael Krützen
Abstract: Phylogenetic relationships in the family Delphinidae have been widely debated. We examined 347 skulls of Tursiops, Stenella, Delphinus, Steno, Lagenodelphis, and Sousa in order to resolve the phylogenetic position of Australian species of Tursiops. Five Tursiops type specimens were included. Cranial morphology was described using 2-dimensional (2-D) and 3-dimensional geometric morphometrics (3-GM), counts and categorical data. Analyses showed a clear morphological separation of Tursiops, including type specimens, from other genera. The three Stenella species did not cluster together. Stenella attenuata clustered with Delphinus delphis, and Stenella coeruleoalba with Lagenodelphis hosei. Length and width of the skull and rostrum were important discriminators in both methods. For 3-D data, round vs. angular posterior skull shape distinguished some genera. Taxa that overlapped in the multivariate analyses had different mean tooth counts. Our study challenges genetic studies that identified Tursiops as polyphyletic, with T. aduncus closer to S. attenuata.
Keywords: Tursiops; Stenella; Delphinus; Lagenodelphis; Sousa; Steno; Delphininae; Delphinidae; morphology; geometric morphometrics
Rights: © 2016 Society for Marine Mammalogy
RMID: 0030063930
DOI: 10.1111/mms.12356
Appears in Collections:Ecology, Evolution and Landscape Science publications

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