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Skull Morphological Evolution in Faunivorous Marsupials

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American and Australasian Marsupials

Abstract

Marsupials have a long evolutionary history of diversification in the Southern Hemisphere, where they expanded geographic distribution from America through Antarctica, reaching Australasia. American and Australasian marsupials have mostly evolved and diversified independently, albeit sharing some evolutionary patterns of morphological variation. Based on morphological traits of the cranium and the mandible, it was found that marsupial phenotypic variation significantly correlates with dietary adaptions along a size gradient from small insectivorous taxa, toward intermediate omnivores and then larger carnivores. This variation is phylogenetically structured in both biogeographical groups. Evolutionary rates in cranial morphology do not differ between American and Australasian marsupials; however differences occur in the mandible with Australasian species evolving at faster rates than American ones. This is probably the result of larger size variation associated to functional demands in producing stronger bite force by the largest carnivorous taxa within this clade.

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Financial support was provided by UENF (2020–2021) and FAPERJ (postdoctoral fellowships to J.B.), CAPES (finance code 001 for J.B. and M.B. and Sandwich PhD grant/Process number 88881.189949/2018–01 to J.B.), and CNPq (research grant for N.C.C. during 2019–2022).

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Correspondence to Carlo Meloro .

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© 2022 Springer Nature Switzerland AG

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Bubadué, J., Cáceres, N., Brum, M., Meloro, C. (2022). Skull Morphological Evolution in Faunivorous Marsupials. In: Cáceres, N.C., Dickman, C.R. (eds) American and Australasian Marsupials. Springer, Cham. https://doi.org/10.1007/978-3-030-88800-8_7-1

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  • DOI: https://doi.org/10.1007/978-3-030-88800-8_7-1

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  • Publisher Name: Springer, Cham

  • Print ISBN: 978-3-030-88800-8

  • Online ISBN: 978-3-030-88800-8

  • eBook Packages: Springer Reference Biomedicine and Life SciencesReference Module Biomedical and Life Sciences

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