Anatomy and adaptations of the chewing muscles in Daubentonia (Lemuriformes)

The Anatomical Record : Advances in Integrative Anatomy and Evolutionary Biology
Jonathan M G PerryAdam Hartstone-Rose

Abstract

The extractive foraging behavior in aye-ayes (Daubentonia madagascariensis) is unique among primates and likely has led to selection for a specialized jaw adductor musculature. Although this musculature has previously been examined in a subadult, until now, no one has reported the fascicle length, weight, and physiological cross-sectional area (PCSA) for these muscles in an adult aye-aye specimen. For the present study, we dissected an adult wild-born aye-aye from the Tsimbazaza Botanical and Zoological Park, Antananarivo, Madagascar. The aye-aye follows the general strepsirrhine pattern in its overall jaw adductor muscle anatomy, but has very large muscles and PCSA relative to body size. Fascicle length is also relatively great, but not nearly as much as in the juvenile aye-aye previously dissected. Perhaps chewing muscle fascicles begin relatively long, but shorten through use and growth as connective tissue sheets expand and allow for pinnation and increased PCSA. Alternately, it may be that aye-ayes develop fascicular adaptation to wide gapes early in ontogeny, only to increase PCSA through later development into adulthood. The functional demands related to their distinctive manner of extractive foraging are likely responsi...Continue Reading

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Citations

May 14, 2019·American Journal of Primatology·Sally L BornbuschClaudia K Gunsch
Jun 30, 2019·The Anatomical Record : Advances in Integrative Anatomy and Evolutionary Biology·Edwin DickinsonAdam Hartstone-Rose
Sep 12, 2019·The Anatomical Record : Advances in Integrative Anatomy and Evolutionary Biology·Kaitlyn C LeonardAdam Hartstone-Rose
Jan 14, 2018·The Anatomical Record : Advances in Integrative Anatomy and Evolutionary Biology·Jonathan M G Perry
Jan 14, 2018·The Anatomical Record : Advances in Integrative Anatomy and Evolutionary Biology·Elizabeth M St ClairJonathan M G Perry
Oct 22, 2019·American Journal of Physical Anthropology·Adam Hartstone-RoseAnthony Herrel
Nov 13, 2019·The Anatomical Record : Advances in Integrative Anatomy and Evolutionary Biology·Edwin DickinsonAdam Hartstone-Rose
Jan 14, 2018·The Anatomical Record : Advances in Integrative Anatomy and Evolutionary Biology·Edwin DickinsonKornelius Kupczik
Jan 14, 2018·The Anatomical Record : Advances in Integrative Anatomy and Evolutionary Biology·Anne-Claire FabreMaÏtena Dumont
Oct 16, 2018·Journal of Anatomy·Paulo de Souza JuniorAndré Luiz Quagliatto Santos
Jan 24, 2021·Scientific Reports·Kaitlyn C LeonardAdam Hartstone-Rose
Apr 13, 2021·The Anatomical Record : Advances in Integrative Anatomy and Evolutionary Biology·Kaitlyn C LeonardAdam Hartstone-Rose

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