Homology of the muscles within the uropatagium membrane in Leschenault’s rousette ( Rousettus leschenaultii )

Kobayashi, Masayuki

doi:10.1016/j.mambio.2017.07.004

Cited by 3 publications

(1 citation statement)

References 10 publications

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“…We also repeated all of the following analyses using datasets from which we excluded the Old World fruit bats (Pteropodidae) due to their differing calcar anatomy. Pteropodid calcars are described as inserting on the tendon of the gastrocnemius muscle rather than articulating with the calcaneus and are consequently hypothesized to not be homologous to the calcars of other bats (Schutt and Simmons ; Kobayashi ). All data used in analyses are provided as a spreadsheet in the Supporting Information.…”

Section: Methodsmentioning

confidence: 99%

Anatomical diversification of a skeletal novelty in bat feet

2019

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Neomorphic, membrane‐associated skeletal rods are found in disparate vertebrate lineages, but their evolution is poorly understood. Here we show that one of these elements—the calcar of bats (Chiroptera)—is a skeletal novelty that has anatomically diversified. Comparisons of evolutionary models of calcar length and corresponding disparity‐through‐time analyses indicate that the calcar diversified early in the evolutionary history of Chiroptera, as bats phylogenetically diversified after evolving the capacity for flight. This interspecific variation in calcar length and its relative proportion to tibia and forearm length is of functional relevance to flight‐related behaviors. We also find that the calcar varies in its tissue composition among bats, which might affect its response to mechanical loading. We confirm the presence of a synovial joint at the articulation between the calcar and the calcaneus in some species, which suggests the calcar has a kinematic functional role. Collectively, this functionally relevant variation suggests that adaptive advantages provided by the calcar led to its anatomical diversification. Our results demonstrate that novel skeletal additions can become integrated into vertebrate body plans and subsequently evolve into a variety of forms, potentially impacting clade diversification by expanding the available morphological space into which organisms can evolve.

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Section: Methodsmentioning

confidence: 99%

Anatomical diversification of a skeletal novelty in bat feet

2019

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Sesamoids and Morphological Variation: a Hypothesis on the Origin of Rod-like Skeletal Elements in Aerial Mammals

Amador

2021

J Mammal Evol

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Anatomical diversification of a skeletal novelty in bat feet

Stanchak

Arbour

Santana

2018

Preprint

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Neomorphic, membrane-associated skeletal rods are found in disparate vertebrate lineages, but their evolution is poorly understood. Here we show that one of these elements—the calcar of bats (Chiroptera)—is a skeletal novelty that has anatomically diversified. Our comparisons of evolutionary models of calcar length and corresponding disparity-through-time analyses indicate that the calcar diversified early in the evolutionary history of Chiroptera, as bats systematically radiated after evolving the capacity for flight. We find interspecific variation in a variety of anatomical parameters of probable importance for calcar function, which suggests that adaptive advantages provided by the calcar led to its anatomical diversification. In addition to overall length, we find that the calcar varies among bats in its tissue composition, and a synovial joint is present at the articulation between the calcar and the calcaneus ankle bone in some species. This suggests the calcar has a kinematic functional role. Our results demonstrate that novel skeletal additions can become integrated into vertebrate body plans and subsequently evolve into a variety of forms, potentially impacting clade diversification by expanding the available morphological space into which organisms can evolve.

show abstract

Homology of the muscles within the uropatagium membrane in Leschenault’s rousette ( Rousettus leschenaultii )

Cited by 3 publications

References 10 publications

Anatomical diversification of a skeletal novelty in bat feet

Anatomical diversification of a skeletal novelty in bat feet

Sesamoids and Morphological Variation: a Hypothesis on the Origin of Rod-like Skeletal Elements in Aerial Mammals

Anatomical diversification of a skeletal novelty in bat feet

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