Morphomuseum: An Online Platform for Publication and Storage of Virtual Specimens

Lebrun, Renaud; Orliac, Maëva J.

doi:10.1017/scs.2017.14

Cited by 40 publications

(24 citation statements)

References 20 publications

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“…The diameter of the spiral canal was measured in the first quarter of the basal turn. Linear measurements were taken using the 3D measurement tool of AVIZO 9.0 (FEI) and the curve info option of ISE-MeshTools [46]. Volumes of the bony labyrinth were calculated including the endolymphatic and perilymphatic ducts, with AVIZO 9.0.…”

Section: Vestibular Systemmentioning

confidence: 99%

Infrasonic and Ultrasonic Hearing Evolved after the Emergence of Modern Whales

Mourlam

Orliac

2017

Current Biology

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Mysticeti (baleen whales) and Odontoceti (toothed whales) today greatly differ in their hearing abilities: Mysticeti are presumed to be sensitive to infrasonic noises [1-3], whereas Odontoceti are sensitive to ultrasonic sounds [4-6]. Two competing hypotheses exist regarding the attainment of hearing abilities in modern whales: ancestral low-frequency sensitivity [7-13] or ancestral high-frequency sensitivity [14, 15]. The significance of these evolutionary scenarios is limited by the undersampling of both early-diverging cetaceans (archaeocetes) and terrestrial hoofed relatives of cetaceans (non-cetacean artiodactyls). Here, we document for the first time the bony labyrinth, the hollow cavity housing the hearing organ, of two species of protocetid whales from Lutetian deposits (ca. 46-43 Ma) of Kpogamé, Togo. These archaeocete cetaceans, which are transitional between terrestrial and aquatic forms, prove to be a key for determining the hearing abilities of early whales. We propose a new evolutionary picture for the early stages of this history, based on qualitative and quantitative studies of the cochlear morphology of an unparalleled sample of extant and extinct land artiodactyls and cetaceans. Contrary to the hypothesis that archaeocetes have been more sensitive to high-frequency sounds than their terrestrial ancestors [15], we demonstrate that early cetaceans presented a cochlear functional pattern close to that of their terrestrial relatives, and that specialization for infrasonic or ultrasonic hearing in Mysticeti or Odontoceti, respectively, instead only occurred in fully aquatic whales, after the emergence of Neoceti (Mysticeti+Odontoceti).

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Section: Vestibular Systemmentioning

confidence: 99%

Infrasonic and Ultrasonic Hearing Evolved after the Emergence of Modern Whales

Mourlam

Orliac

2017

Current Biology

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“…The six broken parts of the mandibular branch have been segmented separately in different labelfields with AVIZO 9.0. The surfaces of the six resulting fragments have been extracted and their position before breakage was restored using ISE-MeshTools (Lebrun, 2014;Lebrun and Orliac, 2017). A single 3D object was created by merging together the seven surfaces.…”

Section: Methodsmentioning

confidence: 99%

A mandible of Diacodexis cf. gigasei (Artiodactyla, Diacodexeidae) from the Early Eocene locality of Palette (Bouches-du-Rhône, France)

Orliac¹,

Boivin²,

Tabuce³

2018

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“…Anatomical landmarks and curve semilandmarks were placed on each bone using IDAV Landmark Editor and MorphoDig (Supplementary Fig. 1; Wiley et al 2005;Lebrun & Orliac 2017). Using the function 'placePatch' in the R package Morpho, surface landmarks were projected onto each separate bone from a template specimen following the precautions suggested by Bardua and colleagues (2019a;Schlager 2017).…”

Section: D Geometric Morphometricsmentioning

confidence: 99%

Morphological Integration and Modularity in the Hyperkinetic Feeding System of Aquatic-foraging Snakes

Rhoda

Polly

Raxworthy

et al. 2020

Preprint

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The kinetic skull is a key innovation that allowed snakes to capture, manipulate, and swallow prey exclusively using their heads using the coordinated movement of 8 bones. Despite these unique feeding behaviors, patterns of evolutionary integration and modularity within the feeding bones of snakes in a phylogenetic framework have yet to be addressed. Here, we use a dataset of 60 µCT scanned skulls and high-density geometric morphometric methods to address the origin and patterns of variation and integration in the feeding bones of aquatic-foraging snakes. By comparing alternate superimposition protocols allowing us to analyze the entire kinetic feeding system simultaneously, we find that the feeding bones are highly integrated, driven predominantly by functional selective pressures. The most supported pattern of modularity contains four modules each associated with distinct functional roles: the mandible, the palatopterygoid arch, the maxilla, and the suspensorium. Further, the morphological disparity of each bone is not linked to its magnitude of integration, indicating that integration within the feeding system does not constrain morphological evolution and that adequate biomechanical solutions to a wide range of feeding ecologies and behaviors is readily evolvable within the constraint due to integration in the snake feeding system.

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Morphomuseum: An Online Platform for Publication and Storage of Virtual Specimens

Cited by 40 publications

References 20 publications

Infrasonic and Ultrasonic Hearing Evolved after the Emergence of Modern Whales

Infrasonic and Ultrasonic Hearing Evolved after the Emergence of Modern Whales

A mandible of Diacodexis cf. gigasei (Artiodactyla, Diacodexeidae) from the Early Eocene locality of Palette (Bouches-du-Rhône, France)

Morphological Integration and Modularity in the Hyperkinetic Feeding System of Aquatic-foraging Snakes

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