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V. de Buffrénil
University of Paris
10Publications
7H-index
638Citations
Publications 10
Newest
#1François Clarac (University of Paris)H-Index: 5
#2V. de Buffrénil (University of Paris)H-Index: 7
Last.Alexandra Quilhac (University of Paris)H-Index: 6
view all 4 authors...
Vascularization in the core of crocodylian osteoderms, and in their superficial pits has been hypothesized to be a key feature involved in physiological thermoregulation and/or acidosis buffering during anoxia (apnea). However, up to now, there have been no quantitative data showing that the inner, or superficial, blood supply of the osteoderms is greater than that occurring in neighboring dermal tissues. We provide such data: our results clearly indicate that the vascular networks in both the o...
#1François Clarac (University of Paris)H-Index: 5
#2Thibaud SouterH-Index: 5
Last.Raphaël Cornette (University of Paris)H-Index: 8
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Previous quantitative assessments of the crocodylians' dermal bone ornamentation (this ornamentation consists of pits and ridges) has shown that bone sculpture results in a gain in area that differs between anatomical regions: it tends to be higher on the skull table than on the snout. Therefore, a comparative phylogenetic analysis within 17 adult crocodylian specimens representative of the morphological diversity of the 24 extant species has been performed, in order to test if the gain in area ...
#1V. de Buffrénil (University of Paris)H-Index: 7
#2François Clarac (University of Paris)H-Index: 5
Last.Michel Laurin (University of Paris)H-Index: 32
view all 7 authors...
Bone ornamentation, that is, hollow (pits and grooves) or protruding (ridges) repetitive reliefs on the surface of dermal bones, is a frequent, though poorly studied and understood, feature in vertebrates. One of the most typical examples of this characteristic is given by the Crurotarsi, a taxon formed by the crocodilians and their closest allies, which generally display deep ornamentation on skull roof and osteoderms. However, the ontogenetic process responsible for the differentiation and dev...
#1M. Dumont (MPG: Max Planck Society)H-Index: 1
#2Michel Laurin (CNRS: Centre national de la recherche scientifique)H-Index: 32
Last.V. de BuffrénilH-Index: 7
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Inner vertebral architecture is poorly known, except in human and laboratory animals. In order to document this topic at a broad comparative level, a 2D-histomorphometric study of vertebral centra was conducted in a sample of 98 therian mammal species, spanning most of the size range and representing the main locomotor adaptations known in therian taxa. Eleven variables relative to the development and geometry of trabecular networks were extracted from CT scan mid-sagittal sections. Phylogeny-in...
#1J.G. CanerH-Index: 1
#2K. BandelH-Index: 1
Last.Louise ZylberbergH-Index: 4
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#1Hélène Francillon-Vieillot (University of Paris)H-Index: 7
#2V. de Buffrénil (University of Paris)H-Index: 7
Last.A. de Ricqlès (University of Paris)H-Index: 6
view all 8 authors...
La structure microanatomique et histologique du squelette (region otico-occipitale) de la Rhytine illustre de facon claire la notion de pachyosteosclerose. Les caracteres fondamentaux de cette specialisation structurale de l'os: hyperplasie des corticales periostiques, inhibition plus ou moins poussee des activites chondroclasique et osteoclasique conduisant a la persistance du cartilage calcifie et a un faible taux de remaniement haversien de l'os, sont en tous points identiques a ce que presen...
#1V. de BuffrénilH-Index: 7
#2A. de Ricqlès (University of Paris)H-Index: 6
Last.Daryl P. Domning (HU: Howard University)H-Index: 26
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ABSTRACT Histological study of the ribs in two archaeocetes, Basilosaurus cetoides and Zygorhiza kochii, reveals conspicuous pachyostosis, with hyperostosis of periosteal cortices and absence of a free medullary cavity. In addition, abundant remains of calcified cartilage matrix, associated with extensive globular ossification, exist within the medulla. Among Cetacea, these features seem to be unique to the archaeocetes. Conversely, the structural peculiarities of bone in these animals are ident...
#1V. de BuffrénilH-Index: 7
#2James O. Farlow (IUPUI: Indiana University – Purdue University Indianapolis)H-Index: 25
Last.A. de RicqlèsH-Index: 6
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Histological examination of Stegosaurus dorsal bony plates shows a thin wall of incompletely remodeled bone surrounding a large cancellous region containing some large “pipes” delineated by thin bony walls. Growth proceeded mainly from the basal region of the plates. Histological observations provide a test against which several functional interpretations of the plates are checked. While some interpretations (e.g., plates as armor) are clearly falsified, others (linked to thermoregulatory functi...
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