Variation in osteocytes morphology vs bone type in turtle shell and their exceptional preservation from the Jurassic to the present

Here we describe variations in osteocytes derived from each of the three bone layers that comprise the turtle shell. We examine osteocytes in bone from four extant turtle species to form a morphological ‘baseline’, and then compare these with morphologies of osteocytes preserved in Cenozoic and Meso...

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Autores Principales: Cadena, Edwin A., Schweitzer, Mary H.
Formato: Artículo (Article)
Lenguaje:Inglés (English)
Publicado: Elsevier 2012
Materias:
Acceso en línea:https://repository.urosario.edu.co/handle/10336/28425
https://doi.org/10.1016/j.bone.2012.05.002
id ir-10336-28425
recordtype dspace
spelling ir-10336-284252020-08-28T15:48:27Z Variation in osteocytes morphology vs bone type in turtle shell and their exceptional preservation from the Jurassic to the present Variación de la morfología de los osteocitos frente al tipo de hueso en el caparazón de tortuga y su excepcional conservación desde el Jurásico hasta la actualidad Cadena, Edwin A. Schweitzer, Mary H. Osteocyte morphology Testudines Cenozoic Mesozoic Exceptional preservation Here we describe variations in osteocytes derived from each of the three bone layers that comprise the turtle shell. We examine osteocytes in bone from four extant turtle species to form a morphological ‘baseline’, and then compare these with morphologies of osteocytes preserved in Cenozoic and Mesozoic fossils. Two different morphotypes of osteocytes are recognized: flattened-oblate osteocytes (FO osteocytes), which are particularly abundant in the internal cortex and lamellae of secondary osteons in cancellous bone, and stellate osteocytes (SO osteocytes), principally present in the interstitial lamellae between secondary osteons and external cortex. We show that the morphology of osteocytes in each of the three bone layers is conserved through ontogeny. We also demonstrate that these morphological variations are phylogenetically independent, as well as independent of the bone origin (intramembranous or endochondral). Preservation of microstructures consistent with osteocytes in the morphology in Cenozoic and Mesozoic fossil turtle bones appears to be common, and occurs in diverse diagenetic environments including marine, freshwater, and terrestrial deposits. These data have potential to illuminate aspects of turtle biology and evolution previously unapproachable, such as estimates of genome size of extinct species, differences in metabolic rates among different bones from a single individual, and potential function of osteocytes as capsules for preservation of ancient biomolecules. 2012-05-11 2020-08-28T15:48:10Z info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion ISSN: 0221-8747 EISSN: 8756-3282 https://repository.urosario.edu.co/handle/10336/28425 https://doi.org/10.1016/j.bone.2012.05.002 eng info:eu-repo/semantics/restrictedAccess application/pdf Elsevier Bone, Metabolic Bone Disease and Related Research
institution EdocUR - Universidad del Rosario
collection DSpace
language Inglés (English)
topic Osteocyte morphology
Testudines
Cenozoic
Mesozoic
Exceptional preservation
spellingShingle Osteocyte morphology
Testudines
Cenozoic
Mesozoic
Exceptional preservation
Cadena, Edwin A.
Schweitzer, Mary H.
Variation in osteocytes morphology vs bone type in turtle shell and their exceptional preservation from the Jurassic to the present
description Here we describe variations in osteocytes derived from each of the three bone layers that comprise the turtle shell. We examine osteocytes in bone from four extant turtle species to form a morphological ‘baseline’, and then compare these with morphologies of osteocytes preserved in Cenozoic and Mesozoic fossils. Two different morphotypes of osteocytes are recognized: flattened-oblate osteocytes (FO osteocytes), which are particularly abundant in the internal cortex and lamellae of secondary osteons in cancellous bone, and stellate osteocytes (SO osteocytes), principally present in the interstitial lamellae between secondary osteons and external cortex. We show that the morphology of osteocytes in each of the three bone layers is conserved through ontogeny. We also demonstrate that these morphological variations are phylogenetically independent, as well as independent of the bone origin (intramembranous or endochondral). Preservation of microstructures consistent with osteocytes in the morphology in Cenozoic and Mesozoic fossil turtle bones appears to be common, and occurs in diverse diagenetic environments including marine, freshwater, and terrestrial deposits. These data have potential to illuminate aspects of turtle biology and evolution previously unapproachable, such as estimates of genome size of extinct species, differences in metabolic rates among different bones from a single individual, and potential function of osteocytes as capsules for preservation of ancient biomolecules.
format Artículo (Article)
author Cadena, Edwin A.
Schweitzer, Mary H.
author_facet Cadena, Edwin A.
Schweitzer, Mary H.
author_sort Cadena, Edwin A.
title Variation in osteocytes morphology vs bone type in turtle shell and their exceptional preservation from the Jurassic to the present
title_short Variation in osteocytes morphology vs bone type in turtle shell and their exceptional preservation from the Jurassic to the present
title_full Variation in osteocytes morphology vs bone type in turtle shell and their exceptional preservation from the Jurassic to the present
title_fullStr Variation in osteocytes morphology vs bone type in turtle shell and their exceptional preservation from the Jurassic to the present
title_full_unstemmed Variation in osteocytes morphology vs bone type in turtle shell and their exceptional preservation from the Jurassic to the present
title_sort variation in osteocytes morphology vs bone type in turtle shell and their exceptional preservation from the jurassic to the present
publisher Elsevier
publishDate 2012
url https://repository.urosario.edu.co/handle/10336/28425
https://doi.org/10.1016/j.bone.2012.05.002
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