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

Published on Sep 1, 2012in Bone4.36
· DOI :10.1016/j.bone.2012.05.002
Edwin Alberto Cadena Rueda11
Estimated H-index: 11
(NCSU: North Carolina State University),
Mary H. Schweitzer24
Estimated H-index: 24
(NCSU: North Carolina State University)
Abstract
article i nfo 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' ,a nd 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 indepen- dent 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.
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  • References (32)
  • Citations (18)
References32
Newest
#1Rishikesh N. Kulkarni (Academic Center for Dentistry Amsterdam)H-Index: 3
#2Astrid D. Bakker (Academic Center for Dentistry Amsterdam)H-Index: 31
Last.Vincent Everts (Academic Center for Dentistry Amsterdam)H-Index: 52
view all 7 authors...
#1Lei Cao (Tokyo Medical and Dental University)H-Index: 1
#2Takeshi Moriishi (Nagasaki University)H-Index: 14
Last.AkiraYamaguchi (Tokyo Medical and Dental University)H-Index: 54
view all 9 authors...
#1Ana Santos (Academic Center for Dentistry Amsterdam)H-Index: 7
#2Astrid D. Bakker (Academic Center for Dentistry Amsterdam)H-Index: 31
Last.J. Klein Nulend (Academic Center for Dentistry Amsterdam)H-Index: 57
view all 6 authors...
Cited By18
Newest
#1Alida M. Bailleul (CAS: Chinese Academy of Sciences)H-Index: 6
#2Jingmai K. O'Connor (CAS: Chinese Academy of Sciences)H-Index: 22
Last.Mary H. SchweitzerH-Index: 24
view all 0 authors...
#1Dawid Surmik (University of Silesia in Katowice)H-Index: 3
#2Mateusz Dulski (University of Silesia in Katowice)H-Index: 12
Last.R. Pawlicki (Jagiellonian University Medical College)
view all 5 authors...
#1Timothy P. Cleland (University of Texas at Austin)H-Index: 11
#2Elena R. Schroeter (NCSU: North Carolina State University)H-Index: 8
Last.Dorothy R. Ahlf (NU: Northwestern University)H-Index: 12
view all 14 authors...
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