Long bone histology of Ophiacodon reveals the geologically earliest occurrence of fibrolamellar bone in the mammalian stem lineage
Long bone histology of Ophiacodon reveals the geologically earliest occurrence of fibrolamellar bone in the mammalian stem lineage
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蛇尾蛇的长骨组织学揭示了哺乳动物干谱系中地质上最早出现的纤维板层骨
DOI:
10.1016/j.crpv.2017.02.002
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发表时间:
2017
影响因子:
1.1
通讯作者:
P. M. Sander
中科院分区:
文献类型:
--
作者:
Shelton;P. M. Sander
Shared histological characteristics have been observed in the bone matrix and vascularity between Ophiacodontidae and the later therapsids (Synapsida). Historically, this coincidence has been explained as simply a reflection of the presumed aquatic lifestyle ofOphiacodonor even a sign of immaturity. Here we show, by histologically sampling an ontogenetic series ofOphiacodonhumeri, as well as additional material, the existence of fibrolamellar bone (FLB) in the postcranial bones of a pelycosaur. Our findings have reaffirmed what previous studies first described as fast growing tissue, and by proxy, have disproven that the highly vascularized cortex is simply a reflection of young age. This tissue demonstrates the classic histological characteristics of true FLB. The cortex consists of primary osteons in a woven bone matrix and remains highly vascularized throughout ontogeny, providing evidence for fast skeletal growth. Overall, the FLB tissue we have described inOphiacodonis more advanced or “mammal-like” in terms of the osteonal development, bone matrix, and skeletal growth than what has been described thus far for any other pelycosaur taxon.With regards to the histological record, our results remain inconclusive as to the preferred ecology ofOphiacodondue to a similar cortical vascularity pattern exhibited by other carnivorous pelycosaurs. Our findings have set the evolutionary origins of FLB and high skeletal growth rates back approximately 20 million years to the Early Permian, and by phylogenetic extension perhaps the Late Carboniferous.
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影响因子:
64.8
作者:
P. Sander;O. Mateus;T. Laven;Nils Knötschke
通讯作者:
P. Sander;O. Mateus;T. Laven;Nils Knötschke
DOI:
--
发表时间:
2006
期刊:
影响因子:
--
作者:
D. Gower;S. Nesbitt
通讯作者:
S. Nesbitt
DOI:
--
发表时间:
2012
影响因子:
1.2
作者:
Christen D. Shelton;P. Sander;Koen Stein;H. Winkelhorst
通讯作者:
H. Winkelhorst
DOI:
--
发表时间:
1988
期刊:
影响因子:
--
作者:
T. Hentz
通讯作者:
T. Hentz
DOI:
--
发表时间:
1940
期刊:
影响因子:
--
作者:
A. Romer;L. I. Price
通讯作者:
L. I. Price