Can secondary osteons be used as ontogenetic indicators in sauropods? Extending the histological ontogenetic stages into senescence
Can secondary osteons be used as ontogenetic indicators in sauropods? Extending the histological ontogenetic stages into senescence
复制标题
次生骨可以用作蜥脚类恐龙的个体发育指标吗？
DOI：
10.1017/pab.2016.47
复制
发表时间：
2017
期刊：
影响因子：
2.7
通讯作者：
K. Stein
中科院分区：
文献类型：
--
作者：
Mitchell;P. M. Sander;K. Stein
蜥脚类动物的骨骼组织学为了解这些巨大动物的生活史提供了大量的线索。然而，由于生长速度高，年生长环在蜥脚类动物长骨中并不常见，因此直接测量生长速度和确定性成熟需要其他方法。组织学个体发生分期（HOS）已被建立，用于描述基底巨龙目和梁龙科以及随后的泰坦龙目在发育过程中骨组织的变化。尽管如此，目前的HOS模型无法区分个体发育晚期的骨组织，此时蜥脚类动物已经达到渐近大小，并继续生活到衰老，但它们的长骨被继发性骨广泛重塑，所有的原发性骨都被破坏了。本文建立了8个蜥脚类类群（Apatosaurinae、Giraffatitan brancai、Camarasaurus spp.、Dicraeosaurus spp.、Ampelosaurus atacis、Phuwiangosaurus sirindhornae、Magyarosaurus dacus和Alamosaurus sanjuanensis）的骨发育重塑阶段（RS），并发现除了Dicraeosaurus和Magyarosaurus外，RS与所研究类群的相应股骨长度（CFL）显著相关。重塑阶段是基于可观察到的来自皮层最内层、中层和最外层的横切骨的最大代数。与CFL的相关性表明，继发性骨存在一个个体发生信号，可以延长组织学上的个体发生阶段。重塑阶段也通过个体发生为蜥脚类动物的组织学变化提供了额外的见解。这种方法有可能被用于其他类群，如thyreophohorans和许多鸟目动物，通过发育形成哈弗氏组织。
Sauropod bone histology has provided a great deal of insight into the life history of these enormous animals. However, because of high growth rates, annual growth rings are not common in sauropod long bones, so directly measuring growth rates and determining sexual maturity require alternative measures. Histological ontogenetic stages (HOS) have been established to describe the changes in bone histology through development for basal Macronaria and Diplodocoidea, and subsequently for Titanosauria. Despite this, the current HOS model is not able to discriminate bone tissues in late ontogeny, when sauropods had reached asymptotic size and continued to live into senescence but their long bones became extensively remodeled by secondary osteons and all primary bone was destroyed. Here we establish remodeling stages (RS) to characterize the Haversian bone development through ontogeny in eight sauropod taxa (Apatosaurinae, Giraffatitan brancai, Camarasaurus spp., Dicraeosaurus spp., Ampelosaurus atacis, Phuwiangosaurus sirindhornae, Magyarosaurus dacus, and Alamosaurus sanjuanensis) and find significant correlation of RS with corresponding femur length (CFL) for the studied taxa, with the exception of Dicraeosaurus and Magyarosaurus. Remodeling stages are based on the maximum number of observable generations of crosscutting osteons from the innermost, mid-, and outermost part of the cortex. The correlation with CFL indicates that secondary osteons present an ontogenetic signal that could extend the histological ontogenetic stages. Remodeling stages also provide additional insight into the changes in histology through ontogeny for Sauropoda. This method has the potential to be used in other taxa, such as thyreophorans and many ornithischians, that develop Haversian tissue through development.
登录
查看更多内容
衰老对骨重塑的影响
DOI：
--
发表时间：
1975
期刊：
Calcified Tissue Research
影响因子：
--
作者：
D. Ortner
通讯作者：
D. Ortner
影响因子：
3.7
作者：
Klein N;Sander PM;Stein K;Le Loeuff J;Carballido JL;Buffetaut E
通讯作者：
Buffetaut E
简短交流：骨重塑率：对估计缺失骨的算法的测试。
影响因子：
2.8
作者：
S. Stout;R. Paine
通讯作者：
R. Paine
用于亚成人肋骨皮质的死亡年龄估计的四阶段方法 *,†
影响因子：
1.6
作者：
M. Streeter
通讯作者：
M. Streeter
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