尾椎形态的变化是否与变色龙的栖息地使用有关？,Journal of Morphology

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尾椎形态的变化是否与变色龙的栖息地使用有关？
Journal of Morphology ( IF 1.5 ) Pub Date : 2019-12-28 , DOI: 10.1002/jmor.21093
Allison M. Luger ₁ , Anouk Ollevier ₁ , Barbara De Kegel ₁ , Anthony Herrel _{1,

2} , Dominique Adriaens ₁

Affiliation

变色龙（Chamaeleonidae）以其树栖生活方式而闻名，在这种生活方式中，他们利用自己的尾巴。然而，有些物种有更多的陆生生活方式，例如 Brookesia 和 Rieppeleon 物种，以及一些 Chamaeleo 和 Bradypodion 属的变色龙。本研究的主要目标是确定与抓握能力相关的尾椎形态的关键解剖特征。研究了骨骼尾形态的种间和个体内变异。为此，使用不同种类的可握和非可握尾变色龙的 μCT 图像对椎骨形态进行了 3D 形状分析。可抓握和非抓握分类群之间确实存在总体尾部大小和尾椎形态的差异。非抓握尾物种的尾巴较短，椎骨较少，神经棘通常较短，横突更靠前（相对于椎骨中心）。抓握物种较长的尾巴具有更多的椎骨以及增加的过程长度，可能为肌肉附着提供更大的区域。在个体内部，观察到区域差异，具有更长突起的更健壮的近尾椎骨。远端具有相对较长的椎骨和较短的突起。虽然更长，但远端椎骨的小尺寸和高数量允许尾巴盘绕在栖息处。抓握物种较长的尾巴具有更多的椎骨以及增加的过程长度，可能为肌肉附着提供更大的区域。在个体内部，观察到区域差异，具有更长突起的更健壮的近尾椎骨。远端具有相对较长的椎骨和较短的突起。虽然更长，但远端椎骨的小尺寸和高数量允许尾巴盘绕在栖息处。抓握物种较长的尾巴具有更多的椎骨以及增加的过程长度，可能为肌肉附着提供更大的区域。在个体内部，观察到区域差异，具有更长突起的更健壮的近尾椎骨。远端具有相对较长的椎骨和较短的突起。虽然更长，但远端椎骨的小尺寸和高数量允许尾巴盘绕在栖息处。

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Is variation in tail vertebral morphology linked to habitat use in chameleons?

Chameleons (Chamaeleonidae) are known for their arboreal lifestyle, in which they make use of their prehensile tail. Yet, some species have a more terrestrial lifestyle, such as Brookesia and Rieppeleon species, as well as some chameleons of the genera Chamaeleo and Bradypodion. The main goal of this study was to identify the key anatomical features of the tail vertebral morphology associated with prehensile capacity. Both interspecific and intra‐individual variation in skeletal tail morphology was investigated. For this, a 3D‐shape analysis was performed on vertebral morphology using μCT‐images of different species of prehensile and nonprehensile tailed chameleons. A difference in overall tail size and caudal vertebral morphology does exist between prehensile and nonprehensile taxa. Nonprehensile tailed species have a shorter tail with fewer vertebrae, a generally shorter neural spine and shorter transverse processes that are positioned more anteriorly (with respect to the vertebral center). The longer tails of prehensile species have more vertebrae as well as an increased length of the processes, likely providing a greater area for muscle attachment. At the intra‐individual level, regional variation is observed with more robust proximal tail vertebrae having longer processes. The distal part has relatively longer vertebrae with shorter processes. Although longer, the small size and high number of the distal vertebrae allows the tail to coil around perches.

更新日期：2019-12-28

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