The first record of Wormian bones in lizards

IF 0.8 4区 生物学 Q3 ZOOLOGY African Journal of Herpetology Pub Date : 2018-02-20 DOI:10.1080/21564574.2017.1402094
L. Rudie, Patrick J. Lewis
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引用次数: 3

Abstract

ABSTRACT Wormian bones are accessory bones found between cranial elements. These rare bones vary greatly in size, shape and placement. Wormian bones are well-known in mammals, notably in humans and chimpanzees, but not in lizards. Here we examine the genus Zygaspis, a southern African amphisbaenian with complex cranial sutures, for the presence of Wormian bones. Skulls from seven of the eight species of Zygaspis were examined for the presence of Wormian bones. Because of their small size, complex sutures and delicate nature, high-resolution X-ray computed tomography was used to produce 3D models of the skulls. We discovered three Wormian bones in the interdigitated frontoparietal suture of Z. kafuensis. This discovery is the first known record of Wormian bones in a lizard and it is one of the few reports of them in the Squamata. The presence of Wormian bones in a head-first, burrowing squamate allows for a possible functional role to be hypothesised. Additional studies on a variety of squamate taxa are now needed, particularly in burrowing groups with interdigitated sutures, to improve our understanding of these rare cranial elements.
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第一个在蜥蜴身上发现虫骨的记录
沃米安骨是发现于颅骨元素之间的附属骨骼。这些罕见的骨头在大小、形状和位置上都有很大的差异。Wormian骨骼在哺乳动物中很常见,尤其是在人类和黑猩猩中,但在蜥蜴中则不然。在这里,我们检查了Zygaspis属,一种具有复杂颅骨缝合线的南非两栖动物,是否存在Wormian骨骼。对八种Zygaspis中的七种的头骨进行了Wormian骨骼的检查。由于它们体积小、缝合复杂、性质细腻,高分辨率X射线计算机断层扫描被用于制作头骨的3D模型。我们在卡氏Z.kafuensis的额顶叉缝中发现了三块Wormian骨头。这一发现是已知的第一个蜥蜴Wormian骨骼的记录,也是Squamata为数不多的关于它们的报告之一。Wormian骨头存在于一只头部优先、洞穴化的乳鸽中,这使得人们可以假设其可能的功能作用。现在需要对各种鳞片分类群进行更多的研究,特别是在具有叉指缝合线的洞穴群中,以提高我们对这些罕见颅骨元素的理解。
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来源期刊
CiteScore
3.00
自引率
6.70%
发文量
15
审稿时长
>12 weeks
期刊介绍: African Journal of Herpetology (AJH) serves as an outlet for original research on the biology of African amphibians and reptiles. AJH is an interdisciplinary journal that publishes original articles and reviews from diverse fields and disciplines, such as conservation, phylogenetics, evolution, systematics, performance, physiology, ecology, behavioural ecology, ethology, and morphology. The Journal publishes two issues a year. There are no page charges .
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