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中国四川省峨眉山特有小鲵类(两栖纲,有尾目)龙洞山溪鲵(Batrachuperus londongensis Liu and Tian,1978)正模标本骨骼μCT三维数据集

Dataset of μCT scan of the holotype specimen of Batrachuperus londongensis Liu and Tian, 1978, an endemic hynobiid(Amphibia, Urodela) from Mount Emei, Sichuan Province, China

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【作者】 贾佳张美华高克勤江建平

【Author】 Jia Jia;Zhang Meihua;Gao Keqin;Jiang Jianping;School of Earth and Space Sciences,Peking University;Key Laboratory of Economic Stratigraphy and Palaeontology,Chinese Academy of Sciences,Nanjing Institute of Geology and Palaeontology;Chengdu Institute of Biology,Chinese Academy of Sciences;

【通讯作者】 贾佳;

【机构】 北京大学地球与空间科学学院中国科学院资源地层学与古地理学重点实验室中国科学院南京地质古生物研究所中国科学院成都生物研究所

【摘要】 小鲵科蝾螈类是有尾两栖类的一个原始类群,对了解蝾螈类的早期演化具有重要意义。由于该科化石稀少、对现存属种骨骼形态研究不足、基于分子数据的分支分析结果不一致以及缺少利用形态特征构建分支演化树的原因,该科在起源、某些特征演化和内部谱系关系存在诸多分歧。龙洞山溪鲵生活于中国四川峨眉山龙洞河,是现存小鲵类中唯一具有兼性童体型的蝾螈。该属种自发现至今已有40年,然而未有对其骨骼系统的详细研究。本文利用中国科学院成都生物研究所高精度CT扫描成像系统(Quantum GX microCT Imaging System)对龙洞山溪鲵的正模标本(CIB 14380)进行了分段扫描,所得分辨率在67.1~144μm之间。扫描结果揭示出童体型的多个特殊形态特征,如舌器骨化程度较高、腕骨和跗骨完全骨化。这是μCT扫描技术在中国现存小鲵类形态研究中的首次应用。本数据集包括正模标本的μCT扫描原始数据、扫描参数、头骨和全身骨骼的三维重建图和视频、头部的3D pdf和可用于3D打印的stl文件。扫描所获取的骨骼结构在任意截面上轮廓清晰可辨,读者可利用常用三维软件,如VG Studio读取并使用该数据。以上文件的共享为相关科研人员提供了可供参照对比的原始数据,对小鲵科我国特有属种的形态学研究具有一定价值。

【Abstract】 As a primitive clade of tailed amphibians, hynobiids are significant in understanding the early evolutionary history of salamanders. However, no consensus has been reached in regard to the time and location of origin, evolutionary history of certain characters, and phylogenetic relationships of Hynobiidae, due to several factors including: poor fossil records, insufficient morphological investigations of living taxa, inconsistent results of cladistic analyses using molecular data, and lack of morphology-based phylogenetic analyses. Batrachuperus londongensis, living in the Longdong River area at Mount Emei, Sichuan Province, China, features as the single living hynobiid species that is facultatively neotenic. Despite that the species has been known to scientific community for 40 years, its osteology has not been thoroughly investigated. This paper provides the technical procedures of employing high resolution CT scan(μCT) technique in investigating the osteology of the holotype(CIB 14380) of Batrachuperus londongensis. μCT scan of the holotype specimen(CIB 14380) of B. londongensis was completed using the Quantum GX microCT Imaging System at Chengdu Institute of Biology, Chinese Academy of Sciences. The voxel size derived from these scans ranges between 67.1–144 μm. Several distinctive osteological traits characterizing the neotenic individuals of B. londongensis were revealed, such as the highly ossified hyobranchial apparatus and wholly ossified carpals and tarsals in the limb. This study represents the first attempt of applying μCT scanning techniques in the osteological research of living hynobiids endemic in China. The dataset includes μCT source data of the holotype and associated parameter files; reconstructed images and videos displaying the cranial part and the whole skeleton; and a 3 D pdf and 3 D printable stl files for the cranial part of the holotype. The source data files created from the μCT scan display a clear outline of the skeleton and can be easily read by software, like VG Studio. This dataset benefits researchers and the public interested in the osteology of the facultatively neotenic Batrachuperus londongensis, and is valuable for investigating the morphology of hynobiids endemic in China.

【基金】 中国国家自然科学基金(41702002、41072007、41272016;中国科学院资源地层学与古地理学重点实验室(中国科学院南京地质古生物研究所)开放基金(2017KF03);国家重点研发计划项目(2017YFC0505202)~~
  • 【文献出处】 中国科学数据(中英文网络版) ,China Scientific Data , 编辑部邮箱 ,2018年02期
  • 【分类号】Q959
  • 【下载频次】104
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