古脊椎动物学报2019，Vol.57Issue(3)：205-213,9.DOI:10.19615/j.cnki.1000-3118.190425
张氏西峡爪龙(兽脚类:阿尔瓦雷斯龙类)第二跖骨的骨组织学及其对“窄足型”足部结构发育的启示
Metatarsal Ⅱ osteohistology of Xixianykus zhangi (Theropoda: Alvarezsauria) and its implications for the development of the arctometatarsalian pes
摘要
Abstract
The late-branching alvarezsaurian Xixianykus zhangi is among the smallest known non-avialan theropods.With great similarity to its close relatives,it is highly cursorial as indicated by proportionally long lower segments of the hindlimbs and the presence of an arctometatarsalian pes-a highly modified structure that has been suggested to improve cursorial capability in theropods.Here we describe the osteohistology of the metatarsal Ⅱ of the holotype of X.zhangi (XMDFEC V 0011).Two rarely reported histological features,radial vascular canals and Sharpey's fibers,are presented in this study.We suggest that both features are related to the development of the arctometatarsalian pes;however,further investigations of metatarsal osteohistology in theropods are required for the validation of our interpretation.关键词
河南省/晚白垩世/阿尔瓦雷斯龙类/骨组织学/窄足型足部/放射状骨脉管/沙比纤维Key words
Henan/Late Cretaceous/alvarezsaurian/osteohistology/arctometatarsalian/radial vascular canals/Sharpey's fibers分类
生物科学引用本文复制引用
秦子川,赵祺,徐星..张氏西峡爪龙(兽脚类:阿尔瓦雷斯龙类)第二跖骨的骨组织学及其对“窄足型”足部结构发育的启示[J].古脊椎动物学报,2019,57(3):205-213,9.基金项目
国家自然科学基金(批准号:41688103,41120124002)资助.We thank Ding Xiaoqing for preparing specimens,Zhang Shukang for guidance of manufacturing histological slices,and Chen Guanhan for photographs.We thank P.Martin Sander from University of Bonn for the discussion.We thank Alida Bailleul for the discussion and her comments on the manuscript.This study was supported by the National Natural Science Foundation of China (41688103 and 41120124002). （批准号:41688103,41120124002）
