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Vertebrata Palasiatica ›› 2021, Vol. 59 ›› Issue (2): 81-94.DOI: 10.19615/j.cnki.1000-3118.201124

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A new pteranodontoid pterosaur forelimb from the upper Yixian Formation, with a revision of Yixianopterus jingangshanensis

JIANG Shun-Xing1,2(), ZHANG Xin-Jun1,2,3, CHENG Xin4,5, WANG Xiao-Lin1,2,3   

  1. 1 Key Laboratory of Vertebrate Evolution and Human Origins of Chinese Academy of Sciences, Institute of Vertebrate Paleontology and Paleoanthropology, Chinese Academy of Sciences Beijing 100044, China
    2 CAS Center for Excellence in Life and Paleoenvironment Beijing 100044, China
    3 College of Earth and Planetary Sciences, University of Chinese Academy of Sciences Beijing 100049, China
    4 Laboratório de Paleontologia da URCA, Universidade Regional do Cariri Crato 63100-000, Brazil
    5 College of Earth Sciences, Jilin University Changchun 130061, China
  • Received:2020-09-07 Online:2021-05-20 Published:2021-04-20


蒋顺兴1,2(), 张鑫俊1,2,3, 程心4,5, 汪筱林1,2,3   

  1. 1 中国科学院古脊椎动物与古人类研究所,中国科学院脊椎动物演化与人类起源重点实验室 北京 100044
    2 中国科学院生物演化与环境卓越创新中心 北京 100044
    3 中国科学院大学地球与行星科学学院 北京 100049
    4 巴西卡里里地区大学古生物实验室 克拉图 63100-000
    5 吉林大学地球科学学院 长春 130061
  • 通讯作者: jiangshunxing@ivpp.ac.cn
  • 基金资助:


Pterosaurs in the Jehol Biota have been found in the Yixian and Jiufotang formations. The Jingangshan bedding is in the upper part of the Yixian Formation. The first two pterosaur embryos ever discovered in the world, two archaeopterodactyloid specimens, and the questionable Yixianopterus jingangshanensis have been reported in previous literature. Here, we describe a forelimb from this horizon and confirm its phylogenetic position in the Pteranodontoidea. The holotype of Y. jingangshanensis, now housed at Benxi Geological Museum, has been examined. The diagnosis of this taxon has been revised without the consideration of the artificial parts as following, a pteranodontoid pterosaur with a distinguished combination of characters: triangular and labiolingually compressed teeth with the first two more slender and longer than the others; teeth vertical to the occlusal surface; the second wing phalanx about 93% the length of the first wing phalanx. In the Jehol Biota, archaeopterodactyloid specimens have been mainly discovered from the Yixian Formation, while tapejaroids are almost found from the Jiufotang Formation. Including the new forelimb and Y. jingangshanensis, the pteranodontoids from the Jiufotang Formation are slightly greater in number than those from the Yixian Formation in species and specimens, differing from the previous thoughts on the distribution.

Key words: western Liaoning, Early Cretaceous, Jehol Biota, Jingangshan bedding, Pteranodontoidea, Yixianopterus



关键词: 辽西, 早白垩世, 热河生物群, 金刚山层, 无齿翼龙超科, 义县翼龙

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