Journal of Earth Science

, Volume 29, Issue 2, pp 237–244 | Cite as

Permineralized Calamitean Axes from the Upper Permian of Xinjiang, Northwest China and Its Paleoecological Implication

  • Fayao Chen
  • Xiao Shi
  • Jianxin Yu
  • Hongfei Chi
  • Jun Zhu
  • Hui Li
  • Cheng Huang


Two anatomically preserved calamitean axes are reported for the first time from the Late Permian Wutonggou Formation in the southern Bogda Mountains, Xinjiang Uygur Autonomous Region, Northwest China. Based on the anatomical features, these axes are assigned to Arthropitys. A new species Arthropitys taoshuyuanensis sp. nov. is established. A. taoshuyuanensis sp. nov. possesses a large pith and comprises large pith cavity and a narrow perimedullary zone at the nodes and diaphragms at the internodes. Carinal canals are circular and surrounded by a single layer of metaxylem tracheids. Secondary xylem is divided into interfascicular rays and fascicular wedges. Interfascicular rays are initially four to five cells wide and taper abruptly centrifugally. Fascicular wedge consists of thick-walled tracheids and thin-walled fascicular ray cells. Radial tracheid walls have uniseriate or biseriate circular pits, or scalariform pits. The absence of growth rings in the Arthropitys specimens indicates that they probably lived in the wetland area under stable annual temperature and water sufficient conditions.

Key words

Arthropitys calamitean horsetail Late Permian Xinjiang 


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We gratefully acknowledge the anonymous reviewers for their critical comments and constructive suggestions, which have improved the quality of the paper greatly. We also thank Prof. Shucheng Xie from China University of Geosciences and Ms. Qingting Wu from Ohio State University for collecting the samples. This study was supported by the National Natural Science Foundation of China (Nos. 40972002, 41272024 and 41572005). The final publication is available at Springer via

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Copyright information

© China University of Geosciences and Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  1. 1.State Key Laboratory of Biogeology and Environmental Geology, School of Earth SciencesChina University of GeosciencesWuhanChina
  2. 2.College of Earth SciencesJilin UniversityChangchunChina
  3. 3.Key-Lab for Evolution of Past Life and Environment in Northeast Asia, Ministry of EducationJilin UniversityChangchunChina

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