Funding for this research was provided by:
National Natural Science Foundation of China (41502016)
State Key Laboratory of Palaeobiology and Stratigraphy (143111)
Yunnan Key Laboratory for Palaeobiology, Yunnan University (2015DG007-ZZ02)
Science & Technology Department of Yunnan Province (2014FD005)
Article History
Received: 19 September 2017
Accepted: 11 December 2018
First Online: 4 February 2019
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.