Anker, Arthur
Ivanov, Yury
Article History
Received: 4 December 2019
Revised: 3 February 2020
Accepted: 6 February 2020
First Online: 17 March 2020
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: The present article does not involve collecting and preservation of animals. A single specimen used for comparative purposes was collected in 2012, respecting all national and international regulations (see Acknowledgements above).
: The authors did not use publicly archived datasets for this study. The present study is essentially a synthesis of the second author’s in situ observations and a literature survey. A short video supporting the above observations is available on the journal’s repository as InternalRef removed.
: The present study is largely based on in situ observations by YI, followed by an exhaustive literature review by AA. AA conceived and wrote the manuscript, which was read and approved by YI.