The conspecificity of Aulacoseira konstantinovii and Praecyclostephanos boengchhmariensis with comments on the genus Praecyclostephanos

Abstract

The centric diatom species Aulacoseira konstantinovii was described from Lake Tonlé Sap (Cambodia) but was erroneously assigned to the genus Aulacoseira. Subsequently, based on a unique set of morphological characters, the genus Praecyclostephanos with the single species P. boengchmariensis was established based on the material from this lake. Examination of published data has allowed us to compare the morphology of A. konstantinovii and P. boengchmariensis and confirm their conspecificity. A new combination, Praecyclostephanos konstantinovii comb. nov., is therefore proposed.

Keywords:

• Aulacoseira
• Praecyclostephanos
• centric diatoms
• morphology
• systematics
• taxonomy
• Southeast Asia

Acknowledgements

The work of S.I. Genkal was carried out within the institutional research project ‘Diversity, Structure and Functioning of Algal and Plant Communities in Continental Waters’ (No. 121051100099-5) of the Papanin Institute for Biology of Inland Waters RAS. The work of A.M. Glushchenko was carried out within the state assignment of Ministry of Science and Higher Education of the Russian Federation (theme No. 122042700045-3). The work of M.A. Gololobova was carried out as part of the Scientific Project of the State Order of the Government of Russian Federation to Lomonosov Moscow State University (No. 121032300080-0). We are very grateful to two anonymous reviewers for constructive and helpful comments, to Loïc Tudesque for permission to use micrographs of Praecyclostephanos boengchmariensis, and Nicholas Turland for his explanations concerning nomenclature and the Code. We are also very grateful to Eileen J. Cox for editing and linguistic corrections to the manuscript.

Disclosure statement

No potential conflict of interest was reported by the author(s).

Additional information

Funding

This work was supported by Ministry of Science and Higher Education of the Russian Federation: [Theme Number 122042700045-3]; Scientific Project of Lomonosov Moscow State University: [Theme Number 121032300080-0]; Papanin Institute for Biology of Inland Waters RAS.: [Theme Number No. 121051100099-5].