https://orcid.org/0000-0001-9824-7164
![Sample our Environment & Agriculture journals, sign in here to start your access, latest two full volumes FREE to you for 14 days]({"type":"image" , "src" : "/sda/5934/TOC-Subject-Sample-2021-Environment-Agriculture.jpg"})
ABSTRACT
The morphological diversity in the genus Surirella is summarized, a new Surirella species is described, and the valve ultrastructure of S. undulata is documented under the scanning electron microscope. The new species, Surirella dongtingensis sp. nov., has a moderately twisted frustule with open valvocopula. Under the light microscope the frustule has one valve that is twisted at one apex, and the second valve is rotated 180 degrees compared to the first, such that one with the left side of one apex is not in the same focal plane with the three other sides, and the second is that the right side of one apex is not in the same focal plane with the three other sides. With respect to the valvocopula, the pars exterior bears oblique striae and scattered warts, and the pars interior have parallel striae and fimbriate ad-valve margins. Internally, both pars exterior and interior are smooth. Two nomenclatural changes for Cymatopleura aquastudia Kociolek & Q.You and C. xinjiangiana Q.You & Kociolek are provided to account for species to align with current concepts of the genus Surirella.
Acknowledgments
We are grateful to Dr. Xin Yang of Huaihua University for his help with SEM operation and photography.
Disclosure statement
No potential conflict of interest was reported by the authors.
Additional information
Funding
Notes on contributors
Bing Liu
Bing Liu original concept, material collection and processing, microscopic analyses, writing the manuscript.
J. Patrick Kociolek
J. Patrick Kociolek writing of the discussion, contribution of useful information, critical reading, revision and edition of the manuscript.
Luc Ector
Luc Ector provision of literature, discussion of results, development, revision and editing of manuscript.