Journal of Micropalaeontology
Journal of Micropalaeontology
JM
Articles | Volume 44, issue 2
Articles | Volume 44, issue 2
https://doi.org/10.5194/jm-44-653-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/jm-44-653-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 44, issue 2
Research article
 | 
08 Dec 2025
Research article |  | 08 Dec 2025

Taxonomy, systematics, and valve ultrastructure of the Rhopalodiales (Bacillariophyta: Bacillariophyceae) taxa from Swan Lake, Oregon, and a checklist of the group in the USA

John P. Kociolek, Megan Greenwood, Aimee Caye G. Chang, Sarah E. Hamsher, Scott R. Miller, and Jingchun Li

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Short summary
We re-investigated a fossil diatom locality that has been reported to have the highest species diversity of Rhopalodiales, a group of diatoms that possess endosymbiotic blue-green algae.  This report came from 1910, and we used original and additional material to investigate the species present.  We found species there that are new to science but also found that some species previously reported could not be found.  
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