Kociolek, J. P., & Khursevich, G. K. (2013). Morphology of some fossil lacustrine centric species from the western United States assigned to the genus Cyclotella (Bacillariophyta), including four described as new. Phytotaxa, 127(1), 81–99. https://doi.org/10.11646/phytotaxa.127.1.11