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