Tseplik, N., Maltsev, Y., Glushchenko, A., Genkal, S., & Kulikovskiy, M. (2024). Two new Planothidium (Achnanthidiaceae, Bacillariophyceae) species with a sinus from the Kamchatka Peninsula, Russia. Phytotaxa, 664(2), 111–122. https://doi.org/10.11646/phytotaxa.664.2.3