Scales and spines of silica-scaled chrysophytes of the genera Chrysosphaerella, Paraphysomonas, Spiniferomonas and Mallomonas; a – Chrysosphaerella baicalensis (Temnik River, station 3), b, c – Paraphysomonas acuminata acuminata (Chikoy River, station 2), d – Paraphysomonas vulgaris (Temnik River, station 3), e – Clathromonas sp. (mouth of the Barguzin River, station 6), f – Spiniferomonas serrata (mouth of the Kharauz Creek, station 5), g – Spiniferomonas trioralis (Chikoy River, station 2), h – Spiniferomonas cornuta (mouth of the Barguzin River, station 6), i Mallomonas trummensis (mouth of the Barguzin River, station 6), j – Mallomonas akrokomos (Dzhida River, station 1), k – Mallomonas alpina (Temnik River, station 3), l – Mallomonas tonsurata (Temnik River, station 3). Micrographs were obtained with scanning electron microscopy (f–h) or transmission electron microscopy (a–e, i–l). Scale bars are: 0.5 µm (e), 1 µm (a–d, f–l).