Abstract
The first electron-microscopic investigation of silica-scaled chrysophytes in water bodies of the protected area Kurgalsky Nature Reserve located in the North-West of European Russia has resulted in the discovery of two species that are new for the Russian flora, Mallomonas favosa and M. teres. Mallomonas teres is reported for the first time since its original descriptions. In addition, Paraphysomonas cf. ovalis and an unknown species of Mallomonas were observed. Descriptions, original photos, and habitat features of these four species are given.
Highlights
Two species of silica-scaled chrysophytes, Mallomonas favosa and M. teres, are reported for the first time for Russia
This study is a continuation of our previous studies of chrysophytes by EM in protected areas of the North-West of Russia (Safronova, 2011; Saf ronova, Voloshko, 2013)
Ecology: Mallomonas teres was found in small peat-bog pools with pH from 5.1 to 7.3, conductivity from 20 to 43 μS/cm, and a water temperature about 7 ̊C (Němcová, Kapustin, 2019; our data)
Summary
Results Two species of silica-scaled chrysophytes, Mallomonas favosa and M. teres, are reported for the first time for Russia. Body scales with pit at base of submarginal rib. In the type material of this species, body scales have only one large circular or irregular shaped pit containing a pore in the angle of submarginal rib (Nicholls, 1984).
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