Three species of the genus Chrysomyxa, C. abietis, C. empetri, and C. ledi, and one species of the genus Rossmanomyces, R. pyrolae, have been reported in Ukraine. During the 20th century, they were sporadically recorded in the western part of Ukraine; however, there is no data on their findings in this part of the country in the 21st century. Mycological studies carried out since 2019 in various regions of Ukrainian Polissya have not revealed any of these rust fungi. Obviously, species of both genera are either very rare or completely extinct in Ukraine today. The article is illustrated by micrographs obtained by scanning electron microscopy.

Keywords: biodiversity, distribution, morphology, rust fungi, scanning electron microscopy

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