Corticioid fungi constitute a heterogeneous group in terms of origin; they belong to various orders of Agaricomycetes (Basidiomycota). According to the available data, ca 280 species of this group have been so far recorded in Ukraine. As compared to other countries of Europe, diversity of corticioid fungi in Ukraine has been insufficiently studied. We made observations and collected corticioid fungi in June–October, 2016 and in March–October, 2017 in forests and woods of Ichnia National Nature Park (Ichnia District, Chernihiv Region, Ukraine). Upon identification of the herbarium specimens collected over the study area, we recorded 90 species of corticioid fungi. This article reports three noteworthy records of corticioid fungi. Two species, Amylocorticium canadense and Tubulicrinis glebulosus, are new records for Ukraine; another one, Aleurodiscus dextrinoideocerussatus, is a rare species both in Ukraine and globally, collected in our country for the second time, and a new record for the Forest-Steppe zone. The specimens were examined in 5% aqueous potassium hydroxide solution, Melzer's reagent and Lactophenol cotton blue. For all the species, we provide descriptions of the examined specimens, along with the original photos, substrate specialization and global distribution details. The collected specimens are deposited in the Mycological Herbarium of the M.G. Kholodny Institute of Botany, National Academy of Sciences of Ukraine (KW-M).
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