Previously known from only two collections from Japan, Artomyces microsporus has been repeatedly collected in a forest near Kiev (Ukraine). The identification of these collections has been confirmed by sequence analysis of the nuclear ribosomal internal transcribed spacer region (nrITS). The specimens are described and a comparison with A. pyxidatus is given. Data concerning the genus Artomyces in Ukraine have been checked; herbarium specimens have been revised and literature has been screened. All the collected data may be referred to A. pyxidatus, except the collections of A. microsporus presented here.