Five new <i>Graphium</i> species from hardwood trees in Poland

<i>Graphium</i> species form a well-supported monophyletic lineage within the Microascales (Ascomycota). Members of this genus can be found in association with bark beetles, as well as on tree wounds and in soils. During surveys of bark and ambrosia beetle–associated fungi and cavities made by woodpeckers on hardwood trees in Poland, many isolates with an affinity to <i>Graphium</i> were recovered. They were identified based on their morphological characters and sequence data for the internal transcribed spacer (ITS), 28S rDNA, β-tubulin (<i>TUB2</i>), and translation elongation factor 1-α (<i>TEF1</i>) gene regions. The results revealed five new species, described here as <i>G. brachiatum, G. longistipitatum, G. polonicum, G. radicatum</i>, and <i>G. trypophloei</i>.