An adventive Panaeolus antillarum in Poland (Basidiomycota, Agaricales) with notes on its taxonomy, geographical distribution, and ecology

Coprophilous fungus, Panaeolus antillarum rarely recorded in Europe, is reported here for the first time from the Augustów Plane, north-eastern Poland. This thermophilic species was found outdoors in August on horse dung mixed with straw. A chemical analysis did not confirm the presence of the psychoactive alkaloids in collected material. A complete description and illustration of the species based on Polish specimens are presented and notes on its taxonomy, ecology, world distribution and comparison with similar taxa - P. semiovatus var. semiovatus, P. semiovatus var. phalaenarum, and others are also provided.