Involucropyrenium altimontanum is described as new from an alpine site in the National Park Hohe Tauern in the Austrian Alps, where it was found growing on soil and plant debris. It is characterized by a small squamulous thallus, perithecia with an involucrellum that completely encircles the exciple and small ellipsoidal ascospores. Key words: Lichenized Ascomycota, Verrucariaceae, Involucropyrenium, taxonomy, sp. nov., 1 new species. ‒ Alpine lichens, mycoflora of Austria.