The unknown natural habitat of Rosalia alpina (L.) (Coleoptera: Cerambycidae) and its trophic association with the mountain elm Ulmus glabra in Poland - a change of habitat and host plant

A unique natural habitat of Rosalia alpina (L.) located in the Beskid Niski mountain range (Carpathians) and consisting of a forest clearing community in the stage of succession with the mountain elm Ulmus glabra, in part dying and dead, is described. Results of the laboratory rearing of this longhorn beetle from elm wood as well as field observations of its adults in this natural habitat are given. This habitat and trophic association of R. alpina with U. glabra are discussed in connection with the known trophic relations of this insect species with host plants of the genus Ulmus.