Psammophilous Ephemeroptera and Plecoptera in Hungary

Hungarian locality data of psammophilous species of Ephemeroptera (Ametropus fragilis, Cercobrachys minutus, Procloeon macronyx, Pseudocentroptiloides nana) and Plecoptera (Isoptena serricornis) are summarized and mapped, with comments on threats of the species and their habitats. With one figure.