New data on the distribution of the threatened Marsh Fritillary – Euphydryas aurinia (Lepidoptera: Nymphalidae) – in Romania

Euphydryas aurinia, a highly endangered species listed on the Annex II of the Habitats Directive as well as on the Annex II of the Bern Convention, has a wide distribution in the Palearctic realm. Although it is an intensively studied species, its distribution is still not enough known. In Romania, in the last century it has been reported almost exclusively from the regions inside and westwards to the Carpathian Mountains. Records from Oltenia and Wallachia are filling a gap in the known distribution of this butterfly in the southern part of Romania, while 13 new records consolidate the known range of this species in southern and eastern Transylvania. In order to assess the progress encountered, a critical reviewed checklist with the records of the Marsh Fritillary presented in a regional distribution map complete this paper.