An updated checklist of the European Butterflies (Lepidoptera, Papilionoidea)
Article in ZooKeys · December 2018
DOI: 10.3897/zookeys.811.28712

Melitaea celadussa Fruhstorfer, 1910 is considered a separate species distributed in western Europe that differs in genital morphology (Higgins 1932) and molecular markers (Leneveu et al. 2009, Dincă et al. 2015) from M. athalia, with hybrids known from the contact zone (Achtelik 2006; Oorschot and Coutsis 2014). The species was referred to also as M. nevadensis Oberthür, 1904, which is a junior primary homonym of Melitaea parthenie var. nevadensis Spuler, 1901, currently regarded as a junior subjective synonym of Melitaea parthenoides Keferstein, 1851.