New additions to Luxembourg’ s fen fly (Diptera: Syrphidae, Neoascia) fauna

New species records are valuable in informing conservation management and prioritising conservation measures, especially if the newly identified species are in peril. Here, we publish the first records of three hoverfly species of the genus Neoascia for Luxembourg, namely Neoascia obliqua Coe, 1940, Neoascia unifasciata (Strobl, 1898) and Neoascia interrupta (Meigen, 1822). Neoascia unifasciata is threatened with extinction, being listed as Endangered by the European Red List of hoverflies and the IUCN Red List of Threatened Species. Therefore, a conservation action plan has been developed for this species, which is now being implemented to preserve the populations of this hoverfly in Luxembourg and its habitats, which are stands of Petasites hybridus.