Melanostoma certum Haarto & Ståhls, 2014

Heimburg, Helge, Doczkal, Dieter & Holzinger, Werner E., 2022, A checklist of the hoverflies (Diptera: Syrphidae) of Austria, Zootaxa 5115 (2), pp. 151-209 : 175

Melanostoma certum Haarto & Ståhls, 2014

Notes. Reported from: Vorarlberg (VB). M. certum belongs to the Melanostoma mellinum species complex and was reported recently by Aistleitner et al. (2020) for Austria. Older records of this complex were published by Franz (1989) presumably under the name M. dubium . Probably several cryptic species are hidden within the M. mellinum complex (Dieter Doczkal unpublished data). We delete this species from the checklist, as we believe that the species concept of Haarto & Ståhls (2014) cannot be applied to the entire European region, especially not for the Alpine region (see the section ‘Further remarks on species records: Melanostoma mellinum ’). Further molecular studies are necessary to clarify this species complex (see also Speight (2020).