Winnertzia nigripennis Kieffer 1896

Winnertzia nigripennis Kieffer, 1896 Morphological identification Jaschhof & Jaschhof (2013, 2020b). Winnertzia nigripennis is one of several species with generally similar male morphology. While a taxonomic study of Winnertzia in Sweden had revealed three presumably unnamed nigripennis - like species (Jaschhof & Jaschhof 2020b), results obtained in the present project suggest the presence of 11 discrete sibling species solely in southern Germany, which can be separated by both morphological and molecular characters. These species, of which several are represented by singletons only, are labeled here W. sp. MJDE2 (BIN BOLD:ACU9822), W. sp. MJDE31 (BIN BOLD:ACR3885), W. sp. MJDE32 (BIN BOLD:AER2249), W. sp. MJDE33 (BIN BOLD:AER2254), W. sp. MJDE34 (BIN BOLD:AER2259), W. sp. MJDE35 (BIN BOLD:AER2267), W. sp. MJDE36 (BIN BOLD:AER2255), W. sp. MJDE37 (BIN BOLD:ADD4411), W. sp. MJDE38 (BIN BOLD:AER2291), W. sp. MJDE39 (BIN BOLD:AER2290), and W. sp. MJDE58 (BIN BOLD:AEX7527). To resolve this complex taxonomic situation sets a further task for Winnertzia revisions in the future. DNA barcode CO1 sequences (632‒652bp) were obtained of the four specimens detailed below and allocated to two different BINs: BOLD:AER2256 (ZSM-DIP-42309-H09) and BOLD:ACJ3412 (ZSM-DIP-42308-H10, ZSM-DIP-42309-H07, ZSM-DIP-42309-H08). Reexamination of the respective physical specimens did not reveal clear morphological differences between the two genetic clusters. A search in BOLDʼs BIN Database retrieved a further four matches for BOLD:ACJ3412, as Cecidomyiidae sp. from Rhineland-Palatinate and Bavaria, Germany (three matches) and Winnertzia nigripennis from an unknown country (mined from GenBank) (accessed 26 Aug. 2023). Material examined GERMANY ‒ Bavaria • 1 ♂; Weilheim, Pähl, Hartschimmelhof; 47°93′87″ N, 11°18′63″ E; 20 Jun.‒12 Jul. 2020; D. Doczkal and K. Grabow leg; Malaise trap; nutrient-poor meadow; BOLD GBDTA10449-21; ZSM-DIP-42308-H10 • 1 ♂; Swabia, Esterholz; 48°64′17″ N, 11°01′88″ E; elev. 485 m; 15 Jul. 2019; LandKlif and J. Müller leg.; Malaise trap; BOLD GBDTA10541-21; ZSM-DIP-42309-H07 • 1 ♂; same data as for preceding; BOLD GBDTA10542-21; ZSM-DIP-42309-H08 • 1 ♂; same data as for preceding; BOLD GBDTA10543-21; ZSM-DIP-42309-H09. Distribution Germany (new record); widespread in Europe, South Korea, possibly USA (Pennsylvania) (Gagné & Jaschhof 2021).