Large-scale integrative taxonomy of Swedish grass flies (Diptera, Chloropidae) reveals hitherto unknown complexity of a dark taxon Riccardi, Paula Raile Hartop, Emily Zoologica Scripta 2024 2024-05-20 53 5 614 631 YBF Duda, 1932 Duda 1932 [346,736,1732,1761] Insecta Chloropidae Aphanotrigonum Animalia Diptera 7 621 Arthropoda genus  The five species of  Aphanotrigonumidentified in our dataset include one species complex and  A.palpalisRiccardi ( Riccardi, 2024). According to Nartshuk and Andersson's (2013)definition, three species in our dataset were identified as  A.trilineatum, leading us to assume that the current definition of  A.trilineatumcorresponds to a species complex that has been previously unrecognised. The species  Aphanotrigonum beschovskiiDely-Draskovitsis currently considered a junior synonym of  A. trilineatum(Meigen)( Bystrowski et al., 2023; Nartshuk & Andersson, 2013). Dely-Draskovits (1981)distinguished  A. beschovskiiby the base of surstylus bearing short setae, unlike  A. trilineatumsensu Nartshuk and Andersson (2013). The longitudinal lines in the scutum are distinctive features of  A. trilineatumaccording to Nartshuk and Andersson (2013). However, our data show that this feature is shared by four species (Figure 5M1, N1, O1, P1). The morphology of the male terminalia and clusters at a 3% threshold support four species, three of which identified as  A. trilineatum. The diagnostic features of the species assigned to the cluster 147 are outlined in Table 2. Our results support the erection of  Aphanotrigonum beschovskiias a valid species. The species identified here as  A. trilineatumvar. 2 corresponds to Nartshuk and Andersson's (2013)figures 142–148 of  A.trilineatum. Therefore,  A.trilineatumvar. 1 should be described as a new species after consultation of the  A.trilineatumtype series.