Large-scale integrative taxonomy of Swedish grass flies (Diptera, Chloropidae) reveals hitherto unknown complexity of a dark taxon Author Riccardi, Paula Raile Author Hartop, Emily text Zoologica Scripta 2024 2024-05-20 53 5 614 631 https://doi.org/10.1111/zsc.12663 journal article 308815 10.1111/zsc.12663 1f91cf0c-277a-4239-827e-dd7f452ae64c 15089748 4.2.2 | Genus Aphanotrigonum Duda, 1932 The five species of Aphanotrigonum identified in our dataset include one species complex and A.palpalis Riccardi ( 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.trilineatum corresponds to a species complex that has been previously unrecognised. The species Aphanotrigonum beschovskii Dely-Draskovits is currently considered a junior synonym of A. trilineatum (Meigen) ( Bystrowski et al., 2023 ; Nartshuk & Andersson, 2013 ). Dely-Draskovits (1981) distinguished A. beschovskii by the base of surstylus bearing short setae, unlike A. trilineatum sensu Nartshuk and Andersson (2013) . The longitudinal lines in the scutum are distinctive features of A. trilineatum according 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 beschovskii as a valid species. The species identified here as A. trilineatum var. 2 corresponds to Nartshuk and Andersson's (2013) figures 142–148 of A.trilineatum . Therefore, A.trilineatum var. 1 should be described as a new species after consultation of the A.trilineatum type series.