Towards reliable identification of male Dicerura: descriptions of three new and seven poorly known species in the Palearctic region (Diptera: Cecidomyiidae, Porricondylinae) Author Jaschhof, Mathias Author Spungis, Voldemars text Zootaxa 2018 4422 1 85 103 journal article 29151 10.11646/zootaxa.4422.1.5 ea160d3a-63f4-4a24-b4b1-042ef1508b5c 1175-5326 1455505 D167DDAD-17D0-4F35-9873-85B4BC7E8FEB Key to male Dicerura in the Palearctic region 1 Anepisternum setose.................................................................................. 2 - Anepisternum asetose................................................................................ 14 2 Apical fork of ejaculatory apodeme with parallel, closely adpressed tines ( Fig. 8 ). Gonostylus without mediobasal lobe ( Fig. 6 )................................................................................................... 3 - Apical fork of ejaculatory apodeme with tines diverging, at least at the very end ( Fig. 1 ). Gonostylus with medial or mediobasal, mostly bulging lobe marked by dense microtrichia ( Figs 1 , 20 )...................................... 5 3 Gonostylus conspicuously broad and curved apically. Ventral gonocoxal emargination with asetose, broadly rounded lobe basally................................................................................... D. complicata - Gonostylus narrow apically, evenly rounded to pointed ( Fig. 6 ). Ventral gonocoxal emargination bordered by 2 pairs of processes ( Fig. 6 )....................................................................................... 4 4 Gonostylus broadly rounded apically ( Fig. 6 ). Ninth tergite with small, pointed lobes posterolaterally ( Fig. 7 ).. D. yezoensis - Gonostylus narrowly rounded apically ( Fig. 16 ). Ninth tergite with V-shaped incision posteromedially ( Fig. 17 ). D. formosa 5 Apical fork of ejaculatory apodeme with tines conjoined medially by membrane leaving just the tips separate ( Fig. 19 )................................................................................................. D. furculata - Tines of apical fork of ejaculatory apodeme not conjoined by membrane ( Fig. 5 ).................................. 6 6 Gonocoxites conspicuously densely setose ventrally, ventral emargination bordered by a single pair of processes......... 7 - Gonocoxites with ventral setae sparse or normally dense, ventral emargination bordered by 2 pairs of processes ( Fig. 1 )... 8 7 Apical fork of ejaculatory apodeme provided with tiny spines and merged with tegmen.................... D. peterssoni - Apical fork of ejaculatory apodeme smooth and separate from tegmen.................................. D. fungicola 8 Ventroposterior margin of gonocoxites broadly, darkly pigmented.............................................. 9 - Ventroposterior margin of gonocoxites not darkly pigmented................................................. 10 9 Apical fork of ejaculatory apodeme serrate on medial edges ( Fig. 27 ). Tegmen pointed apically ( Fig. 27 )........ D. stipator - Apical fork of ejaculatory apodeme not serrate ( Fig. 1 ). Tegmen broadly rounded apically ( Fig. 1 )............ D. jakovlevi 10 Tines of apical fork of ejaculatory apodeme with frayed ends ( Fig. 24 ). Medial lobe of gonostylus longer than half the gonostylar length ( Fig. 22 )............................................................................... D. iridis - Tines of apical fork of ejaculatory apodeme not frayed. Mediobasal lobe of gonostylus clearly shorter than half the gonostylar length............................................................................................. 11 11 Apical fork of ejaculatory apodeme about one third the apodeme’s total length, tines conspicuously slender............ 12 - Apical fork of ejaculatory apodeme about one fourth of apodeme’s total length, tines not particularly slender ( Fig. 3 ).... 13 12 Gonostylus as long as gonocoxite, apex bent inwards, conspicuously densely setose. Tegmen strongly constricted subapically, rounded posteriorly............................................................................ D. rossica - Gonostylus longer than gonocoxite, apex not bent, normally setose. Tegmen moderately constricted subapically, pointed posteriorly..................................................................................... D. xylophila 13 Ventral emargination of gonocoxites angular-shaped ( Fig. 3 ). Mediobasal lobe of gonostylus roundish ( Fig. 3 ).. D. penttineni - Ventral emargination of gonocoxites evenly rounded. Mediobasal lobe of gonocoxites angular-shaped...... D. triangularis 14 Empodia as long as tarsal claws........................................................................ 15 - Empodia vestigial................................................................................... 16 15 Gonocoxites with darkly pigmented area around ventral emargination ( Fig. 28 ). Tegmen with 4–6 sclerotized barbs of various sizes apicolaterally ( Fig. 31 )................................................................... D. unidentata - Gonocoxites without darkly pigmented area. Tegmen with 6 or more sclerotized barbs of about same size apicolaterally................................................................................................. D. dentata 16 Apex of tegmen strongly narrowed. Gonocoxal processes absent.............................................. 17 - Apex of tegmen broadly rounded, truncate or concave. Gonocoxal processes present or absent....................... 18 17 Gonocoxal emargination with convex basal edge ( Fig. 13 ). Tegminal apex acutely pointed ( Fig. 15 )........... D. foliicola - Gonocoxal emargination with concave basal edge. Tegminal apex narrowly rounded......................... D. mixta 18 Eye bridge 0–1 ommatidium long....................................................................... 19 - Eye bridge 3-4 ommatidia long......................................................................... 20 19 Ventral emargination of gonocoxites with small, setose protuberances basolaterally........................ D. dispersa - Ventral emargination of gonocoxites bordered by 2 pairs of processes.................................... D. feminea 20 Gonostylus with medio-subapical lobe ( Fig. 10 ). Ventral gonocoxal emargination extremely large, with microtrichose lobe basally ( Fig. 11 )............................................................................... D. barbata - Gonostylus with mediobasal lobe. Ventral gonocoxal emargination small, without lobe.................... D. separata