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 Dicerura unidentata Spungis, 1987 Figs 28–31 Spungis (1987) based his description of D. unidentata on three larvae found in Latvia , of which one developed into a male adult. Subsequent records of males of this species are from Finland ( Jaschhof et al. 2014 ) and, as shown here, from Estonia , Slovakia , and Ukraine . The female of D. unidentata remains unknown. Diagnosis. Dicerura unidentata is a typical member of the dentata group. Characteristic of the gonocoxites, the ventral emargination is angular-shaped and bordered by small, inconspicuous protuberances with both setulae and large microtrichia ( Fig. 28 , ↓1); around the emargination is a darkly pigmented area. The subrectangular tegmen is 2.5 times longer than broad and provided with 4–6 small barbs of various sizes apicolaterally ( Fig. 31 , ↓2). The additional, single barb present at the tegminal apex (therefore the species’s name, unidentata ) is in most of the specimens studied here reduced to a roundish, sclerotized knob ( Fig. 31 , ↓3), in other specimens it is untraceable. The subtriangular gonostylus is about 1.5 times longer than broad; the mediobasal lobe is somewhat angular and provided with 5–15 short bristles among sparse, large microtrichia ( Fig. 30 ). The apical fork of the ejaculatory apodeme takes up more than one third of the apodeme’s total length ( Fig. 31 ). The apex of the ninth tergite, which is broadly rounded to truncate, is covered with dense, thick microtrichia ( Fig. 29 , ↓4). Species with similar genitalia are D. dentata and D. dispersa . In distinction from D. unidentata , the tegmen of D. dentata is provided with more and slightly larger barbs that together form a saw-blade structure on either side ( Jaschhof & Jaschhof 2013: fig. 50E ), while the tegmen of D. dispersa is constricted subapically, not parallel-sided ( Jaschhof & Jaschhof 2013: fig. 51C ). Remark. Unlike stated by Spungis (1987) , and in accordance with most Dicerura , the palpus of D. unidentata has four segments. Material examined. Finland : 9 males , Lapponia enontekiensis, Kilpisjärvi, SW slope of Saana, 15–30 June 2006 , MT, J. Penttinen (in MZH ). Estonia : male, Ida-Virumaa , Mäetaguse, 1–13 June 2011 , MT, H. Aia & EMTP (in IZBE ). Slovakia : 2 males , Muránská planina NP, Muránská Lehota, 12 April–24 May 2012 , MT, J. Roháček & J. Ševčik (specimens nos A7772–A 7773 in SDEI ). Ukraine : 3 males , Crimea , Crimean Mountains NR, Mount Babugan, 6 June 1986 , sweepnet, Z. L. Berest (in IBUL ).