New species of Aprionus (Diptera, Cecidomyiidae, Micromyinae) from Sweden and other parts of the Palearctic region Author Jaschhof, Mathias 8B4B11B4-7C33-41AC-A042-AA9903CDC4B1 Station Linné, Ölands Skogsby 161, SE- 38693 Färjestaden, Sweden. & urn: lsid: zoobank. org: author: 8 B 4 B 11 B 4 - 7 C 33 - 41 AC-A 042 - AA 9903 CDC 4 B 1 & Corresponding author: mjaschhof @ yahoo. de mjaschhof@yahoo.de Author Jaschhof, Catrin BE4CA083-88F6-4037-826D-605FFF5078F7 Station Linné, Ölands Skogsby 161, SE- 38693 Färjestaden, Sweden. & Email: cjaschhof @ yahoo. de & urn: lsid: zoobank. org: author: BE 4 CA 083 - 88 F 6 - 4037 - 826 D- 605 FFF 5078 F 7 cjaschhof@yahoo.de text European Journal of Taxonomy 2017 2017-12-12 378 1 38 journal article 21947 10.5852/ejt.2017.378 d8db2633-9bda-4f4e-9ee6-a5f4bf19ad59 2118-9773 3838627 81628632-5B35-49E5-AB7A-B8B50B2FB06B Aprionus balduri sp. nov. urn:lsid:zoobank.org:act: 500C3CCF-E0E3-4201-98AB-605DE509F543 Fig. 1 Diagnosis A typical representative of the angulatus group ( Jaschhof & Jaschhof 2009: 223 ), distinguished by the following male genitalic characters in combination. The ninth tergite ( Fig. 1C ) is lobed posterolaterally (↓), with a membranous area between the lobes. The ventroposterior gonocoxal lobes are very large (↓, Fig. 1A ); the ventrobasal apodeme is strongly sclerotized (↓, Fig. 1A ). The ventrobasal and dorsoapical portions of the gonostylus are the same size; the gonostylar apex is narrow (↓, Fig. 1B ). The elongate tegmen has a large, rhombic central opening that lacks spinulae (↓, Fig. 1A ). Etymology Baldur, a friendly god, is a son of Odin and his wife, Frigg. Material examined Holotype SWEDEN : ♂ , Småland , Högsby , Hornsö kronopark, 57.02° N , 16.63° E , birch swamp, Malaise trap , Swedish Malaise Trap Project (trap 18, collecting event 343), 20–30 Jul. 2004 ( NHRS, no.CEC164 ). Paratype NORWAY : 1 ♂ , Vestfold , Horten, Adalstjernet SE , MT , E. Rindal leg., 8 Jul. – 12 Aug. 2003 ( DEI , no. CEC 165). Differential diagnosis Male genitalic structures of Aprionus balduri sp. nov. and A. angulatus (see Jaschhof & Jaschhof 2009 : figs 72A, 75A, 76A) are similar, but in the latter species the gonocoxal lobes are considerably smaller, the ninth tergite lacks a membranous area posteromedially, and the central tegminal opening is smaller and equipped with spinulae. Other characters Body size 1.1 mm . HEAD. Eye bridge 2–3 ommatidia long dorsally. A dense row of 10 postocular bristles. Neck of fourth flagellomere slightly shorter than node; translucent sensilla thick, simply hair-shaped. Palpus with 3 or 4 segments, even in one and the same specimen. Fig. 1. Aprionus balduri sp. nov. , holotype, ♂. A . Genitalia, ventral. B . Gonostylus, ventral. C . Ninth tergite, dorsal. Scale lines: 0.05 mm. Arrows indicate diagnostic characters. WING. ApicR 1 3 times as long as Rs. CuA straight, ends halfway to wing margin. LEGS. Claws sickle-shaped, 0–1 fine teeth. Empodia narrow, almost as long as claws. TERMINALIA. Ninth tergite short, anterior margin fully sclerotized ( Fig. 1C ). Medial extensions of gonocoxal apodemes sclerotized, interconnected medially. Gonostylus blunt-ended, 2+1 short bristles among dense setulae and microtrichia apically ( Fig. 1B ). Lateral pillars of tegmen thin, in touch subapically, recurved apically ( Fig. 1A ). Remark on the description The antennae of the holotype have retained only the first flagellomeres, in the paratype one flagellum is missing and the other is collapsed, which explains why the fourth flagellomere cannot be illustrated here (as is routinely done with Aprionus ). Distribution and phenology Norway ( Vestfold ), Sweden (Småland). This species is known from only two specimens, despite many years of collecting Micromyinae , including Aprionus , throughout Fennoscandia.