Revision of the Exechia parva group (Diptera: Mycetophilidae) Author Lindemann, Jon Peder https://orcid.org/0000-0001-6001-7910 UiT - The Arctic University of Norway, Tromso, Norway jon.p.lindemann@uit.no Author Soli, Geir https://orcid.org/0000-0001-5301-6995 Natural History Museum, Oslo, Norway geir.soli@nhm.uio.no Author Kjaerandsen, Jostein https://orcid.org/0000-0002-3104-073X UiT - The Arctic University of Norway, Tromso, Norway jostein.kjarandsen@uit.no text Biodiversity Data Journal 2021 2021-09-24 9 67134 67134 http://dx.doi.org/10.3897/BDJ.9.e67134 journal article http://dx.doi.org/10.3897/BDJ.9.e67134 1314-2828-9-e67134 A1151C0727B74F31BC4B6809DA6F87CD 54EEB1B3D94E5239B847CC1AD9587A36 Exechia chirotheca Lindemann sp. n. Materials Type status: Holotype . Occurrence : catalogNumber: TSZD-JKJ-111552 ; recordedBy: J. Emoto ; individualCount: 1 ; sex: male ; lifeStage: adult ; preparations: Pinned , with genitalia in glycerine in separate microvial; Location : country: Nepal ; stateProvince: Province No. 1; county: Terhathum District ; locality: Basantapur ; verbatimElevation: 2300 m ; decimalLatitude: 27.1333 ; decimalLongitude: 87.4333 ; Event : eventDate: 1972-05-06 ; Record Level: institutionCode: KUEC Description Male: Body length 3.3 mm. Wing length 2.8 mm. Colouration (Dry specimen). Head, face dark and clypeus dark brown; labellum pale brown; palpus yellow. Antenna with scape and pedicel yellow; flagellum brown, basal half of first flagellomere pale. Scutum, lateral sclerites and propleura brown; halteres yellow. Legs yellow. Abdomen dark brown. Terminalia yellow. Head . Frons and vertex covered with pale setae. Clypeus covered with pale setae, evenly distributed. Antenna long, 2.2 times as long as length from vertex to ventral margin of clypeus; flagellomeres longer than broad, with sixth flagellomere 1.5 as long as wide. Thorax . Scutum covered with pale setae. Legs . Fore leg with tibia 0.83 times as long as first tarsomere. Mid-tibia with 21 anterior, 3 posterodorsal, 10 posterior and 3 posteroventral bristles. Hind tibia with 9 anterodorsal, 4 posterodorsal and 6 posterior bristles. Wings . Vein r-m 2.9 times longer than stem of M-fork. Abdomen. Tergites covered with short, pale setae. Terminalia (Fig. 18 ). Each part of divided tergite IX apically with about 6 setae, the 2-3 most apical setae stout. Gonocoxites evenly covered with setae, except on basoventral half (Fig. 18 a , b ); GL apex with 3 stout short setae (Fig. 18 a , b ). Aedaegal guides elongate with parallel margins, apex acute (Fig. 18 a , b ). Hypandrium with about 6 setae, apical pair relatively short, reaching about the GL basal fourth (Fig. 18 a , b ). Hypandrial lobe with each branch basally wide, apically narrow, evenly tapered (Fig. 18 a ). Gonostylus (Fig. 18 c ) with DB large, elongate, apex rounded, apicoexternal margin forming a short rounded lobe extending distally; dorsal side evenly covered with setae. VB apically acuminate, apex acute, with 2 setae, most apical seta on apex. IB apically with 1 seta on apex and pair of setae on elevated area one-third from apex. MB short, slightly curved interiorly towards acute apex; apically forming a small finger-like process, with 2 setae on the apex. Diagnosis Distinguished from all species in the E. parva group in having the medial gonostylus branch with an apical finger-like process with 2 setae at the apex (Fig. 18 c ), the gonocoxal lobe apex with relatively short and stout setae (Fig. 18 a , b ) and by the shape of the dorsal gonostylus branch (Fig. 18 c ). Etymology From Latin chirotheca , mitten, relating to the shape of the dorsal and medial lobes of the gonostylus, resembling mittens. Distribution Oriental, Nepal (Fig. 19 ). Biology Adult collected in the eastern Himalayas (2300 m a.s.l.).