Taxonomic revision of the Afrotropical genus Megatrigon Johnson, 1898 (Diptera: Syrphidae) Author Doczkal, Dieter 79800F7A-AA21-4948-AD64-619BD5FCBB98 Bavarian State Collection of Zoology, Zoologische Staatssammlung, Munich, Germany. & Email: doczkal @ zsm. mwn. de & urn: lsid: zoobank. org: author: 79800 F 7 A-AA 21 - 4948 - AD 64 - 619 BD 5 FCBB 98 doczkal@zsm.mwn.de Author Radenković, Snežana 26DF35D9-55FA-4485-8E8C-C1F90EFE1036 University of Novi Sad, Department of Biology and Ecology, Trg Dositeja Obradovica 2, 21000 Novi Sad, Serbia. & Email: snezana. radenkovic @ dbe. uns. ac. rs & urn: lsid: zoobank. org: author: 26 DF 35 D 9 - 55 FA- 4485 - 8 E 8 C-C 1 F 90 EFE 1036 snezana.radenkovic@dbe.uns.ac.rs Author Lyneborg, Leif DAEF2A0D-7A43-4CF8-8E31-376C0B188EC6 Deceased 10 September 2006, former address: Natural History Museum of Denmark, Universitetsparken 15, 2100 Copenhagen, Denmark. & urn: lsid: zoobank. org: author: DAEF 2 A 0 D- 7 A 43 - 4 CF 8 - 8 E 31 - 376 C 0 B 188 EC 6 Author Pape, Thomas 1371BF99-D20A-47B9-BA9D-1F8D830A1B5A Natural History Museum of Denmark, Universitetsparken 15, 2100 Copenhagen, Denmark. & Corresponding author: tpape @ snm. ku. dk & urn: lsid: zoobank. org: author: 1371 BF 99 - D 20 A- 47 B 9 - BA 9 D- 1 F 8 D 830 A 1 B 5 A & Corresponding author: tpape @ snm. ku. dk tpape@snm.ku.dk&tpape@snm.ku.dk text European Journal of Taxonomy 2016 2016-10-20 238 1 36 journal article 21866 10.5852/ejt.2016.238 8b57d1e6-b2b7-4229-912a-c042457efaaf 2118-9773 3849874 36FC5EA6-E82D-4E21-9060-030CF13ED1B7 Megatrigon magnicornis sp. nov. urn:lsid:zoobank.org:act: DA2E127C-C16A-4ED5-BAAE-5C16FC9DA535 Figs 1D , 2D , 3D , 4A , 6C , 7D , 10D , 11D , 12D , 13D , 15 Diagnosis Antennae long, postpedicel very long ( Fig. 3D ), 1.9–2.2 × as long as deep, 2.4–2.75 as long as pedicel; tergites 2+3 ( Fig. 7D ) with small silver spots (not reaching margins of tergite, except sometimes in tergite 3) largely separated (distance between silver spots on tergites 2+3 large, 0.45–0.50 × as wide as tergite); silver spots on tergite 3 with scattered black and white setae. Etymology The species epithet, which is formed as an adjective, is derived from the Latin words magnus (= large) and cornus (= horn), alluding to the long antennae. Type material Holotype SOUTH AFRICA : ♁, Eastern Cape , Goshen nr. Cathcart , Mar. 1954 , museum staff leg. ( SAMC ). Paratypes SOUTH AFRICA : 2 ♁♁, 1 ♀ , Eastern Cape , Goshen nr. Cathcart, Mar. 1954 , museum staff leg. ( SAMC ); 1 ♁, Eastern Cape , Boesmansriviermond, 27–31 Dec. 1985 , J. Londt leg. ( NMSA ); 1 ♀ , Eastern Cape , Grahamstown, 29 Oct. 1959 , D.J. Greathead leg. ( BMNH ); 1 ♀ , Eastern Cape , Grahamstown, Apr. 1963 , Miss M. Daly & Miss M. Sole leg. ( AMGS ). Description LENGTH. Body 10 mm , wing 6.5–7.0 mm. HEAD ( Figs 2D , 3D ). Upper part of face across the whole width, at the level and below antennae, completely covered with microtrichia, thereby microtrichiose stripes along eye margin and median facial stripe connected at that level; frons and vertex shiny (only few microtrichia in the middle of frons, anterior and lateral to anterior ocella), without postocellar spots or with very few microtrichia; microtrichia on post-ocular orbit do not exceed post-ocular ridge; length of post-ocular orbit large, 0.11– 0.13 × width of head; distance between eyes large, 0.21–0.23 width of head; ocellar triangle equilateral and without median groove. THORAX ( Fig. 4A ). Mesoscutum with two wide, distinct, long, lateral microtrichiose stripes, two long submedian microtrichiose stripes ending far beyond level of transverse suture, and weak prescutellar microtrichia; supra-alar setae yellow; median about 0.5 of width of mediotergite covered by microtrichia. WING. Membrane not infuscated, veins and microtrichia light brown, cell br above vena spuria almost all covered with microtrichia; costagium with yellow setae. LEGS ( Fig. 6C ). Setae on legs all yellow; pro- and mesotibia with indistinct dark submedian ring; all tarsi yellow. ABDOMEN ( Figs 1D , 7D ). Tergites 2+3 and posterior margin of tergite 4 brown-yellow with black alveoli, setae on tergites short, yellow and in some parts black: posterior 0.25 of tergite 2, submedian and posterior part of tergite 3; tergite 2 medially covered with white microtrichia, tergite 3 with tiny microtrichiose line extended from anterior margin to the centre of tergite, tergite 4 without microtrichiose spots. Male genitalia in Figs 10D , 11D , 12D . Distribution Afrotropical – South Africa ( Eastern Cape ) ( Fig. 15 ).