Megatrigon ochreatus Doczkal & Radenković & Lyneborg & Pape 2016, comb. nov.
Creators: name: Doczkal, Dieter
name: Radenković, Snežana
name: Lyneborg, Leif
name: Pape, Thomas
Publisher: name: Zenodo
Year: 2016
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Syrphidae
Megatrigon
Megatrigon ochreatus

description: Megatrigon ochreatus (Hull, 1964) comb. nov.
Figs 1J, 2K, 3J, 7J, 10J, 11J, 12I, 16
Eumerus ochreatus Hull, 1964: 493. South Africa, Eastern Cape, Katberg.
Diagnosis
Frons and vertex shiny (Fig. 2K), almost without microtrichia (like in M. immaculatus sp. nov., M. magnicornis sp. nov. and M. tabanoides sp. nov.); tergites 2–4 with pairs of white microtrichiose fasciae, covered by yellow setae (Fig. 7J): tergite 2 with two small spots at posterolateral corners and indistinct microtrichia anteromedially, tergite 3 with two short, widely separated, postero-lateral stripes reaching lateral margins and tergite 4 with two large stripes tapering and almost connected in the middle, but not reaching lateral margins.
Type material
Holotype SOUTH AFRICA: ♂, Eastern Cape, Katberg, 1–10 Feb. 1933, R.E. Turner leg. (BMNH).
Paratypes SOUTH AFRICA: 1 ♂, KwaZulu-Natal, Royal Natal Nat. Park, 18 Mar. 1989, J.G.H. Londt leg. (NMSA); 1 ♂, Western Cape, Worcester Karoo Gardens, 17 Oct. 1970, H.V. Daly leg. (CAS).
Description
LENGTH. Body 10.0 mm, wing 7.5 mm.
HEAD (Figs 2K, 3J). Face largely microtrichiose: microtrichiose stripes along eye margins long, wide, especially at the level below antennae where joined median facial stripe and narrow oblique stripe; face and gena wider than in M. argenteus comb. nov., gena 1.5 × as wide as postpedicel (in M. argenteus comb. nov. gena and postpedicel of equal width); distance between eyes larger than in M. argenteus comb. nov., 0.19 × width of head; postocular orbit wider than in M. argenteus comb. nov., the width of postocular orbit dorsally 0.13 × width of head; postpedicel longer than in M. argenteus comb. nov., 1.7 × as long as deep; 1.7 × as long as pedicel; ocellar triangle equilateral without median longitudinal groove.
THORAX. Mesoscutum with lateral microtrichiose stripes and traces of prescutellar microtrichia; supraalar setae yellow; mediotergite mostly covered with microtrichia.
WING. Membrane irregulary yellow-brown infuscated, densely covered with microtrichia that is mainly yellow-brown, except white microtrichia along the posterior edge and wing base; costagium with yellow setae.
LEGS. Setae yellow; all tarsi yellow, metatibia almost entirely dark, with white microtrichia in proximal half dorsally that reach the scar.
ABDOMEN (Figs 1J, 7J). Narrower than in M. argenteus comb. nov. (tergite 3 is 1.8 × as wide as long); tergites yellow setose, except black short hairs in posterior part of tergite 2, anterior and posterior 0.33 of tergite 3, and anteriorly of tergite 4. Male genitalia in Figs 10J, 11J, 12I.
Distribution
Afrotropical – South Africa (Eastern and Western Cape, KwaZulu-Natal) (Fig. 16).
description: Published as part of Doczkal, Dieter, Radenković, Snežana, Lyneborg, Leif & Pape, Thomas, 2016, Taxonomic revision of the Afrotropical genus Megatrigon Johnson, 1898 (Diptera: Syrphidae), pp. 1-36 in European Journal of Taxonomy 238 on pages 27-28, DOI: 10.5852/ejt.2016.238, http://zenodo.org/record/3849874