Megatrigon apiformis, Doczkal & Radenković & Lyneborg & Pape, 2016

Doczkal, Dieter, Radenković, Snežana, Lyneborg, Leif & Pape, Thomas, 2016, Taxonomic revision of the Afrotropical genus Megatrigon Johnson, 1898 (Diptera: Syrphidae), European Journal of Taxonomy 238, pp. 1-36 : 24-25

publication ID	https://doi.org/ 10.5852/ejt.2016.238
DOI	https://doi.org/10.5281/zenodo.3854654
persistent identifier	https://treatment.plazi.org/id/03EA327E-FFF6-EC0F-FDFF-EBFFFC8FFE46
treatment provided by	Valdenar
scientific name	Megatrigon apiformis
status	sp. nov.

Treatment

Megatrigon apiformis View in CoL sp. nov.

urn:lsid:zoobank.org:act:F83D697B-489E-4E4C-AE21-BB7A4FCA6C4F

Figs 1G View Fig , 2H View Fig , 3G View Fig , 4C View Fig , 5A View Fig , 7G View Fig , 10G View Fig , 11G View Fig , 12F View Fig , 16 View Fig

Diagnosis

Small, slender, golden-haired species ( Fig. 1G View Fig ); head ( Fig. 2H View Fig ) almost entirely covered by dense, whiteyellow microtrichia except following bare parts: triangular area laterally from median microtrichiose stripe on face, area lateral and above the antennae, posterior margin of the head (in dorsal view); wing ( Fig. 5A View Fig ) completely covered with very dense, white microtrichia; mesoscutum ( Fig. 4C View Fig ) besides lateral microtrichiose stripes, also with long submedian stripes far exceeded the level of transverse suture, indistinct median stripe along the whole length of mesoscutum (can be interrupted) and well-developed prescutellar microtrichia.

Etymology

The species epithet, which is formed as an adjective, is derived from the Latin words apis (= [honey] bee) and forma (= shape), alluding to the honey bee-like appearance of this species.

Type material

Holotype

SOUTH AFRICA: ♁, KwaZulu-Natal, Pietermaritzburg , 12 Oct. 1971, leg. M.E. Irwin ( NMSA).

Paratype

SOUTH AFRICA: 1 ♁, KwaZulu-Natal, Goskies Farm, Karkloof, 21 Dec. 1983, B.R. Stuckenberg leg. ( NMSA).

Description

LENGTH. Body 7.5 mm, wing 5.8 mm.

HEAD ( Figs 2H View Fig , 3G View Fig ). Distance between eyes, 0.16–0.17 × width of head; post-ocular orbit wider, the width of post-ocular orbit dorsally 0.13–0.14 as wide as head; ocellar triangle isosceles, without median longitudinal groove; postpedicel ( Fig. 3G View Fig ) almost rounded, 1.2–1.3 × as long as deep, 1.6–1.7 × as long as pedicel; supra-alar setae yellow.

THORAX ( Fig. 4C View Fig ). Microtrichia on mediotergite covered about one third of width.

WING ( Fig. 5A View Fig ). Setae on costagium yellow; wing veins mostly yellow, but darker distally.

LEGS. Setae on legs yellow; only apex of pro- and mesofemur lighter, not also the base; of tarsi, only tarsomere 1 of metaleg darkened dorsally; microtrichia on metatibia dorsally relatively short like in M. argenteus comb. nov.

ABDOMEN ( Fig. 7G View Fig ). Relatively narrow, tergite 2 is 1.8 × and tergite 3 is 2 × as wide as long; tergites with a golden lustre, long, dense, golden setose; tergites 2–4 with transversal, yellow-white microtrichiose fasciae connected in the middle; fasciae on tergites 2+3 oblique and reaching lateral margins, tergite 4 with horizontal fasciae, widely separated from lateral margin; tergite 4 with wide microtrichiose posterior margin and one or two pairs of depressions; indistinct white microtrichia present anteromedially on

tergites 2–4, more developed on tergite 2, but on tergites 3+4 connected with fasciae along the median line. Male genitalia in Figs 10G View Fig , 11G View Fig , 12F View Fig .

Distribution

Afrotropical – South Africa (KwaZulu-Natal) ( Fig. 16 View Fig ).