Heteromeringia quadriseta, Lonsdale & Marshall, 2007

Lonsdale, Owen & Marshall, Stephen A., 2007, Revision of the New World Heteromeringia (Diptera: Clusiidae: Clusiodinae), Beiträge Zur Entomologie = Contributions to Entomology 57 (1), pp. 37-80 : 60-61

Heteromeringia quadriseta sp. n.

( Figs 2 , 45-47 , 62 , Map 5 )

Description ( Figs 2 , 62 )

Male

Body length 2.9 mm. Bristles dark brown. Two dorsocentral bristles. Four fronto-orbital bristles with anterior reclinate bristle half length of remaining bristles. Ocellar bristle relatively long and well-developed. Anterior genal bristle vibrissa-like. Arista short-plumose. Thorax yellow with one pair of short thin postsutural stripes, lateral margin of scutum (excluding postpronotum) brownish and faded brownish stripe present below scutellum. Legs yellow with tarsomere 5 and distal edge of tarsomere 4 on fore tarsi brown. Head light yellow with ocellar spot brown and gena, face and mouthparts white; face, anterior 1/3 of frons and upper 3/5 of gena pilose. Abdomen predominantly yellow, although posterior margin of tergite 2 and tergites 3 and 4 brown, and tergite 5 with wide central stripe. Wing clouded around distal half of R 2+32+3. M 1+2 ratio 6.0.

Male terminalia ( Figs 45-47 )

Epandrium slightly wider than high and length 2/3 height. Surstylus small and rounded, distinctly wider than long and with stout pointed bristles on inner face. Cerci deeply sunken into epandrium, emarginate on distal 1/3 and with one pair of stout pointed apical bristles. Anterior face of hypandrium without process, dorsal margin strongly reclinate and terminal seta long and pointed (not rounded). Basiphallus fused to distiphallus and with wide diamond-shaped posteroventral plate. Phallapodeme as long as hypandrium + pregonite. Distiphallus relatively short with apex fringed.

Female

Unknown.

Etymology

The specific name refers to the four pairs of fronto-orbital bristles.

Holotype: PERU. Madre de Dios, Manu, Rio Manu, 250m, Pakitza , 12°07'S, 70°58'W, 9-23.ix.1988, A. Freidberg (1 , USNM).

Paratype: ECUADOR. Napo Province, Yasuni National Park , PUCE Yasuni Research Station , rainforest, Malaise trap, 00°38'S, 76°36' W, 30.x-20.xi.1998, T . Pape (1 , ZSMC) .

Comments

Heteromeringia quadrisetaquadriseta is a pale eastern South American species with a medially yellow scutellum. Heteromeringia lateralis (also in the H. czernyi group) and H. decora (incertae sedis )) also have a lighter scutellum, but these species are restricted to Central America, and they have a dark frons, a spot at the base of the arista and a predominantly brown scutellum.

Species incertae sedis.

Figures

Map 5: Distributions of species in the Heteromeringia czernyi species group excluding H. czernyi KERTESZ. Legend: H. flavipes ((WILLIST WILLISTON), circle; H. flavifrons HENNIG, dot.

Figs 2-7: Dorsal colouration, head and thorax. 2 H. quadriseta sp. n., male; 3 H. medianamediana sp. n., male; 4 H. decora sp. n., female; 5-6 H. flavifronsflavifrons HENNIG, female; 7 H. lateralis sp. n., female.

Figs 45-47: Heteromeringia quadriseta sp. n., genitalia. 45 internal, left lateral; 46 external, left lateral; 47 external, posterior. Ejaculatory apodeme omitted.

Figs 54-63: wings; 54: Heteromeringia fucata HENDEL, 1936, female; 55: H. nitida JOHNSON, 1913, female; 56: H. nervosanervosa sp. n., male; 57: H. fumipennis MELANDERMELANDER & ARGO, 1924, female; 58: H. decoradecora sp. n., female; 59: H. czernyi KERTESZ, 1903, female; 60: H. lateralislateralis sp. n., female; 61: H. flavifrons HENNIG, 1938, female; 62: H. quadriseta sp. n., male; 63: H. medianamediana sp. n., male.