Heteromeringia mediana, 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 : 59-60

Heteromeringia mediana sp. n.

( Figs 3 , 42-44 , 63 , Map 5 )

Description ( Figs 3 , 63 )

Male

Body length 3.5 mm. Bristles black. Two dorsocentral bristles plus one minute bristle in front of anterior dorsocentral. Four fronto-orbital bristles with anterior reclinate fronto-orbital 2/3 length of remaining fronto-orbitals. Arista short-plumose. Ocellar bristle relatively long and welldeveloped. Anterior genal bristle vibrissa-like. Thorax yellow with katatergite, lateral margin of scutum and dorsal margin of pleuron in front of alar base with orange tinge, and scutellum with wide median brown stripe. Head yellow with median orange infuscation under tomentose patch on gena and ocellar tubercle brown. Legs yellow with elongate light brown subbasal spot on fore femur. Abdomen brown with tergite 1 and anterior half of tergite 2 yellow. Wing darkly clouded on distal half along costa, around R 2+32+3 and R 4 4+5, and around basal section of CuA 1; lightly clouded in costal cell and around remaining veins. M 1+2 ratio 12.0.

Male terminalia ( Figs 42-44 )

Annulus well-developed and bare. Epandrium 1/5 wider than long, and length half height with anterior margin curved. Cerci long, united and tapering apically with deep central emargination. Surstylus small and rounded with long, stout, pointed bristles along distal margin. Internal genitalia as described for H. czernyi , except hypandrium + pregonite without thin median process and minute setulae present distally.

Female

Unknown.

Etymology

The specific name refers to the median stripe of the scutellum.

Holotype: BRAZIL. Amazonas , 26km NE Manaus, Reserva Ducke, 22.xii.1988, J.A. Rafael, Arm. suspensa 1.5m (1 , INPA).

Comments

Heteromeringia mediana differs from other New World Heteromeringia in having a median brown stripe on the scutellum and a very large M 1+2 ratio. Its genitalia are similar to those of H. quadriseta , but the epandrium is shallower, the surstylus is slightly angulate, the hypandrium is more elongate and the phallapodeme is curved.

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 42-44: Heteromeringia mediana sp. n., genitalia. 42 internal, left lateral; 43 external, left lateral; 44 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.