Heteromeringia fucata HENDEL, 1936

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 : 44

Heteromeringia fucata HENDEL, 1936

( Figs 10-12 , 54 , Map 3 )

Heteromeringia fucatafucata HENDEL, 1936: 89 .

Description

Male

As described for female (see below) except as follows: minute bristle in front of anterior dorsocentral; small white disc anterior and ventral to anepisternal bristle; distal half of fore femur dark brown; hind tibia yellow; first flagellomere entirely yellow; infuscated regions on face, gena and parafacial dirty yellow to light brown (face otherwise yellow); palpus yellow with brownish base; frons pilose (excluding region around ocellar tubercle); wing clear.

Male terminalia ( Figs 10-12 )

Width and height of epandrium 1/3 greater than length. Cerci approximately 3/4 height of epandrium, widest subbasally, and with deep distal emargination. Surstylus nearly as high as epandrium, acutely triangular, curved inwards, slightly arched anteriorly, with minute setulae along outer surface apically and with small pointed bristles on inner-distal margin. Hypandrial complex similar to that of H. nigripes except pregonite with fewer distal setulae and no posterior setulae, and distal sclerites of distiphallus absent and basal sclerites somewhat widened and less heavily sclerotized at apex.

Female ( Fig. 54 )

Body length 4.3 mm. Bristles black. Two dorsocentral bristles. Ocellar bristle relatively long and well-developed. Genal bristles small and hair-like. Three fronto-orbital bristles. Arista pubescent. Thorax dark brown. Legs predominantly yellow with fore tarsi, fore tibia, hind tibia, distal 2/3 of fore femur and dorsal 2/3 of mid coxa dark brown. Head predominantly dark brown, although antenna (excluding arista) orange with anterior half of first flagellomere infuscated on inner face, anterior margin of frons orange medially, face yellow between antennal bases and tip of palpus yellow; upper-anterior margin of gena pilose (upper half of gena dirty yellow in female from Nova Teutonia); clypeus relatively wide laterally and thin medially. Abdomen dark brown with terminalia yellow. Wing darkly clouded excluding region anterior to vein R 1 in front of basal cells and along posterior margin. M 1+2 ratio 4.8.

Female terminalia

Not dissected.

Holotype: BRAZIL. Unt. Amaz. Taperiuha, b. Santarem , 1-10.vi.1927, Zerny (1 , NHMW).

Additional material examined: BRAZIL. Nova Teutonia, S.C., ix.1949, F. Plaumann (1  A , USNM) .

Comments

The male of this unusually dimorphic species is described here for the first time on the basis of a specimen collected with a female identical to the holotype. Although the male of Heteromeringia fucata does not closely resemble the female (see above description), both have yellow mid and hind femora in combination with a brown thorax, a relatively small M 1+2 ratio and a pilose patch on the upper-anterior margin of the gena, separating them from neotropical congeners.

Figures

Map 3: Distributions of Heteromeringia apholisapholis sp. n., H. zophinazophina sp. n., H. decora sp. n., H. nervosanervosa sp. n., H. volcanavolcana sp. n., H. nanellananella sp. n., H. nigrifrons KERTESZ, and H. fucata HENDEL.

Figs 10-12: Heteromeringia fucatafucata HENDEL, genitalia. 10 external, left lateral; 11 external, posterior; 12 internal, left lateral. 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.