Isoneuromyia brunettii Evenhuis

Evenhuis, Neal L., 2006, New species of Isoneuromyia Brunetti (Diptera: Keroplatidae) from the Oriental Region, Zootaxa 1140, pp. 1-29 : 15

Isoneuromyia brunettii Evenhuis , n. sp.

( Figs. 9 , 11 , 27 , 35)

Diagnosis

Closest to splendida but can be distinguished from it by the all yellow­orange flagellomeres (brown basally in splendida ) and the multidentate gonostylus (bidentate in splendida ).

Description

MALE. Lengths: Body: 12.0–16.0 mm; wing; 7.5–11.0 mm.

Head. Vertex and occiput immediately behind ocelli black; remainder of occiput brown to orange with fairly dense small recumbent hairs. Ocelli in horizontal line. Frons orange, bare. Antennae (cf. Fig. 6 ) orange. Face orange, dense silvery pruinose with a few yellow hairs laterally. Palpi and proboscis orange.

Thorax. Mesonotum orange with three black stripes coalesced into one ( Fig. 11 ), medial stripe extending anteriorly to pronotum. Scutellum black with thin orange posterior margin. Mesonotum with scattered yellow recumbent hairs dorsally, patch of thick black setae above wing root, on postalar calli, and a few small black hairs on posterior margin of scutellum. Prescutellar area tapering to scutellum. Pronotal lobes brown with scattered fine black hairs. Pleura and mediotergite dark brown, bare. Halter orange.

Legs. Coxae brown basally, yellow apically, with admixture of yellow tomentum and scattered black hairs. Fore and mid femora yellow, hind femur brown, all predominantly bare with recumbent black hairs only on dorsal surface. Fore tibia with small brownish tibial pecten. Tibial spurs black. Fore basitarsus 1.2 x length of fore tibia. Mid and hind basitarsi subequal in length to lengths of respective tibiae. Claws minute.

Wing. Subhyaline; vein R4 straight, ending in C slightly beyond end of R1; vein A1 complete, reaching wing margin.

Abdomen. Tergite I black with dense recumbent black hairs; tergites II–IV orange with scattered golden tomentum; tergites V–VII black with recumbent black hairs; tergite VIII orange with yellow hairs. Sternum patterned as on tergites.

Hypopygium (Fig. 35). Not dissected. Gonocoxites and gonostyli orange, yellow pilose, apex of gonostyli multidentate, largest teeth apically, row of smaller teeth basally.

FEMALE. Same as male except: pronotal lobes yellow with a spot of brown; fore coxae yellow, mid and hind coxae brown; cerci ( Fig. 9 ) long, as long as abdominal segment V with scattered fine brown hairs.

Types

Holotype ♂ (BPBM 16,589) from: LAOS: Vientiane Province: Ban Van Eue, 15 May 1966, native collector. Paratype: LAOS: Vientiane Province: 1Ψ, same data, 30 Mar 1966. Holotype and paratype in BPBM.

Figures

FIGURES 7 – 10. 7. Isoneuromyia splendida, n. sp., thorax, lateral view, vestiture removed. 8. Isoneuromyia variabilis, n. sp., apex of fore tibia showing tibial pecten in association with tibial spur. 9 – 10. Isoneuromyia female terminal abdominal segments, showing relative lengths of cerci. 9. I brunettii, n. sp. 10. I. yorki, n. sp.

FIGURES 11 – 19. Isoneuromyia thoraces, dorsal view. 11. I. brunettii, n. sp. 12. I. flava, n. sp. 13. I. glabra, n. sp. 14. I. matilei, n. sp. 15. I. nigribasis, n. sp. 16. I. pallidopsis, n. sp. 17. I. splendida, n. sp. 18. I. xanthina (Edwards). 19. I. yorki, n. sp.

FIGURES 27 – 33. 27 – 30. Isoneuromyia habituses, lateral view showing thoracic and abdominal shapes and patterning, legs beyond coxae removed and wing venation not shown. 27. I. brunettii, n. sp. 28. I. variabilis, n. sp. 29. I. nigerrima, n. sp. 30. I. pallidopsis, n. sp. 31 – 33. Isoneuromyia abdomens, dorsal view showing patterning. 31. I. splendida, n. sp. 32. I. subapicalis, n. sp. 33. I. nigribasis, n. sp.

FIGURES 1 – 6. 1 – 2. Isoneuromyia heads, lateral view, showing general shapes, antennal flagellomeres and vestiture removed. 1. I. splendida, n. sp. 2. I. yorki, n. sp. 3 – 6. Isoneuromyia antennae, lateral view. 3. I. nigerrima, n. sp. 4. I. splendida, n. sp. 5. I. polybioides (Edwards). 6. I. glabra, n. sp.