Isoneuromyia pallidopsis Evenhuis

Evenhuis, Neal L., 2006, New species of Isoneuromyia Brunetti (Diptera: Keroplatidae) from the Oriental Region, Zootaxa 1140, pp. 1-29 : 16-17

Isoneuromyia pallidopsis Evenhuis , n. sp.

( Figs. 16 , 30 , 39)

Diagnosis

This species fits in the group of species possessing yellow to orange tibial spurs. It appears closest to polybioides but can be separated from it by the all yellow flagellomeres (black apically in polybioides ) and the all hyaline to subhyaline wing (with apical infuscation in polybioides ).

Description

MALE. Lengths: Body: 6.0–9.0 mm; wing; 7.0– 7.5 mm.

Head. Vertex and occiput immediately behind ocelli black; remainder of occiput orange with scattered yellow tomentum, black hairs in a row along posterior eye margin. Ocelli in horizontal line. Frons yellow, bare. Antennae yellowish. Face brown, silvery pruinose with small black hairs apicolaterally. Palpi and proboscis orange­yellow.

Thorax. Mesonotum and scutellum yellow with three black mesonotal stripes coalesced into one ( Fig. 16 ), medial stripe extending anteriorly to pronotum. Mesonotum with uniformly distributed small recumbent yellow hairs dorsally, patch of thick black setae above wing root and on posterior margin of scutellum. Prescutellar area flared laterally at postalar calli. Pronotal lobes yellow, a few black setae laterally. Laterotergite and mediotergite yellow, remainder of pleura brown, pleura bare. Halter yellow with orange knob.

Legs. Fore coxa yellow, mid and hind coxae orange, all dense yellow tomentose apically; Femora yellow with yellow tomentum. Fore tibia with orange tibial pecten apically. Tibial spurs yellowish orange. Fore basitarsus 1.2 x length of fore tibia. Mid and hind basitarsi subequal in length to lengths of respective tibiae. Claws minute.

Wing. Grayish yellow hyaline anteriorly along costal margin, clear elsewhere; vein R4 slightly sinuous, ending in C slightly beyond end of R1; veins M2, CuA1, CuA2, and A1 not quite reaching wing margin.

Abdomen. Tergites ( Fig. 30 ) reddish brown with black mottling dorsolaterally; tergite I with recumbent black hairs posterodorsally. Sternum patterned as on tergites.

Hypopygium (Fig. 39). Gonocoxites and gonostyli dark brown, with black hairs, apex with two dark large black teeth fused together at their base.

FEMALE. Unknown.

Types

Holotype ♂ (BPBM 16,596) and paratype ♂ from: INDONESIA: Sulawesi: 100 km N. Palopo, Lamasie, 23 Ju–n 10 Jul 1966, R. Straatman. Holotype and paratype in BPBM.

Etymology

The species epithet derives from the Latin pallidus = pale + opsis = appearance, referring to the characteristic pale coloration.

Figures

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.