Isoneuromyia glabra Evenhuis

Evenhuis, Neal L., 2006, New species of Isoneuromyia Brunetti (Diptera: Keroplatidae) from the Oriental Region, Zootaxa 1140, pp. 1-29 : 26-27

Isoneuromyia glabra Evenhuis , n. sp.

( Figs. 6 , 12 , 23 , 36)

Diagnosis

Closest to xanthina from Borneo but can be easily distinguished by the golden yellow tomentum on the posterior of the mesonotum (this area with black recumbent hairs in xanthina ) and the multidentate gonostylus (the apex of the gonostylus bidentate in xanthina ).

Description

MALE. Lengths: Body: 11.3 mm; wing; 7.8 mm.

Head. Yellowish orange except small black ocellar triangle; occiput with sparse yellow tomentum. Ocelli in horizontal line. Antennae yellowish orange. Face silvery pruinose. Palpi and proboscis yellowish.

Thorax. Mesonotum and scutellum brownish yellow with two admedial brown stripes ( Fig. 13 ), medial stripe absent. Mesonotum with scattered yellow tomentum, patch of thick black setae above wing root, on postalar calli, on and posterior margin of scutellum. Prescutellar area tapering to scutellum. Pronotal lobes yellow with black setae laterally. Pleura and mediotergite yellow, bare. Halter yellow.

Legs. [Mid legs missing]. Coxae yellow, yellow tomentose, with black hairs apically. Femora yellow, bare. Fore tibia with orange tibial pecten apically. 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 ( Fig. 23 ). Grayish yellow hyaline anteriorly along costal margin, becoming clear posteriorly; vein R4 slightly sinuous, ending in C slightly beyond end of R1; veins M2 and CuA1 not reaching wing margin.

Abdomen. Orange with dense yellow recumbent hairs; tergites VII–VIII with scattered black tomentum dorsally.

Hypopygium (Fig. 36). Not dissected. Gonocoxites and gonostyli orange­yellow, densely fine yellow pilose, apex multidentate.

FEMALE. Unknown.

Etymology

The species epithet derives from the Latin glabrus = bare, referring to the lack of brown hairs on the mesonotum and the bare femora.

Figures

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.

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 20 – 26. Isoneuromyia wings, showing apical patterning. 20. I. splendida, n. sp. 21. I. subapicalis, n. sp. 22. I. nigribasis, n. sp. 23. I. glabra, n. sp. 24. I. nigerrima, n. sp. 25. I. jata, n. sp. 26. I. yorki, n. sp.