Isoneuromyia subapicalis Evenhuis

Evenhuis, Neal L., 2006, New species of Isoneuromyia Brunetti (Diptera: Keroplatidae) from the Oriental Region, Zootaxa 1140, pp. 1-29 : 13-14

Isoneuromyia subapicalis Evenhuis , n. sp.

( Figs. 21 , 32 , 40)

Diagnosis

Closest in appearance to formosana but can be easily distinguished by the subapical spot of infuscation on the wing (this infuscation extends to the wing apex in formosana ).

Description

MALE. Lengths: Body: 10.5–13.5 mm; wing; 7.6–8.5 mm.

Head. Vertex and occiput immediately behind ocelli black; remainder of occiput yellowish orange with fairly dense small black recumbent hairs. Ocelli in horizontal line. Frons yellowish brown, bare. Antennae yellowish orange; scape and pedicel silvery pruinose. Face yellow, silvery pruinose with a few black hairs apically. Palpi orange, last palpomere with brown dorsally. Proboscis yellowish orange.

Thorax. Mesonotum predominantly yellowish with three black stripes, medial stripe extending anteriorly to pronotum. Scutellum yellow with black hairs. Mesonotum with admixture of scattered small recumbent black hairs and yellow tomentum dorsally, patch of thick black setae above wing root and on posterior margin of scutellum. Prescutellar area tapering to scutellum. Pronotal lobes yellow with black setae laterally. Pleura and mediotergite yellow, bare. Halter yellowish white.

Legs. Coxae yellow to orange with black hairs. Femora yellow with recumbent black hairs, dense pilose areas appearing brown. Fore tibia with orange tibial pecten apically. Tibial spurs black. Basitarsi subequal in length to lengths of respective tibiae. Claws minute.

Wing ( Fig. 21 ). Yellowish hyaline anteriorly along costal margin, become more clear posteriorly; with brown infuscation subapically from costa to apex of cell m2, clear at apex of wing, cloud of brown surrounding venation at r­m fusion; vein R4 slightly sinuous, ending in C slightly beyond end of R1; veins M1, M2, CuA1, and A1 not quite reaching wing margin.

Abdomen. Tergites I–IV yellow, brown apically, dense black recumbent hairs on brown portion of segments making them appear black, bare on yellow portion; tergites V–VII predominantly brown with scattered black tomentum, dense dorsally; tergite VIII yellowish brown. Sternum patterned as on tergites.

Hypopygium (Fig. 40). Gonocoxites and gonostyli yellowish brown, densely fine yellow pilose, gonostylar apex with two long sclerotized black teeth, somewhat recurved downward, cleft between teeth deep.

FEMALE. As in male, but terminal segments of abdomen (V–VII) expanded; cerci yellowish brown, small, only slightly exserted.

Types

Holotype ♂ (BPBM 16,598) and paratype ♂ from: LAOS: Vientiane Province: Ban Van Eue, 30 Jun 1967, native collector. Other paratypes: LAOS: 1♂, same data, 30 Nov 1965; 1Ψ, same data, 30 Aug 1967; 2♂, 1? [abdomen missing], same data, 15 Sep 1967; 1♂, same data, 15 May 1967; 1♂, same data, 30 Sep 1967; 1♂, 1? [abdomen missing], same data, 31 May 1967; 2♂, same data, 15 Aug 1966; 1♂, same data, 31 Jan 1967; 1? [abdomen missing], same data, 31 Jul 1965; Sayaboury Province: Sayaboury, 1♂, 30 Sep 1966, native collector. Holotype in BPBM. Paratypes in BPBM and MNHN.

Etymology

The species epithet refers to the characteristic subapical infuscation on the wing.

Figures

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.

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.