Notiochyromya lucida, Ebejer, 2009

Ebejer, Martin J., 2009, A revision of Afrotropical Chyromyidae (excluding Gymnochiromyia Hendel) (Diptera: Schizophora), with the recognition of two subfamilies and the description of new genera, African Invertebrates 50 (2), pp. 321-321 : 341-342

Notiochyromya lucida sp. n.

Fig. 5

Etymology: From Latin lucida (shiny), and refers to the shiny, weakly pruinose scutum of this species.

Diagnosis:A small orange-yellow species with a relatively large third antennal segment; scutum very sparsely pruinose, scutal setulae between dc rows at level of tranverse suture in 10 rows, scut with 4 pairs of marginals and abdomen without any markings.

Description:

Male.

Head: All yellow, including oc triangle; fr narrowed anteriorly, at level of antennae 0.6 width that at level of anterior oc and 0.6 width of one eye viewed from in front; covered with numerous minute pale setulae. Gena narrow, about 0.3 height of eye, yellow and with pale setulae. ocp yellow, in profile narrowly visible behind entire eye margin; with short postocular setulae irregularly in one row; isolated lower post-genal seta absent. Mouthparts small, yellow, palp short and round, vibrissal setulae of buccal margin longer, longest a little longer than anterior orbital. Face poorly sclerotized and depressed; median carina absent. Antenna yellow; second segment paler than third, with distinct short dark seta dorsally; third segment large and round, about 0.35 length of horizontal diameter of eye, finely pubescent; hairs shorter than diameter of arista at base; arista black almost throughout, yellow only at base and bare. Chaetotaxy: 3 strong orb, anterior strongly inclinate and longer than fr is wide at this level, middle orb closer to anterior than to posterior; oc short, divergent and shorter than pvt; 1 vti and 1 vte both strong.

Thorax: Yellow with somewhat darker dc and ia lines; ntpl contrasting very pale yellow; scut, mtn and pleura all yellow; scut flat on disc, lateral marginals about half length of subapicals, with shorter setae between marginals, but not on disc. Chaetotaxy: 1 pprn, 1 pra, 1 sa, 1 pa, 2 ntpl, 1 strong postsutural dc and another in front of this about one third its size; acrs undifferentiated; setulae on scutum at level of transverse suture in 8 irregular rows between dc lines; pleural setae not seen because of pin.

Wing: Hyaline, veins all pale yellow; R 4+5 and M 1+2 run parallel to wing margin converging only in apical 1/4; distance between R 2+3 and R 4+5 about 0.7 that between R 4+5 and M 1+2; discal cell broadest at level of anterior crossvein; distance between crossveins 0.7 length of apical section of vein Cu. Haltere pale yellow.

Legs: Not modified, except for slightly thicker femora; generally fine pale setulae scattered on all pairs of legs, in addition about 6 long setae present on posterodorsal aspect of fore femur; mid tibial apicoventral seta almost as long as diameter of tibia at apex, yellow; claws and pulvilli normal; hind trochanter normal.

Abdomen: All yellow and without pattern of spots or bands; setae short; st 6 with a long seta laterally; tg 6 narrow and mostly covered by ep.

Postabdomen: ep large and yellow with a short surs projecting antero-ventrally; ej apd very large, umbrella-shaped and reaching far forward, ph apd long and broad; prg trapezoidal, psg not identified, surs narrow, curved at extreme apex.

Female. Unknown.

Length: ơ body 1.6 mm, wing 1.6 mm.

Holotype: ơ TANZANIA: E Usambara Mts , Amani Research Station [05°06'S: 38°38'E], alt. 900 m, 19– 27.vi.1974, D. Hollis ( BMNH).

Figures

Fig. 5. Notiochyromya lucida sp. n., ơ: (a) head, lateral; (b) st 5, ventral; (c) ej apd, dorsal; (d) hypopygium, lateral. Scale bars = 0.2 mm in Figs 5a, b, d and 0.1 mm in Fig. 5c.