Notiochyromya, 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 : 337-338

Key to the Afrotropical species of Notiochyromya

[NB: The following key includes a number of undescribed species only known from females.]

Males

1 Scutellum with 4 marginal setae only; abdomen ( Fig. 9b ) with dark brown midline spots on tergites and ep, also with brown lateral areas on each tg, postabdomen Fig.

12 ............................................................................................... tripunctata sp. n.

– Scutellum with 6–8 marginal setae (if with short setae on disc, see key to females); abdominal markings various ................................................................................. 2

2 Scutellum with 8 marginal setae; scutum shiny with barely a trace of pruinosity; abdomen lacking dark spots, postabdomen Figs 5 , 6 ......................... lucida sp. n.

– Scutellum with 6 marginal setae; scutum uniformly pruinose yellow to pale brown .............................................................................................................................. 3

3 Sternite 2 with a large shiny spot medially, leaving only a narrow margin of st with dense brown pruinosity, postabdomen Fig. 7 .............................. monticola sp. n.

– Sternite 2 with a small medial shiny spot occupying middle 1/3 of diameter of st, leaving wide margin of brown pruinosity on st, postabdomen Fig. 4 .................... .......................................................................................................... filigera sp. n.

Females

1 Scutellum with 4 marginal setae and no setulae on disc ........... tripunctata sp. n.

– Scutellum with 6–8 marginal setae; with or without setulae on disc ................... 2

2 Scutellum with 6 marginal setae (the pair between basals and subapicals are set medially; with or without a few short setae on disc); mtn pale ............................ 3

– Scutellum with 8 marginal setae; with or without a few additional short setae on disc; if with 6 setae on scut, then with short setae on disc and mtn dark ............. 6

3 Scutellum without short setae on disc .................................................................. 4

– Scutellum with short setae on disc; tergites with dark spots on lateral borders only, and these only on tg 3–6 ................................................................. sp. A, Namibia

4 Abdomen ( Fig. 9a ) with a small brown or black rounded spot on tg 3 to 6 laterally, and often with a darkening along midline that may or may not form a discrete spot; each spot is slightly shining and surrounded by a clear yellow margin; head short, in profile strongly sloping and frons narrower than 1/3 width of head at vertex, postabdomen Fig. 11 ................................................................ sexspinosa (Lamb)

– Abdomen with large, oval, lateral, black spots completely shining and almost reaching anterior and posterior margin of each tg ............................................................... 5

5 Abdomen with shiny brown transverse bands on tergites ................ filigera sp. n.

– Abdomen with large black lateral spots on tergites, postabdomen Fig. 8 .............. ..................................................................................................... monticola sp. n.

6 Scutellum with 8 marginal setae, but no setae on disc; mtn yellow; abdomen with short longitudinal dark line at apex formed by midline spot on tg 6 and 7; bright pale yellow species with yellow vestiture ...................................... sp. B, Namibia

– Scutellum with 8 marginal setae (occasionally 6) and with short setae on disc; mtn dark; abdomen with spots on tg 5 and 6 out of line relative to those on tg 2–4, thus closer to midline of respective tg ................................................... sp. C, Namibia

Figures

Fig. 9. Lateral aspect of head:(a) Notiochyromya tripunctata sp. n., ơ; (b) Notiochyromya sexspinosa (Lamb), ^, Nigeria. Scale bar = 0.4 mm.

Fig. 12. Oroschyromya affinis sp. n., ơ: (a) apex of hyp, lateral; (b) prg, lateral; (c) psg, lateral; (d) surs, lateral; (e) same, posterior. Scale bars = 0.1 mm. (See Fig. 23 for comparison.)

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.

Fig. 6. Notiochyromya monticola sp. n., ơ: (a) hypopygium, lateral, scale bar = 0.2 mm; (b) st 5, ventral, scale bar = 0.15 mm.

Fig. 7. Notiochyromya monticola sp. n., ^postabdomen, lateral (a) and ventral (b). Scale bar = 0.15 mm.

Fig. 4. Notiochyromya filigera sp. n., ơ: (a) head, lateral, scale bar = 0.3 mm; (b) hypopygium, lateral, scale bar = 0.18 mm; (c) st 5, ventral, scale bar = 0.1 mm.

Fig. 11. Notiochyromya tripunctata sp. n., ơ hypopygium, lateral. Scale bar = 0.2 mm.

Fig. 8. Dorsal aspect of abdomen: (a) Notiochyromya sexspinosa (Lamb), ^, Nigeria; (b) Notiochyromya tripunctata sp. n., ơ. Scale bar = 0.6 mm.