Somatiosoma awashensis, 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 : 371-372

Somatiosoma awashensis sp. n.

Fig. 24

Etymology: From the type locality, Awash National Park in Ethiopia.

Diagnosis: Pale yellow species with orb set far forward; gena about 1/4 diameter of eye and not significantly receding in profile; prg small, narrow, not visible externally; male has distinctive hypopygium, but features not easily appreciated from external examination.

Description:

Male.

Head: Yellow, oc triangle black; fr not visible in profile, at anterior oc 0.4× width of head, narrowed anteriorly, at level of antenae about 0.35× width of head; ocp in profile broadly visible behind eye margin and convex; face depressed and with distinct but shallow carina in upper half; gena slightly receding, 0.35× height of eye and with several minute pale setulae; mouthparts yellow, palp oval; antenna all yellow except third segment of arista which is dark in apical 3/4; third antennal segment round, about equal to height of gena at middle and about 0.28 diameter of eye, second segment with dorsal seta; 3 orb, all set far forward such that hind orb inserted half way from level of lunule to level of vertex, 1 vte and 1 vti, oc strongly divergent, pvt short, about 1/3 length of anteior orb and crossed, about 6 minute white setulae scattered on fr, postocular setulae very short and in 1 row, and postgenal seta short.

Thorax: Entirely pale yellow with most setae pale brown on dorsum and pale yellow on pleura. Chaetotaxy: 1 pprn with 1 setula adjacent to it, 1 strong dc and another about 1/3 its length just in front of it, acrs very short and undifferentiated from scutal setulae, setulae forming 8 irregular rows at level of transverse scutal suture between dc lines, prscut pair present but only a little stronger than other scutal setulae; 1 posthu, 1 short sa and 1 strong pa, scut with 2 pairs of marginals, subapical pair long, about twice length of basal pair, disc of scut with 8 scattered setulae, no fine crossed apical scut setulae; anepisternum with 1 seta at middle of posterior margin and katepisternum with 1 seta at upper margin, each with several pale setulae in front, more numerous on anepisternum.

Wing: Hyaline with pale yellow veins, costa with minute yellow spine-like setulae from R 1 to R 2+3, distance on costa between R 2+3 and R 4+5 about 0.7 that between R 4+5 and M 1+2, apical section of Cu about 2× length of posterior crossvein. Haltere yellow.

Legs: All yellow, only fore femur a little dilated, all setae and setulae pale yellow, longest on posterior aspect of fore femur, claws black, a little shorter than length of tarsomere 5, apicoventral seta on mid tibia yellow and distinctly shorter than diameter of tibia at apex.

Abdomen: Entirely yellow with a few short and fine pale yellow setulae on each tg, those on tg 5 about 1/3 length of tg.

Postabdomen: All yellow with small hypopygium and distinctive projecting lobes on st 6.

Female: Unknown.

Length: ơ body 1.7 mm, wing 1.5 mm.

Holotype: ơ ETHIOPIA: Awash National Park , ESE Metahara, 08°50'91''N: 40°00'32"E, 16.iii.1995, M. von Tschirnhaus (in alcohol, ZSMC).

Figures

Fig. 24. Somatiosoma awashensis sp. n., ơ hypopygium, lateral, with prg shown also in ventral view. Scale bar = 0.15 mm.