Aphaniosoma aethiops, 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 : 386-387

Aphaniosoma aethiops sp. n.

Figs 31 , 32

Etymology: From Latin Aethiopia ( Ethiopia) , and refers to the country where it was first discovered.

Diagnosis: Predominantly yellow species; no long pair of fr setae/setulae in front of oc triangle, buccal margin has thin brown line, scutum with longitudinal brown stripes, abdominal tg yellow with broad brown transverse band, male postabdomen with large dark phallic complex and long, narrow, pale surs, tarsomere 5 of all legs dark brown. Female has diffuse brownish transverse band across middle of fr, abdomen with tg 6 and 7 completely brown, st 7 pigmented brown, tarsomeres 5 yellow.

Description:

Male.

Head: Yellow, oc triangle and ocp black, latter with a broad yellow stripe from vertex to neck and narrow yellow postocular margin; fr broad, about 1.3× width of eye at vertex, with margins only slightly convergent; eye oval, lying oblique, length of horizontal diameter about 1.3× length of vertical diameter; gena narrow, equal to 0.4 height of eye, yellow and with fine pale yellowish white setulae; face small membranous, with distinct linear facial carina; 2 short setae at anterior buccal margin; mouthparts small, yellow, palp elongate oval, buccal margin with thin brown line; antenna yellow, arista black in apical half of second segment, yellow basally and on first segment; 6–7 short orb; 10 minute pale yellow fr setulae of more or less equal length, ocellars long, divergent, 1 vti and 1 vte, short pvt, postocular setulae in one row; all setae yellow.

Thorax: Scutum yellow, yellow pollinose with 6 brown longitudinal stripes, all confluent anteriorly and middle pair remain confluent almost to posterior end, lateral stripes reach to base of pa seta; mtn brown, scut brown at base of lateral margin and beneath, pleura mostly yellow, but katepisternum with dark brown triangle in lower part, meron dark brown in lower half and anepimeron with dark brown line along suture with anepisternum, anepisternum with narrow paler brown border along lower margin and anterior margin. Chaetotaxy: 1+6 dc, only hindmost well-developed, remainder as short as other scutal setulae, 1+3 acrs, 1 pprn, 1 ihu, 1 posthu, 2 ntpl, 1 pa, 0+3 ia, 4 scut, 1 anepisternal and 1 katepisternal.

Wing: Hyaline with yellow veins; distance between crossveins about 0.6 length of apical section of Cu; distance between R 2+3 and R 4+5 on costa about 0.6 that between R and M 1+2, apical section of Cu about 2× length of posterior crossvein. Haltere pale yellow. Legs: Yellow and pale setulose, setulae becoming a little darker on tarsomeres; tarsomere 5 of all legs dark brown.

4+5

Abdomen: Yellow with a broad brown transverse band on each tg, setulae sparse and mostly along hind margin of tg, cerc pale yellow.

Postabdomen: Yellow apart from the large dark brown to black ph structures.

Female.

As male, but brown marking more extensive, abdomen with tg 6 & 7 completely brown; tarsomeres 5 yellow; fr with diffuse brownish transverse band across middle; st 7 pigmented brown. Postabdomen: very small; tg 8 and st 8 sclerotized, but minute and bare, each smaller than cerc.

Length: ơ body 1.2 mm, wing 1.1 mm; ^body 1.5 mm, wing 1.5 mm.

Holotype: ơ ETHIOPIA: Lake Abiata [Abiyata], 143 km S Addis Ababa [07°40'N: 38°41'E], 1.iv.1962, Lund University Expedition, Brink, Andersson, Cederholm ( MZLU).

Paratypes: 4ơ (3 headless) 6^same data as holotype ( MZLU) . KENYA: 2^Tsavo National Park , Voi R., 22.ii.1971, M. von Tschirnhaus (in alcohol, ZSMC) ; 1ơ Lake Elmenteita , 24.iii.1970, M. von Tschirnhaus (in alcohol, ZSMC) .

Figures

Fig. 31. Aphaniosoma aethiops sp. n., ơ: (a, b) hypopygium lateral (a) and posterior (b); (c) st 6, ventral. Scale bars = 0.15 mm.

Fig. 32. Aphaniosoma aethiops sp. n., ^postabdomen: (a) posterior, (b) lateral, (c) spermathecae. Scale bar = 0.15 mm.