Ceratrichomyia angolensis Reemer

Reemer, Menno & Stahls, Gunilla, 2013, Generic revision and species classification of the Microdontinae (Diptera, Syrphidae), ZooKeys 288, pp. 1-213 : 91

Ceratrichomyia angolensis Reemer sp. n. Figs 51-56

Type specimens.

HOLOTYPE. Male. Label 1: "ANGOLA 30 km NE / Duque de Bragan - / za, Nov. / Dec. 1957"; label 2: "Collector / G.H. Heinrich". Coll. CNC.

Diagnosis.

This species differs from both other known species of Ceratrichomyia by the bare postpronotum and katepimeron, the downward projecting face, and the absence of a ventrolateral ridge on the epandrium.

Description (based on holotype).

Adult male. Body size: 10 mm.

Head. Face occupying approximately 1/2 of head width in frontal view; yellowish brown, except for blackish marks dorsally along eye margin; entirely yellow pilose; with pit-like depressions on dorsal 1/3; face profile more or less straight, strongly produced ventrally below eye margin. Gena yellowish brown. Lateral oral margins not produced. Frons and vertex yellowish brown, a little blackish at and around ocellar triangle; yellow pilose. Occiput yellow; dorsally wide and yellow pilose, ventrally narrow and whitish pilose. Eye bare. Antennal fossa about as wide as high. Antenna orange brown, except basoflagellomere blackish brown; antennal ratio approximately as 6:1:18. Basoflagellomere very long, entirely covered with pile at least as long as 1.5 times diameter of basoflagellomere. Arista very small, shorter than pedicel; situated at about 1/3 from base of basoflagellomere.

Thorax. Mesonotum dorsally black, with margins widely yellowish brown, and with pair of narrow yellow submedian vittae, dividing black into three approximately equally wide parts; short, appressed yellow pilose; transverse suture yellowish brown. Postpronotum yellowish brown; bare. Postalar callus yellowish brown; yellowish pilose. Scutellum blackish brown; yellow pilose; without calcars. Pleurae orange brown. Anepisternum with deep sulcus separating anterior and posterior part; entirely yellow pilose. Anepimeron entirely yellow pilose. Katepisternum yellow pilose dorsally and ventrally. Katepimeron bare. Katatergum with short microtrichia, anatergum bare. Calypter yellowish brown. Halter yellow.

Wing: hyaline; microtrichose, except bare on cells bc and c, basal 1/2 of cell r1, almost entirely on cells br, bm, cup and on alula, and posterobasal 1/5 of cell r4+5. Vein bm-cu shorter than basal section of CuA1.

Legs: Orange brown except femora blackish brown on basal 1/2; yellow pilose. Coxae and trochanters blackish brown; pale pilose.

Abdomen. Constricted at 2nd segment, with narrowest point at posterior margin, widest halfway of tergite 4 (slightly wider than thorax). Tergites 1-3 fused. Tergite 1 dark brown; yellow pilose. Tergite 2 pale yellow; yellow pilose along lateral margin. Tergites 3 and 4 dark brown; yellow pilose. Sternite 1 yellow; bare. Sternite 2 yellow anteriorly, brown posteriorly; mixed yellow and black pilose. Sternite 3 dark brown; black pilose. Sternite 4 concealed behind genital capsule; brown; yellow pilose. Genitalia as in Fig. 56.

Female unknown.

Etymology.

The specific epithet (adjective) is derived from Angola, where the species was found.