Coenosia nigromaculata, Couri, Márcia & Pont, Adrian C., 2014

Couri, Márcia & Pont, Adrian C., 2014, New species of Afrotropical Muscidae (Diptera: Muscoidea), Zootaxa 3852 (3), pp. 301-320 : 305-306

Coenosia nigromaculata sp. nov.

Figs 2 , 8–9 .

Type material. Holotype ♀, BURUNDI: Kayanza Prov., Parc National de la Kibira, Rwegura Sector, 02˚55.320′S, 29˚30.067′E, 2237 m, Malaise traps, indigenous Afromontane forest, 21–26.xi.2010 (A.H. Kirk-Spriggs), BMSA (D)25761 ( BMSA).

Paratypes, 2♀. BURUNDI: same data as holotype, except: BMSA (D)25774 ( MNRJ) and BMSA (D)28094 ( BMNH).

Diagnosis. Frontal vitta velvety black, dilated in lower third; head with patch of black dust medially on frontoorbital plate; palpus black; presutural fascia complete ( Fig. 4 ), slightly concave posteriorly, but not incised; black patch covering lower edge of postpronotal lobe, the upper anterior corner of anepisternum and the anterior spiracle; femora black and shining (not dusted as in C. duomaculata sp. nov. and C. poecilotarsis ); abdominal pattern very well marked and well defined. This new species is also morphologically close to C. poecilotarsis and C. duomaculata sp. nov., but can be easily separated by the colour and shape of the presutural band, femoral colour and the velvety black frontal vitta, which is markedly dilated in the lower third.

Description. General colouration. Ground colour dark brown, pale dusted; head with frontal vitta velvety black, dilated in ventral ⅓; fronto-orbital plate, face and gena grey pruinose, the former with dark brown patch around frontal setae; antenna, arista and palpus dark brown; notum pale dusted, with dark brown fasciae on prescutum and scutum ( Fig. 2 ); scutellum entirely dark brown; pleura pale dusted; calypters white; haltere pale yellow, knob whitish; anterior spiracle dark brown; wing hyaline; legs with coxae brown, pale dusted; femora, tibiae and tarsi dark brown, slightly shining; base of mid and hind femora brown; abdomen pale dusted, with large, round, dark brown, well-marked and well-defined lateral maculae on all tergites; tergites 3–5 with broad median vitta.

♀. Measurements. Body length: 4.2 mm; wing length: 4.2 mm.

Head. Eye bare; frons at vertex ⅓ head-width; 2 pairs of inclinate frontal setae, and 1 pair of reclinate orbitals; medial vertical seta extremely long; ocellar setae short and weak; antenna inserted above mid-level of eye, with postpedicel about 3 × length of pedicel; arista with very fine and short pubescence, shorter than basal width of arista; palpus with long ventral setae.

Thorax. Dorsocentrals 1 + 3; acrostichal setulae in 2 sparse, irregular rows, prescutellar pair not differentiated; 1 postpronotal; 1 presutural and 1 postsutural intra-alar, anterior postsutural seta not developed; 1 postsutural supra-alar; 2 postalars; prealar absent; notopleuron with 2 setae similar in size; anepisternum with series of 3 long and 2 short setae; katepisternals 1 + 1 + 1, arranged in equilateral triangle. Scutellum with 1 long basal and 1 long apical pair of setae, similar in length, and a few setulae close to apex.

Legs. Fore femur with rows of posteroventral, posterior and posterodorsal setae; fore tibia with posterior median seta, dorsal preapical, and apical setae on posterior, posteroventral and posterodorsal surfaces; mid femur with 4–6 anterior setae, one of which is preapical in position; posteroventral surface with 2 fine setae in median ⅓, 2 posterior preapicals; mid tibia with 1 anterodorsal and 1 posterodorsal median setae, 1 dorsal preapical and anterodorsal, anterior, anteroventral, ventral and posteroventral apical setae, the ventral one longer; hind femur with a row of about 5 well-spaced anterodorsal setae, 3 well-spaced anteroventrals and 2–3 fine and long posteroventrals in basal ½; hind tibia with 1 anterior, 1 median anterodorsal and 1 posterodorsal inserted slightly above anterodorsal, 1 posterodorsal and 1 anterodorsal preapicals and 1 ventral apical.

Wing. Veins bare; veins M and R4+5 parallel at wing-tip; lower calypter much shorter than upper.

Abdomen. Syntergite 1 + 2 and tergite 3 with 1 lateral pair of setae; tergites 4 and 5 with several discal setae; sternite 1 bare.

Terminalia . Ovipositor long, with microtrichia on both sides ( Figs 8–9 ); spermathecae oval, as in Fig. 9 .

♂ Unknown.

Distribution. Burundi (Parc National de la Kibira).

Etymology. The specific epithet nigromaculata is derived from the Latin niger (“black”) and maculatus (“maculate”), referring to the black fascia on the prescutum. It is an adjective in agreement with the feminine noun Coenosia .

Figures

FIGURES 1 – 4. 1. Coenosia duomaculata sp. nov., notum, dorsal view; 2. Coenosia nigromaculata sp. nov., notum, dorsal view; 3. Helina harrisorum sp. nov., notum, dorsal view; 4. Helina ferfriniorum sp. nov., notum, dorsal view.

FIGURES 5 – 12. Coenosia duomaculata sp. nov.: 5. ovipositor, dorsal view; 6. ovipositor, ventral view and spermathecae; 7. Egg. Coenosia nigromaculata sp. nov.: 8. ovipositor, dorsal view; 9. ovipositor, ventral view and spermathecae. Coenosia fragilis sp. nov.: 10. sternite 5, dorsal view; 11. cercal plate and surstyli, dorsal view; 12. cercal plate, surstylus and aedeagus, lateral view.