Opacifrons serrata, Papp, 2012

Papp, L., 2012, Five New Afrotropical Species Of Opacifrons (Diptera: Sphaeroceridae), Acta Zoologica Academiae Scientiarum Hungaricae 58 (2), pp. 121-143 : 132-134

publication ID	https://doi.org/ 10.5281/zenodo.5735739
persistent identifier	https://treatment.plazi.org/id/039187E2-FB08-FFF7-D3E9-F9B8FBDCFA45
treatment provided by	Felipe
scientific name	Opacifrons serrata
status	sp. nov.

Treatment

Opacifrons serrata View in CoL sp. n.

( Figs 32–38 View Figs 32–37 View Figs 38–40 )

Holotype male ( HNHM): Ethiopia, Akaki River , Addis Ababa, No. 115, 6. X. 1980, leg. [András] DEMETER.

Paratypes ( HNHM): all paratypes from Ethiopia, leg. DEMETER, 1980 : 2 males, 2 females: same as for holotype; 1 male: as for holotype, without No.; 2 males: ibid., 12. X., No. 191 ; 1 male 1 female: ibid., 29. Sept., No. 67 ; 1 female: ibid., 29. IX., No. 55 ; 1 female: ibid., 4. Nov., No. 375 ; 1 male 1 female: Ambo, 23. 11.; 1 female: ibid., 10 km NW of Indibir , 30. 11. [abdomen and genitalia of two males in a plastic microvial each with glycerol] .

Measurements in mm: body length 1.46 (holotype), 1.38–1.87 (paratypes), wing length 1.64

(holotype), 1.38 –2.00 (paratypes), wing width 0.75 (holotype), 0.70 –0.83 (paratypes).

A species rather close to O. subserrata sp. n., features not mentioned below may be found in the description of that species.

Body slightly darker microtomentose than that of O. subserrata sp. n.

Facial plate microtomentose, less shiny. 4 pairs of long interfrontal seta, middle pair 0.11 mm long. Genal seta 0.14 to 0.16 mm long. Arista c. 0.60 mm long (not measurable on holotype). Aristal cilia 0.025 mm long, cilia on first flagellomere 0.025 mm, i.e. slighly longer than in O. subserrata sp. n.

Acrostichal setae rather sparse but comparatively long. A pair of medium-long (0.11 mm) prescutellar acrostichal present. As in O. subserrata sp. n., some setae in the dorsocentral line may be longer than adjacent setae but they cannot be evaluated as characteristic setae.

Costal index 0.54 mm / 0.63 mm, i.e. 0.86, but up to 0.92 in paratypes. Inter-crossvein section of M 0.23 mm, M-M crossvein 0.10 mm, i.e. slightly less than in O. subserrata sp. n., but the difference is not sufficient to distinguish it from its sister species.

Male sternite 5 large caudally without any processes ( Figs 32–33 View Figs 32–37 ), medio-caudally less sclerotised, its setae short. Sternite 6 part of synsternite long and broad, sternite 7 short, not reaching even sagittal line, narrowing apically, sternite 8 part large, long and broad. Ventral processes of cerci ( Fig. 34 View Figs 32–37 ) broad with nearly straight apex. Male cercal pegs large and emerge far from each other ( Fig. 34 View Figs 32–37 ). Surstyli strongly asymmetrical ( Figs 35–36 View Figs 32–37 ) without an apical thorn and bear short or medium long setae on medial margin only. Left surstylus ( Fig. 35 View Figs 32–37 ) much narrower than right surstylus, with very small lateral lobe. Right surstylus ( Fig. 36 View Figs 32–37 ) broad with broad lateral lobe. Distiphallus ( Fig. 38 View Figs 38–40 ) rather large, ventral caudal projection (below distiphallus) very small. Epiphallus ( Fig. 38 View Figs 38–40 ) narrowly connected to basiphallus, rather similar to that of O. subserrata sp. n., with 3 small ventral projections subbasally. Postgonite ( Fig. 37 View Figs 32–37 ) broad in its basal 3/5 only, with sharp apex and conspicuously serrate posteriorly.