Coenosia transversalis ( Emden, 1940: 160 )

Couri, Márcia & Pont, Adrian, 2016, Species of Coenosia Meigen (Diptera, Muscidae) described by Fritz van Emden from the British Museum Ruwenzori Expedition of 1934 – 1935, Zootaxa 4144 (4), pp. 529-555 : 553-554

Coenosia transversalis ( Emden, 1940: 160)

( Figs 37–40 ; 122–124)

Holotype male seen ( Figs 37–40 ); mid right and both hind missing.

Diagnosis. General colour brownish-grey pollinose; scutum with a brown transverse area presuturally and postsuturally; palpus brown; coxae and femora brownish-grey pollinose, tibiae and tarsi brown; arista short-haired; dorsocentrals 1+2; scutellum with the basal and apical pairs of setae, both long; anterior and lower katepisternals a little shorter than the posterior one; both calypters small, the lower one about 1.5 times as long as upper one; haltere pale yellow; fore tibia with a median seta; hind tibia with one median anterior, one submedian anterodorsal, and one posterodorsal seta basad of the anterior one; last abdominal segment subglobular; sternite 5 as in Fig. 122 .

Male terminalia. Cercal plate and surstylus as in Fig. 123 . Aedeagal complex as in Fig. 124 .

Notes. The species keys out as an isolated species in the group key and is very easy to recognize by the scutal colour pattern and by the presence of only two postsutural dorsocentral setae. One identified male (not a paratype) was dissected and illustrated.

Figures

FIGURES 21 – 40. Dorsal habitus, lateral habitus, head in frontal view, and labels of types of Coenosia species: 21 – 24. Coenosia gracilipes (Emden), holotype male. 25 – 28. Coenosia niveifrons argentescens (Emden), holotype male (herein as C. argentescens stat. nov.). 29 – 32. Coenosia scutellaris (Emden), holotype male. 33 – 36. Coenosia somereni (Emden), holotype male. 37 – 40. Coenosia transversalis (Emden), holotype male.

FIGURES 113 – 124. Sternite 5; cercal plate and surstyli in dorsal view; epandrium, cercal plate, surstylus and aedeagus in lateral view: 113 – 115. Coenosia tertriguttata (Emden). 116 – 118. Coenosia tomentigera Emden, 1940. 119 – 121. Coenosia translucida (Emden). 122 – 124. Coenosia transversalis (Emden).