Spilogona breviaristata, Couri & Pont, 2017

Couri, Márcia S. & Pont, Adrian C., 2017, African Spilogona Schnabl: morphology of the male terminalia and description of a new species (Diptera: Muscidae), Zootaxa 4277 (2), pp. 295-300 : 296

Spilogona breviaristata , sp. nov. ( Figs 5–8 )

Type material. Holotype male: AFRICA: NAMIBIA (25), Swakopmund , 26–30.i.1972; Southern African Exp., B.M. 1972-1 ( BMNH).

Paratypes. Same labels as holotype: 2 males, 4 females; NAMIBIA (24), Walvis Bay , 25–26. i.1972, 4 males (1 MNRJ, 1 OUMNH) ; 9 females (1 MNRJ, 1 OUMNH); NAMIBIA (27), E. Swakopmund, 30. i.1972, 3 males, 1 female ; SOUTH AFRICA, (13), Die Panne N. R., Cape Province, 5–6. i.1972, 1 female ( MNRJ) .

Diagnosis. Arista short, almost bare; facial edge of male projecting; postsutural dorsocentrals 4; fore tibia without a long posterior median seta; abdomen uniformly grey dusted with no dark spots.

Description. Male. Body length: 3.5–3.8 mm; wing length: 3.3–3.6

Female: Body length: 3.5–4.5 mm; wing length: 3.2–4.3

Head. Grey pollinose; frons of male narrower than that of the female; male with frons projecting at level of antennal insertion; postpedicel short, about 1.2 times the pedicel length; female with frons not projecting and postpedicel longer than in male; arista short, almost bare.

Thorax. General colour brown with grey pollinosity; scutum uniformly grey; postsutural dorsocentrals 4, the first two a little shorter than the two posterior ones; lower katepisternal seta present but very short, inserted closer to the posterior one; fore tibia without a long posterior median seta; mid femur with 2 preapical posterior setae; mid tibia with 2 posterior setae; wing with no setulae, except along costal vein.

Abdomen. General colour brown with grey pollinosity; sternite 1 bare; sternite 5 with medium sized setae on disc ( Fig. 5 ).

Terminalia. Cercal plate heart-shaped and surstylus long as in Fig 6 ; cercal plate resembling that of a species of Limnophora ; surstylus large in lateral view ( Fig. 7 ). Aedeagal complex as in Fig. 8 ; hypandrium “U” shaped.

Distribution. Namibia and Republic of South Africa.

Etymology. The specific name is a reference to the unusually short arista.

Remarks. In Emden’s (1951) key the new species runs to S. fuscotriangulata Emden at couplet 27, but differs by the unspotted abdomen.

Figures

FIGURES 1 – 16. Male terminalia of African Spilogona. Spilogona biguttata Emden, paratype male: (1) sternite 5, dorsal view; (2) cercal plate and surstylus, dorsal view; (3) cercal plate and surstylus, lateral view; (4) aedeagal complex, lateral view. Spilogona breviaristata sp. nov., paratype male: (5) sternite 5, dorsal view; (6) cercal plate and surstylus, dorsal view; (7) surstylus, lateral view; (8) aedeagal complex, lateral view. Spilogona fuscotriangulata Emden, male: (9) sternite 5, dorsal view; (10) cercal plate and surstylus, dorsal view; (11) cercal plate and surstylus, lateral view; (12) aedeagal complex, lateral view. Spilogona natalensis Zielke, male: (13) sternite 5, dorsal view; (14) cercal plate and surstylus, dorsal view; (15) cercal plate and surstylus, lateral view; (16) aedeagal complex, lateral view.