Atherigona (Atherigona) angolaensis Magoai, 2025

Magoai, Mokome M. J., Muller, Burgert S. & Bellingan, Terence A., 2025, A contribution to the Atherigona (Diptera, Muscidae) fauna of Angola, African Invertebrates 66 (2), pp. 209-227 : 209-227

Atherigona (Atherigona) angolaensis Magoai sp. nov.

Figs 6 , 10

Type material examined.

Holotype: Angola • 1 ♂; Moxico, Lungwebungu, Riverbank , 12°35'3.32"S, 18°40'4.87"E, 9–11 Nov. 2022, T. A. Bellingan leg., Malaise trap; AMGS -ENT 101808 .

Type condition.

The holotype is in poor condition, with all legs except for left foreleg, right middle leg, and right hind leg missing. The trifoliate process and right middle leg are stored in a genital vial underneath the specimen.

Deposition information.

Holotype is deposited in AMGS.

Diagnosis.

Atherigona angolaensis Magoai , sp. nov. has an overall brown appearance. The species is most similar to Atherigona ochripes Deeming, 1981 , in overall appearance, with yellow fore femur and predominantly yellow palpi, sometimes with infuscated base, as well as infuscated frontal vitta. However, it differs by having a widely knob-shaped hypopygial prominence with a pair of very weakly developed posteriorly projecting processes compared to these being truncated and emarginated in A. ochripes .

Description.

Measurements (Holotype): Body length: 3.95 mm, wing: 3.14 mm, r – m crossvein ratio: 0.43.

Male. Head: Ground colour brown; all head setae and setulae infuscated; frontal plate, ocellar triangle, and upper occiput silver-grey dusted; upper occiput with narrow median part glossy; lower occiput golden-grey dusted near bottom edge surrounding mouthparts; frontal plate with three pairs of proclinate frontal setae: one weak near frontal angle and two stronger, also with two pairs of reclinate orbital setae; frontal vitta infuscated; parafacial silver-grey except for small area near frontal angle and where it meets frontal plate, which is golden-grey dusted; parafacial at narrowest wider than aristal base; scape and pedicel mostly ferruginous, pedicel with some infuscation dorsally; postpedicel infuscated for the most part except for narrow ferruginous basal margin; arista dark brown; palpus yellow with infuscated base; palpal base with infuscate setae: four strong and two weaker; vibrissal angle with four well-developed vibrissal setae surrounded by seven setulae.

Thorax: Ground colour brown; postpronotal lobe golden-grey dusted, lobe with three setae: one strong and two weak, and 16 setulae; scutum silver-grey dusted with some gold-grey dusted areas throughout, with three faint dorsocentral vittae not extending to the scutellum; scutellum silver-grey dusted dorsally with apical margins golden-grey dusted; one pair of basal setae, one pair of discal setae and 13 discal setulae, one pair of subbasal setae and one pair of apical setae, subbasal and apical pair subequal; pleura golden-grey dusted; proepimeron without conspicuous process, with two setae, one stronger than the other, and one setula; katepisternal setae 1: 1: 1 and with a row of small setulae running down below anterior seta towards ventral margin of katepisternum; bottom katepisternal seta situated closer to posterior seta than anterior seta.

Legs: Coxae yellow, with fore coxa lightly whitish dusted; all legs yellow except apical half of fore tibia lightly infuscated as well as majority of fore tarsi; without any specialized chaetotaxy.

Wings: Hyaline; veins light-brown; halter with white knob and yellow stalk; calypters somewhat light-brown.

Abdomen: All tergites and sternites yellow and without dorsal median vittae; tergite 1 + 2 immaculate; tergite 3 with two large spots; tergite 4 with two small spots, lightly whitish dusted on dorsal surface; tergite 5 immaculate.

Terminalia: Hypopygial prominence widely knob-shaped with a pair of very weakly developed posteriorly projecting processes. Trifoliate process with stem and hood hyaline, median piece and lateral plates infuscated with hyaline bases. Median piece in posterior view moderately dilated at apex, somewhat club-shaped with clear apical emargination and with short setulae apically; median piece without any dilation in profile; lateral plates wider than the median piece in posterior view and in profile; inner lobes not present. Surstylus not infuscated.

Female. Unknown.

Etymology.

Named after the type locality country, Angola. Feminine adjective in the nominative singular case.

Distribution.

Angola.

Figures

Figures 3–7. Atherigona species: 3. Lateral habitus Atherigona adelinahae sp. nov. holotype male; 4. Lateral habitus Atherigona adelinahae sp. nov. paratype female; 5. Posterodorsal view of Atherigona adelinahae sp. nov. paratype female abdomen; 6. Lateral habitus of Atherigona angolaensis sp. nov. holotype male; 7. Lateral habitus of Atherigona cuanavaleensis sp. nov. holotype male. Scale bars: 1 mm.

Figures 8–19. Trifoliate process and hypopygial prominence of 8. A. adelinahae sp. nov.; 9. A. albistyla; 10. A. angolaensis sp. nov.; 11. A. bedfordi; 12. A. campestris; 13. A. cuanavaleensis sp. nov.; 14. A. laevigata; 15. A. lineata ssp. lineata; 16. A. lineata ugandae; 17. A. matilei; 18. A. mirabilis ssp. mirabilis; 19. A. ruficornis. Trifoliate process: a posterior view b profile. Hypopygial prominence c dorsal view d posterior view e profile f female tergite 8. (17, 19 adapted from Muller (2015), 11, 12, 15, 18 adapted from Muller and Mostovski (2018), 14, 16 adapted from Magoai and Muller (2024)).