Atherigona, Rondani, 1856

Deeming, John C. & Kirk-Spriggs, Ashley H., 2024, A contribution to the knowledge of Namibian Atherigona Rondani (Diptera: Muscidae), with the descriptions of four new species and two new subspecies, Zootaxa 5536 (4), pp. 501-535 : 504

Key to Afrotropical species of Atherigona sensu stricto with vibrissa pale yellow

1. Male with median lobe of trifoliate process (viewed in profile) roundly expanded medially, narrow basally and at apex ( Deeming 1971: 174, fig. 122); hypopygial prominence roundly rectangular in caudal view, developed into small, tooth-like projection at two dorsal angles (ibid., fig. 123)..................................................... vibrissana Deeming, 1971

– Without above combination of characters.................................................................. 2

2. Male with virtually entire thoracic pleura bright yellow, only anatergite infuscate; fore basitarsus with row of 4–5 fine anterior and posterior setulae longer than tarsal diameter; trifoliate process and hypopygial prominence as illustrated in Figs 9–12 .................................................................................. mulleri Deeming , sp. nov.

– Male with thoracic pleura more extensively infuscate; fore basitarsus not as described above; trifoliate process and hypopygial prominence not as illustrated above....................................................................... 3

3. Male with hypopygial prominence in caudal view trapezoidally bilobed, broadest above with deep medial emargination below ( Deeming 1971: 154, fig. 40); frontal vitta of two forms, either yellow or black (aberrant colour form with yellow frontal vitta).................................................................................. secrecauda Séguy

– Male with hypopygial prominence not as described above; frontal vitta not of two colour forms....................... 4

4. Male with trifoliate process with stem paler than lobes ( Muller 2015: 915, figs 46a, b), median lobe broadly heart-shaped in dorsal view (ibid., fig. 46a), very broad in profile (ibid., fig. 46b)............................... chrysohypene Muller

– Male with trifoliate process black throughout, median lobe in dorsal view not exceeding 2 × width of stem (e. g., Muller 2015: 910, figs 5a, 6a)...................................................................................... 5

5. Male with trifoliate process with median lobe narrow, apex developed into heart shape ( Muller 2015: 910, fig. 5a), stem in profile bent at right angle at 3 / 5 length (ibid., fig. 5b), lateral lobes apically rounded (ibid., fig. 5b); male without modified setae on fore basitarsus; female with small, rounded tergal maculae; female tergite 8 with anterior margin with 3 lobes almost equal in length, their apices not conspicuously infuscate ( Fig. 24 )...................................... angulata Deeming

– Male with trifoliate process in profile gently curved throughout length ( Muller 2015: 910, fig. 6b), lateral lobe viewed ventrally appearing obliquely truncate (ibid., fig, 6a); male sometimes with long, curling, irregular setulae on fore tarsus; female with larger tergal maculae tending to become triangular; female tergite 8 at anterior margin with lateral lobes much longer than median, apices of all three lobes distinctly infuscate ( Fig. 28 )................................... pulla (Wiedemann) 1

Figures

FIGURES 1–23. Male terminalia of Atherigona spp. (1–4) A. (s. str.) australis Deeming, sp. nov. 1. Trifoliate process, dorsal view. 2. Same, lateral view. 3. Hypopygial prominence, dorsal view. 4. Same, lateral view. (5–8). A. (s. str.) maraisi Deeming, sp. nov. 5. Trifoliate process, dorsal view. 6. Same, lateral view. 7. Hypopygial prominence, dorsal view. 8. Same, lateral view. (9–12). A. (s. str.) mulleri Deeming, sp. nov. 9. Trifoliate process, dorsal view. 10. Same, lateral view. 11. Hypopygial prominence, dorsal view. 12. Same, lateral view. (13–16). A. (s. str.) jordaensi Magoai & Muller. 13. Trifoliate process, dorsal view. 14. Same, lateral view. 15. Hypopygial prominence, dorsal view. 16. Same, lateral view. (17–20). A. (s. str.) robertsi okavango Deeming, ssp. nov. 17. Trifoliate process, dorsal view. 18. Same, lateral view. 19. Hypopygial prominence, dorsal view. 20. Same, lateral view. (21). A. (s. str.) fumivenosa Deeming, trifoliate process, lateral view. (22). A. (Acritochaeta) tsumeb Deeming, sp. nov., cercal plate, ventral view. (23). Atherigona (Acritochaeta) yorki ssp. yorki Deeming, epandrium and surstyli, left oblique view. All not to scale. Abbreviations: epand—epandrium; sp—spines; sur—surstylus.

FIGURES 24–28. Female terminalia (tergite 8) of Atherigona spp., dorsal views. 24. A. (s. str.) angulata Deeming. 25. A. (s. str.) corrugata Deeming. 26. A. (s. str.) maraisi Deeming, sp. nov. 27. A. (s. str.) parvihumilata Muller. 28. A. (s. str.) pulla (Wiedemann). All not to scale.