Aphengium Harold

Silva, Fernando A. B. & Vaz-De-Mello, Fernando, 2015, A revision of the genus Aphengium Harold, 1868 (Coleoptera: Scarabaeidae: Scarabaeinae: Ateuchini), Zootaxa 3955 (4), pp. 505-520 : 507-508

Key to males of Aphengium Harold

1. Dorsal surface of head with dense foveiform punctures deeply impressed and often rounded ( Figs. 9 , 15 , 21 ). Anterolateral portion of pronotum lacking sleek callus............................................................... 2

- Dorsal surface of head smooth and sleek or punctures almost inconspicuous ( Fig. 27 ). Anterolateral portion of pronotum with a longitudinal and sleek callus ( Fig. 29 ). Male genitalia figs. 34, 40. Brazil (Bahia)..... A. curtum sp. nov. ( Fig. 25 ).

2. Dorsal surface of head with contiguous foveiform punctures over its central portion ( Figs. 9 , 21 ). Anterolateral margin of pronotum explanate ( Figs. 11 , 23 ).................................................................... 3

- Dorsal surface of head with foveiform punctures separated by distance equivalent to at least two times puncture diameter along most of midline ( Fig. 15 ). Anterolateral margin of pronotum not explanate ( Fig. 17 ). Male genitalia figs. 32, 36, 38. Brazil (Espírito Santo and Minas Gerais).......................................... A. cupreum Shipp ( Fig. 13 ).

3. Pronotum with larger and contiguous foveiform punctures on lateral and posterior portions ( Fig. 11 ). Length of parameres one-half that of phallobase ( Fig. 31 ); apical third of parameres slightly narrowed ( Fig. 31 ); fronto-lateral peripheral sclerite (FLP) as in figure 37. Brazil (Rio de Janeiro and São Paulo).......................... A. sordidum Harold ( Fig. 7 ).

- Foveiform punctures of lateral and posterior portions of pronotum not contiguous, usually separated by distance equivalent to less than one puncture diameter ( Fig. 23 ). Length of parameres less than one-half that of phallobase ( Fig. 33 ); apical third of parameres abruptly narrowed ( Fig. 33 ); fronto-lateral peripheral sclerite (FLP) as in figure 39. Brazil (Alagoas)............................................................................. A. ibateguara sp. nov. ( Fig. 19 ).

Figures

FIGURES 7 – 12. Aphengium sordidum Harold; 7. Male (dorsal view); 8. Female (dorsal view); 9. Male head (arrow shows foveiform punctures along midline); 10. Female head (arrow shows foveiform punctures along midline); 11. Male pronotum (arrow shows punctures on central portion); 12. Female pronotum (arrow shows punctures on central portion).

FIGURES 13 – 18. Aphengium cupreum Shipp; 13. Male (dorsal view); 14. Female (dorsal view); 15. Male head; 16. Female head; 17. Male pronotum; 18. Female pronotum.

FIGURES 19 – 24. Aphengium ibateguara sp. nov.; 19. Male (dorsal view); 20. Female (dorsal view); 21. Male head; 22. Female head; 23. Male pronotum; 24. Female pronotum.

FIGURES 25 – 30. Aphengium curtum sp. nov.; 25. Male (dorsal view); 26. Female (dorsal view); 27. Male head; 28. Female head; 29. Male pronotum (arrow shows anterolateral portion of pronotum with a longitudinal and sleek callus); 30. Female pronotum.

FIGURES 31 – 34. Aedeagus of Aphengium; 31. A. sordidum (arrow shows dorsal margin of parameres curved inward at its apical third); 32. A. cupreum; 33. A. ibateguara sp. nov.; 34. A. curtum sp. nov.