Revision of the tropical African genus Tetraconcha (Orthoptera: Tettigoniidae: Phaneropterinae) with the description of ten new species

Tetraconcha ruzzieri sp. n. paratype male (Ivory Coast, Taï Nat. Park): 11. Stridulatory area; 12. Stridulatory file below the left tegmen; 13. Subgenital plate in ventral view; 14. Cerci in dorsal view. Tetraconcha fenestrata holotype male (Cameroon): 15. Stridulatory area of the left tegmen; 16. Stridulatory file below the left tegmen. Tetraconcha fenestratamale (Cameroon, Mukonje Farm): 17. Subgenital plate in ventral view; 18. Cerci in dorsal view. Tetraconcha danflousi sp. n. holotype male (Ivory Coast, Taï Nat. Park): 19. Stridulatory area; 20. Stridulatory file below the left tegmen and “window” of the left tegmen; 21. Subgenital plate and cerci in ventral view; 22. Cerci in dorsal view. Figs 15 and 16 after Orthoptera Species File.