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

Tetraconcha annoyeri sp. n. holotype male (Central African Republic, N’Doki): 49. Stridulatory area; 50. Stridulatory file below the left tegmen; 51. Cerci and subgenital plate in dorsal view; 52. Cerci and subgenital plate in ventral view. Tetraconcha fijalkowskii sp. n. holotype male (Central African Republic, N’Doki): 53. Stridulatory area; 54. Stridulatory file below the left tegmen; 55. Cerci and subgenital plate in dorsal view; 56. Cerci and subgenital plate in ventral view. Tetraconcha omonomai sp. n. holotype male (Central African Republic, N’Doki): 57. Stridulatory area (the arrow shows the cubital areas); 58. Stridulatory file below the left tegmen; 59. Cerci and subgenital plate in dorsal view; 60. Cerci and subgenital plate in ventral view. Tetraconcha aristophanousi sp. n. holotype male (Ivory Coast, Taï Nat. Park): 61. Stridulatory area; 62. Stridulatory file below the left tegmen; 63. Cerci and subgenital plate in dorsal view; 64. Cerci and subgenital plate in ventral view.