New genera and new species of Acrometopini (Orthoptera: Tettigonioidea Phaneropterinae) from East Africa and a review of all known stridulatory organs, songs and karyotypes of the tribe

Abstract

Two new genera of East African Acrometopini are erected: the monotypicPeronurellan. gen. withP. centralisn. sp. from Miombo woodlands in central Tanzania, andTenerasphagan. gen. for a morphological uniform group of species formerly included inHoratosphaga,T. chyuluensisn. sp.,T. mbulun. sp.T. nanyuki,T. nudan. comb,T. meruensisn. comb,T. teneran. comb andT. bazeletaen. comb. Additional species are described in the generaAltihoratosphaga,LamecosomaandPeronura. Keys to African genera of Acrometopini and species of the genusTenerasphagaare provided. We review the male calling songs and the morphology of the acoustical apparatus and discuss how the morphology of the stridulatory files explains the complicated song patterns and elements. All Acrometopini species showed a plesiomorphic karyotype with a diploid chromosome number of 2n = 31 and a X0 sex chromosome system in males.