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The genus    Ectadia    is an East Asian genus of the tribe   Elimaeini   (  Phaneropterinae  ) and is known for the complex stridulatory files of its members. The calling song was so far known from only one species, the relatively widespread    Ectadia   fulva   . Here a new species from Yunnan, China, is described, which is morphologically similar to    E.   fulva    except for the stridulatory file. In this character    E.   fulva    deviates strongly from the new species and from all other    Ectadia    species by its high tooth number. The long lasting song (duration 30 to 60 seconds at 25°C) of the new species is very complex and differs widely from the much shorter song of    E.   fulva   . Its spectral composition changes during stridulation. In the new species the females respond acoustically during gaps in the final part of the male song, whereas in    E.   fulva    they answer typically after the male song. During mating    Ectadia   fulva    males transfer small spermatophores without spermatophylax. All of its six nymphal stages are cryptically colored. In karyotype the new species being the first studied    Ectadia    species is similar to the related genera    Elimaea    and    Ducetia    (all 2n=29 chromosomes in the male).

journal of orthoptera research

The genus    Ectadia    (  Orthoptera  :   Phaneropteridae  :   Phaneropterinae  ) in East Asia: description of a new species, comparison of its complex song and duetting behavior with that of    E.   fulva    and notes on the biology of    E.   fulva