Acoustic signals in katydids (Orthoptera, Tettigonidae). Communication I

Original and literature data on acoustic signals of katydids of the families Bradyporidae, Conocephalidae, Tettigoniidae, Phaneropteridae, Pseudophyllidae, Mecopodidae and Meconematidae are analyzed. A scheme of possible evolutionary trends in the transformation of the temporal pattern of calling signals in the tribe Platycleidini (Tettigoniidae, Decticinae) is proposed. A comparative analysis of acoustic signals in Phaneropteridae of the world fauna and in Bradyporidae from the Mediterranean, Africa, and Asia is performed. Oscillograms and frequency spectra of calling songs are published for the first time for the following species: some representatives of the genus Mecopoda, Schizonotinus kerketa, Sch. forficalis, Onconotus laxmanni, and O. servillei; oscillograms of calling sounds of Euconocercus iris, Polysarcus zacharovi, and Phaneroptera spinosa, and of other intraspecific signals of representatives of the genus Phaneroptera are also represented for the first time.