Abstract
This study focuses on chromosomes and karyotypes of eight species of Tettigoniidae, which selected in Northeast China. And clustering analysis of these eight species was studied based on their chromosomal relative lengths for the first time. In the males, chromosome numbers vary from 2n = 31 (%) to 2n = 25 (%) and Fundamental Numbers (FN) from 32 to 28. All the species have the basic Orthopteran sex determining mechanism XX&/ X0%. The results of clustering analysis showed that the eight Tettigoniidae species form three well-supported groups when Rescaled Distance is 15, which include (1) the genus Gampsocleis and Metrioptera, (2) the genus Tettigonia and (3) the genus Paratlanticus. In particular, the morphology close species of G. sedakovii obscura and G. sedakovii sedkovii is strongly supported. The relationships among the eight species is as follows, (((G. sedakovii obscura, G. sedakovii sedkovii), G. ussuriensis), M. bonneti), ((T. cantans, T. ussuriana), T. caudata), P. tsushimensis.
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