Abstract
Crickets belonging to Teleogryllus spp. are widely distributed in East Asia and they are difficult to distinguish. In this study, a phylogenetic tree of Teleogryllus is reconstructed by COI gene, and all species can be distinguished well. The possible evolutionary histories of male genitalia, songs and life history are discussed. The result supports establishing subgenera Macroteleogryllus and Brachyteleogryllus of Teleogryllus spp. from East Asia. T. boninensis is moved to Brachyteleogryllus. The calling song of four species includes both long and short chirps, and the rest just have single chirps. The species inhabit sympatrically trend to have different type of calling song. Egg overwinter type evolved several times independently.
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