Confirmation of the Subspecies Status of Dianemobius fascipes nigrofasciatus (Orthoptera, Gryllidae) Based on Bioacoustic and Morphological Data, with the Description of the Male Sounds from Southern Siberia

Resumo

The taxonomic status of Dianemobius fascipes (Walker, 1869) from Nepal (Kathmandu) and D. nigrofasciatus (Matsumura, 1904) from Japan (Akiruno City near Tokyo), Korea (Incheon near Seoul), and Russia (Novosibirsk) is discussed based on comparison of acoustic calling signals. The sounds of D. nigrofasciatus are described for the first time from the northwesternmost locality of its range in southern Siberia, Russia. The signals of males from Russia, Japan, and Korea show no differences in their amplitude-time characteristics but they differ slightly from the signals of D. fascipes from Nepal. There are no morphological differences between these taxa except for the color of the hind tibia. The male genitalia are similar, slightly differing only in the degree of development of the ectoparamere lobe. Thus we suggest that D. fascipes should be considered a polytypic species with two subspecies: the southern nominotypical subspecies D. fascipes fascipes stat. resurr., common in the Oriental Region, and the northern subspecies D. fascipes nigrofasciatus stat. resurr., known from the eastern part of the Palaearctic Region.