Bioacoustics of Angaracris barabensis

Distribution . Kazakhstan (north and central part: Kostanay region, Akmola region, Pavlodar region, Kent Mountains, Karsakpay Plateau), Russia (south part of Ural and Siberia: Orenburgskaya oblast, Omskaya oblast, Novosibirskaya oblast, Kemerovskaya oblast, Altaisky krai, Altai Republic , south part of Krasnoyarskiy krai, Republic of Khakassia , Tyva Republic [= Tuva ], Irkutskaya oblast, Republic of Buryatia , Zabaikalskiy krai), Mongolia ( Uvs aimag, Zavkhan aimag, Gov aimag, Khovsogol aimag, Bayankhongor aimag, Bulgan aimag, Ovorkhangay aimag, Dongov aimag, Omnogov aimag, Dornogo aimag, Tov aimag, Khentiy aimag, Dorod aimag), China (Qinhai province, Gansu province , Shaanxi province , Shanxi province , Heilongjiang province , Nei Mongol Zizhiqu, Xizang Zizhiqu). Notes . While the presence of two color forms of hind wings occurs in some species of Oedipodinae , for example in Mioscirtus wagneri (Eversmann, 1849) ( Huang et al ., 2013 ) , but during long time the hyaline and reddish forms of Angaracris was considered as distinct species or subspecies. The presence of transitional forms, the similarity in the acoustic signals of males, absence of differences in the structure of the male genitalia, and the same localization of C-heterochromatic blocks in chromosomes show that A. rhodopa is synonym of A. barabensis ( Benediktov, 1998 ) . In 1981–1998 seven new species of Angaracris was described from North and Central China, each based on a single holotype or a few (3–4) type specimens. These species were again distinguished mainly by the color and pattern of hind wings. The most different forms with hyaline, reddish and almost completely black membrane of hind wings have been synonymized recently (Childebaev et al ., 2013). The investigation of variability of the hind wings color and pattern in the tribe Bryodemini is made by the second author and it was found that A. barabenis is one of the most variable species ( Benediktov, 2016 ). Here we considered other six Chinese species as synonyms of A. barabenis .