A new species of bristletail of the genus Allopsontus (Microcoryphia: Machilidae) from Dagestan (Russia)

The South Palaearctic genus Allopsontus Silvestri, 1911 includes 32 described species belonging to 8 subgenera and distributed in mountain steppes, dry steppes and semi-deserts from Armenia and Israel in the west to Mongolia and Shaanxi province in China in the east and from the Samara region and the Southern Urals in Russia in the north to Pakistan, Northern India, Tibet and Nepal in the south [Kaplin, 1993]. Four species of the genus Allopsontus were previously known from the Caucasus namely Allopsontus (Kaplinilis) abkhazicus Kaplin, 2017 (Great Caucasus, Abkhazia), A. (Allopsontus) armenicus (Mendes, 1983), A. (Allopsontinus) caucasicus (Kaplin, 1990) (Armenian Plateau, Armenia), A. (Anisoptinus) borgustani Kaplin, 2015 (northern foothills of the Great Caucasus, Kislovodsk, Russia) [Mendes, 1983; Kaplin, 1990, 2015, 2017]. Examination of the bristletails collected in Dagestan (Tsumadinsky District) has revealed a new species of this genus; its description is given below.