Tiunova T.M. 2024. A description of the adult male Baetis pentaphyllus Tiunova et Semenchenko, 2019 (Ephemeroptera: Baetidae) from the Russian Far East // Euroasian Entomological Journal. Vol.23. No.1: 18–21 [in English].
Federal Scientific Center of the East Asia Terrestrial Biodiversity, Far East Branch of the Russian Academy of Sciences, Prosp.100-letiya Vladivostoka 159. Vladivostok 690022 Russia. E-mail: tiunova@ibss.dvo.ru
doi 10.15298/euroasentj.23.01.02
ABSTRACT. The mayfly Baetis pentaphyllus Tiunova et Semenchenko, 2019 was described in 2019 by T. Tiunova end A. Semenchenko by holotype mature larva from Far East of Russia (type locality Bolshoi Garmakan River, Amurskaya Oblast). In this paper, the adult male, collected at the same place and date together with mature larvae, is described. Comparison of the male imago with other known species of Baetis Leach is given. Male of B. pentaphyllus Tiunova et Semenchenko can be distinguished from the close related species by the venation of the hind wing, size of the body and shape of genitalia.
KEY WORDS: Ephemeroptera, mayfly, Baetis, description, male imago, Russia.