Platypsyllus castoris Ritsema, 1869 (Fig 1) Material examined. Only adults: 1♂, 2♀♀, Russia: Western Siberia, Altai Krai, Kytmanovsky Distr., env. Sosnovy Log vill., Kamenka River, on beaver, 23 Aug 2019, coll. F. Budaev, IBIW RAS; 2♂♂, 5♀♀, same place, env. Staraya Taraba vill., Balakhcha River, on beaver, 27 July 2020, coll. F. Budaev, BPC. Distribution. The species have Holarctic distribution. In North America species know from Canada, United States (Peck, 2006), in Palaearctic Platypsyllus castoris recorded for Europe (Belgium, Belarus, The Czech Republic, France, Germany, Latvia, The Netherlands, Norway, Poland, Slovakia, Sweden and Switzerland) (Perreau 2015) and the European part of Russia, where the species is known from Voronezh (Prokin & Kirejtshuk 2007), Rostov (Arzanov et al. 2013) and Saratov (Sazhnev et al. 2019) Oblasts.

Published as part of SAZHNEV, Alexey S. & BUDAEV, Fyodor A., 2020, First record of Platypsyllus castoris Ritsema, 1869 (Coleoptera: Leiodidae) from Siberia, pp. 125-127 in Fragmenta Faunistica 63 (2) on pages 125-126, DOI: 10.3161/00159301FF2020.63.2.125, http://zenodo.org/record/6252527