New data on spiders (Arachnida, Aranei) of Kamchatka, Russia Author Marusik, Yuri M. https://orcid.org/0000-0002-4499-5148 Institute for Biological Problems of the North RAS, Portovaya Str. 18, Magadan, 685000, Russia & Department of Zoology & Entomology, University of the Free State, Bloemfontein 9300, South Africa & Zoological Museum, Biodiversity Unit, FI- 20014 University of Turku, Finland Author Nekhaeva, Anna A. https://orcid.org/0000-0002-4972-2122 A. N. Severtsov Institute of Ecology and Evolution, Russian Academy of Sciences, Leninsky pr. 33, Moscow, 119071, Russia adrealinea@gmail.com text Acta Biologica Sibirica 2020 2020-12-22 6 649 668 http://dx.doi.org/10.3897/abs.6.e60005 journal article http://dx.doi.org/10.3897/abs.6.e60005 2412-1908-6-649 53A3A4F976084176BD55CF1844A58B5C 8B3F9149AA3E5D3E88CD31671C125E36 Kolymocyba petrophila Eskov, 1989** Fig. 6A-C, F-H Kolymocyba petrophila Eskov, 1989: 75, f. 5.1-5 (♂♀). Material. 3♀ 1♂ [ XX ]. Note. It is the type species of the monotypic genus that is known from the single taxonomic entry. In order to provide more detailed data about its morphology, we provide SEM images of its male palp and epigyne have been presented. The original figures by Eskov (1989) do not show the complex shape of the radix as if having only a single apophysis, despite it having a small posterior ( Rp ) and a larger anterior ( Ra ) apophyses and a very short tailpiece ( Tp ). Numerous fine teeth on the terminal part of the suprategular apophysis ( Sa ) were not shown as well as the large median membrane ( Mm ). The epigyne in light microscope (Fig. 6H ) looks like the one illustrated by Eskov (1989) . This species and genus are new to Kamchatka. It was known from Magadan Area ( Marusik et al. 1992 ; Mikhailov 2013 ) only and the record from Kamchatka lies at the south-easternmost limit of its range. Figure 6. Copulatory organs of Kolymocyba petrophila ( A-C , F-H ) and Walckenaeria microspiralis ( D-E , I ). A -C terminal part of male palp, prolateral, antero-prolateral and ventral; D , F whole male palp, retrolateral; E whole male palp, dorso-retrolateral showing dorsal tibial apophysis; G-I epigyne, ventral. Scale = 0.1 mm if not otherwise indicated. Abbreviations: Em - embolus, Mm - median membrane, Ra - anterior radix apophysis, Rp - posterior radix apophysis, Sa - suprategular apophysis, Tp - tailpiece of embolic division.