Walckenaeria subspiralis Millidge, 1983*

Marusik, Yuri M. & Nekhaeva, Anna A., 2020, New data on spiders (Arachnida, Aranei) of Kamchatka, Russia, Acta Biologica Sibirica 6, pp. 649-668 : 649

Walckenaeria subspiralis Millidge, 1983*

Figs 6D-E, I

Material.

1♀ 1♂ [Agi].

Note.

There are three very similar species that are indistinguishable by their male palps and in some cases even by the epigynes: Walckenaeria spiralis (Emerton, 1882), W. microspiralis Millidge, 1893 and W. subspiralis . The epigyne of our specimen is similar to those of both W. subspiralis (known across the Nearctic north to southern North-West Territories) and W. microspiralis (known from the New England only). Based purely on the distribution, we suspect that the Kamchatka specimens belong to W. subspiralis . Walckenaeria spiralis was reported from the vicinity of Magadan ( Marusik et al. 1992) based on a single male (YM, personal data) and this record could also belong to the same species. This species is new to Kamchatka, Russia and the entire Palaearctic.

Figures

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.