Cyclosa onoi Tanikawa, 1992

Cyclosa onoi Tanikawa, 1992 View in CoL

Figs 2, 5, 7, 10

MATERIAL. Russia: Primorsky Krai, Shkotovsky District, Anisimovka village (= Kangauz railway station), 12.VII 1968, 1♂, leg. F.Z. Popov.

DIAGNOSIS. Habitus of our specimen (Fig. 2) well agrees with original description of this species ( Tanikawa, 1992b). Palp as in Figs. 5, 10. Median apophysis of male palp (Fig. 7) basally has wing-shaped lamella. Distally median apophysis bent and bifurcated, while teeth are closely spaced or the bifurcation is not clear ( Tanikawa, 1992b). Terminal apophysis has wide base and narrow distal part, which form a furrow. Embolus basally wide and slightly narrows along entire length. Embolus has two bends – in the middle and closer to the end. Distal part of conductor is rather wide and round, with narrow notch at the tip.

REMARKS. Males of C. onoi differ from C. oculata by roundish shape of palpal conductor as well as the shape of median apophysis, smooth and rounded in C. oculata (Figs 6, 11) and more abrupt and angular in C. onoi (Figs 5, 7, 10). Palpal median apophysis of C. onoi basally has only a wing-shaped lamella, whereas C. oculata has a digitiform appendix along with a wing-shaped lamella ( Tanikawa, 1992b). During comparison of specimens of these species, we found that this trait cannot be considered as absolutely reliable, because appearance of these structures depends on an observation angle.

ECOLOGY. Species inhabits mountainous areas ( Song et al., 1999). DISTRIBUTION. Russia: Sakhalinskaya Oblast ( Vertyankin et al., 2023), Primorsky

Krai (new record). – East China, Japan ( Tanikawa, 1992b; Zhu & Zhang, 2011; Yin et al.,

2012), Korea ( Lee et al., 2022).