On the desmitracheate " micronetine " genus Nippononeta Eskov, 1992 (Araneae, Linyphiidae) Author Yan, Ming Author Liang, Xiaokai Author Tu, Lihong text ZooKeys 2015 484 95 109 http://dx.doi.org/10.3897/zookeys.484.8663 journal article http://dx.doi.org/10.3897/zookeys.484.8663 1313-2970-484-95 3EA658E472A34A6F98CF776FE7E7A0AB Taxon classification Animalia Araneae Linyphiidae Nippononeta kurilensis Eskov, 1992 Nippononeta kurilensis Eskov, 1992: 159, f. 27-30 (Dmf); Ono et al. 2009 : 318, f. 899-902 (mf). Material examined. 1♂ and 1♀ (CNU), Russia, Sakhalin Island, near Novoalexandrovsk, 11 Sept. 1992, A. Basarukin leg. Diagnosis. The male of Nippononeta kurilensis is distinguished from Nippononeta coreana and all other Nippononeta species by: 1) the absence of proximal tibial process (Fig. 1A, D), present in the latter (Fig. 4 A-B ); 2) the outer margin fold of the U-shaped paracymbium is continued with the distal arm in Nippononeta kurilensis (Fig. 1A, D), only a small pointed tooth in Nippononeta coreana (Fig. 4 A-B ); 3) the anterior sclerites of lamella characteristica with smooth margin in Nippononeta kurilensis (Fig. 1F), while that in Nippononeta coreana serrated (Fig. 4D), and 4) the single embolus basal tooth hook-shaped in Nippononeta kurilensis (Fig. 1F), whereas in Nippononeta coreana the embolus has three basal teeth, one of them spine-like (Fig. 4E). The female can be distinguished by the appearance of epigynum: diamond shaped in Nippononeta kurilensis (Fig. 2A), T-shaped in Nippononeta coreana (Fig. 5). Figure 4. Nippononeta coreana . A-F male palp. A retrolateral, arrow indicates outer margin tooth B detail of A, arrow indicates outer margin tooth C ventral D detail of C E embolic division, ventral F embolus, dorsal G male body with soft tissues digested, shows tracheal system H anterior part of male abdomen, ventral, shows epiandrous gland spigots absent. ARP anterior radical process; AX apex of embolus; DTA distal tibial apophysis; E embolus; EBT embolus basal teeth; EC embolus column; EM embolic membrane; EP embolus proper; LC lamella characteristica; P paracymbium; PF proximal cymbial fold; PH pit hook; PHS pit hook sclerite; PTP proximal tibial process; R radix; RTP retrolateral tibial process; TA terminal apophysis; TH thumb of embolus. Figure 5. Nippononeta coreana , epigynum. A ventrolateral B dorsal C caudal D anterior, with soft tissues digested. CG copulatory groove; DP dorsal plate; LL lateral lobe on sacpe; SC scape; ST stretcher; TDF transversal dorsal fold of epigynum; VP ventral plate. Description. Somatic and genital characters as in the genus description. Distribution. Russia (Sakhalin, South Kuril Islands) and Japan (Hokkaido).