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New Or Little-Known Species of Agyneta and Nippononeta from Asia (Aranei: Linyphiidae)

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New Or Little-Known Species of Agyneta and Nippononeta from Asia (Aranei: Linyphiidae) Arthropoda Selecta 13 (3): 165170 © ARTHROPODA SELECTA, 2004 New or little-known species of Agyneta and Nippononeta from Asia (Aranei: Linyphiidae) Íîâûå è ìàëîèçâåñòíûå âèäû Agyneta è Nippononeta èç Àçèè (Aranei: Linyphiidae) A.V. Tanasevitch À.Â. Òàíàñåâè÷ All-Russian Research Institute for Nature Protection, Ministry of the Protection of the Environment and Natural Resources of the Russian Federation. Âñåðîññèéñêèé èíñòèòóò îõðàíû ïðèðîäû ïðè Ìèíèñòåðñòâå ïðèðîäíûõ ðåñóðñîâ ÐÔ. KEY WORDS: Spiders, Linyphiidae, Agyneta, Nippononeta, new species, Altai, Russian Far East, Eastern Kazakhstan. ÊËÞ×ÅÂÛÅ ÑËÎÂÀ: Ïàóêè, Linyphiidae, Agyneta, Nippononeta, íîâûå âèäû, Àëòàé, Äàëüíèé Âîñòîê Ðîññèè, Âîñòî÷íûé Êàçàõñòàí. ABSTRACT: Two new species, Agyneta tibialis In addition, several interesting records of Agyneta sp.n. and Nippononeta embolica sp.n., are described species in Asia are provided. from the Altai Mountains, South Siberia and the Rus- sian Far East, respectively. Agyneta mongolica (Loksa, Material and Methods 1965) and A. nigra (Oi, 1960) are depicted based on new records in the Far East of Russia, while the Europe- This paper is based on the collections of Miss G. an A. simplicitarsis (Simon, 1884) is recorded in Asia Azarkina (Novosibirsk) from the Altai Mountains, of (Eastern Kazakhstan) for the first time. Drs R. Seifulina (Moscow) and E. Mikhaljova (Vladi- vostok) from the Russian Far East, as well as on my own ÐÅÇÞÌÅ: Äâà âèäà, Agyneta tibialis sp.n. (Àëòàé) material from the Maritime Province, Russia. è Nippononeta embolica sp.n. (Äàëüíèé Âîñòîê Types are deposited in the Zoological Museum of Ðîññèè), îïèñàíû êàê íîâûå äëÿ íàóêè. Ïðèâåäåíû the Moscow State University (ZMMU), whereas the ðèñóíêè è íîâûå íàõîäêè íà Äàëüíåì Âîñòîêå Ðîññèè other material is housed in the authors personal collec- âèäîâ Agyneta mongolica (Loksa, 1965) è A. nigra tion (CAT). (Oi, 1960). Åâðîïåéñêèé âèä A. simplicitarsis (Simon, 1884) âïåðâûå îáíàðóæåí â Àçèè (Âîñòî÷íûé Êàçàõñòàí). Abbreviations Introduction The following abbreviations are used in the text and figures: EP embolus proper; Mt metatarsus; TA terminal apophysis; TmI position of the metatarsal This paper provides descriptions of two new species trichobothrium. belonging to two closely related linyphiid genera, Agy- In the descriptions, chaetotaxy is given in the follow- neta Hull, 1911 and Nippononeta Eskov, 1992. ing formula: Ti I: 2-1-1-2(1). This stands for: tibia I has The genus Nippononeta, with Nippononeta kurilen- two dorsal, one pro- and one retrolateral spine, and two or sis Eskov, 1992 as the type species, was established for one ventral spine (the apical spines are herewith disre- eight species of Meioneta Hull, 1920, predominatingly garded). The sequence of leg segments in measurement from Japan and Korea [Eskov, 1992]. Further 11 conge- data is as follows: femur + patella + tibia + metatarsus + ners have since been described from Japan [Ono & Saito, tarsus. All measurements are in millimeters. Scale line in 2001]. Besides the traits mentioned by Eskov [1992], this figures = 0.1 mm, except if stated otherwise. genus is also characterised by the structure of the embo- lus, which usually shows a well-developed and some- times long (e.g., N. subnigra Ono et Saito, 2001) embolus Agyneta tibialis sp.n. proper, often with a tooth near its base, as well as by a Figs 18. fairly strongly reduced distal part of the embolus (shown MATERIAL. Holotype #, Russia, Altai Mts, Charysh Distr., by Saaristo [1973] as F-part in figs 4345). Such a Bashchelaksky Mt. Ridge, 30 km NEE of Sentelek, near Zagrikha conformation of the embolus corresponds to the structure (see Map), 1700 m, Abies forest near top, 27.VI.2000, leg. G. of the lateral lobes of the female epigyne. Azarkina (ZMMU). Paratype #, together with holotype (ZMMU). 166 A.V. Tanasevitch Map. Localities of Agyneta and Nippononeta species: u Agyneta simplicitarsis (Simon, 1884); Ë A. tibialis sp.n.; Å A. mongolica (Loksa, 1965); n A. nigra (Oi, 1960) & Nippononeta embolica sp.n. Êàðòà. Ìåñòà íàõîäîê âèäîâ Agyneta è Nippononeta: u Agyneta simplicitarsis (Simon, 1884); Ë A. tibialis sp.n.; Å A. mongolica (Loksa, 1965); n A. nigra (Oi, 1960) & Nippononeta embolica sp.n. DESCRIPTION. Male. Total length, 1.83. Carapace 0.80 laterally. Cymbium with a small posterodorsal outgrowth. long, 058 wide, dark brown. Chelicerae 0.30 long. Legs pale Posterior and anterior pockets of paracymbium fused into a brown. Leg I, 4.45 long (1.13+0.33+1.13+1.03+0.83), IV large pocket. Lamella characteristica with a serrate narrow 4.31 long (1.20+0.28+1.13+1.05+0.65). Chaetotaxy. Ti III: branch. Embolus with a deep notch in middle part; embolus 2-1-0-0; Ti IIIIV: 2-0-0-0; Mt IIV spineless. Metatarsi IV proper well-developed, with a small tooth near its base. without trichobothrium. TmI, 0.29. Palp as in Figs 18. DISTRIBUTION. Known from the type locality only. Palpal tibia with a small retrolateral tooth-shaped process, REMARK. This is the second species of the genus Nip- lamella characteristica narrow, pointed distally, with a small pononeta in the Russian fauna. branch basally. Abdomen 1.00 long, 0.50 wide, dark grey. Female unknown. Agyneta simplicitarsis (Simon, 1884) TAXONOMIC REMARKS. This species is very close to Figs 1519. A. ripariensis Tanasevitch, 1984, A. simplex (Emerton, 1926) and A. brusnewi (Kulczynski, 1908), but is well distinguished MATERIAL. 1 #, Eastern Kazakhstan, near Ust-Kamenogor- by the large retrolateral tooth-shaped process, as well as by the sk (see Map); date and collector unknown (CAT). narrower lamella characteristica. From the most closely related This species is widespread in Western Europe, with only A. ripariensis, the new species differs in shape of the patella a single reliable record in Eastern Europe, i.e. Lugansky and paracymbium (cp. Figs 3, 4 & 10; 2 & 9). Nature Reserve, Ukraine [Polchaninova, 1995]. DISTRIBUTION. Known from the type locality only. This is the first record of A. simplicitarsis in Asia. At present its distribution pattern can be considered as Euro- Nippononeta embolica sp.n. Siberian. Figs 1114. Agyneta mongolica (Loksa, 1965) MATERIAL. Holotype #, Russia, Maritime Province, Figs 2025. Chernigovka District, near Dmitrievka (see Map), deciduous forest on hill, litter, 2430.VII.1990, leg. A. Tanasevitch (ZMMU). MATERIAL. 3 ##, Russia, Amurskaya Area, near Tambovka DESCRIPTION. The holotype being quite strongly dam- (ca 50 km SE of Blagoveshchensk, see Map), Muravyovsky Park, aged, the description will be incompleted. Male. Body very 2001, leg. R. Seifulina (CAT). pale, abdomen with an ambiguous dorsal pattern. Chaetot- In Russia, this species has been recorded in two places axy. Ti III 2-0-1-0, IIIIV: 2-0-0-0. Metatarsi spineless. only: Bolshekhekhtsyrsky Nature Reserve and Verkhne-Bure- TmI, ?. Metatarsus IV without trichobothrium. Palp as in insky Nature Reserve, both in the Khabarovsk Province [Esk- Figs 1114. Patella with a sharp tooth-shaped process retro- ov, 1992; Tanasevitch & Trilikauskas, 2004, respectively]. New or little-known species of Agyneta and Nippononeta from Asia 167 Figs 110. Details of palp structure in Agyneta tibialis sp.n. (18) and A. ripariensis Tanasevitch, 1984 (9, 10): 1 right palp; 2, 9 paracymbium; 3, 4, 10 palpal tibia, dorsal view; 5 embolic division; 68 lamella characteristica. Ðèñ. 110. Äåòàëè ñòðîåíèÿ ïàëüïû Agyneta tibialis sp.n. (18) è A. ripariensis Tanasevitch, 1984 (9, 10): 1 ïðàâàÿ ïàëüïà; 2, 9 ïàðàöèìáèóì; 3, 4, 10 ãîëåíü ïàëüïû, ñâåðõó; 5 ýìáîëþñíûé îòäåë; 68 ëàìåëëà õàðàêòåðèñòèêà. 168 A.V. Tanasevitch Figs 1119. Details of palp structure in Nippononeta embolica sp.n. (1114) and Agyneta simplicitarsis (Simon, 1884) (1519): 11, 15 right palp; 12, 16 palpal tibia and paracymbium, retrolateral view; 13, 18 embolic division; 14, 19 lamella characteristica; 17 palpal tibia, dorsal view. Ðèñ. 1119. Äåòàëè ñòðîåíèÿ ïàëüïû Nippononeta embolica sp.n. (1114) è Agyneta simplicitarsis (Simon, 1884) (1519): 11, 15 ïðàâàÿ ïàëüïà; 12, 16 ãîëåíü ïàëüïû ñ ïàðàöèìáèóìîì, ðåòðîëàòåðàëüíî; 13, 18 ýìáîëþñíûé îòäåë; 14, 19 ëàìåëëà õàðàêòåðèñòèêà; 17 ãîëåíü ïàëüïû, ñâåðõó. New or little-known species of Agyneta and Nippononeta from Asia 169 Figs 2030. Details of palp structure in Agyneta mongolica (Loksa, 1965) (2025) and A. nigra (Oi, 1960) (2630): 20, 26 right palp; 21, 22 palpal tibia, dorsal and retrolateral views, respectively; 23 paracymbium; 24, 27 embolic division; 25, 28 30 lamella characteristica. Ðèñ. 2030. Äåòàëè ñòðîåíèÿ ïàëüïû Agyneta mongolica (Loksa, 1965) (2025) è A. nigra (Oi, 1960) (2630): 20, 26 ïðàâàÿ ïàëüïà; 21, 22 ãîëåíü ïàëüïû, ñîîòâåòñòâåííî äîðñàëüíî è ðåòðîëàòåðàëüíî; 23 ïàðàöèìáèóì; 24, 27 ýìáîëþñíûé îòäåë; 25, 2830 ëàìåëëà õàðàêòåðèñòèêà. 170 A.V. Tanasevitch BRIEF DESCRIPTION. Male palp as in Figs 2025. whose material has been used in this paper, as well as to Palpal tibia apically with a serrate outgrowth directed retro- Michael Saaristo (Turku, Finland) for some useful advice on laterally. Cymbium without conical elevation. Posterior pocket the taxonomy of the Agyneta clade of micronetines. Sergei of paracymbium well-sclerotised, tooth-shaped. Embolus Golovatch kindly edited the English of an advanced draft. basally with a hook-like outgrowth, lamella characteristica gradually constricted proximally; apical part thin and sharp. Female unknown. References DISTRIBUTION. Mongolia; Russia: Far East. Eskov K.Y. 1992. A restudy of the generic composition of the Agyneta nigra (Oi, 1960) linyphiid spider fauna of the Far East (Araneida: Linyphi- Figs 2630. idae) // Entomologica scand. Vol.23. P.153168. Ono H., Saito H. 2001. New species of the family Linyphiidae (Arachnida, Araneae) from Japan // Bull. natn. Sci. Mus. MATERIAL. 1 #, Russia, Maritime Province, Chernigovka Tokyo. Ser.A. Vol.27. P.159203. Distr., Dmitrievka (see Map), soya field, 14.VII.1988, leg. E. Polchaninova N.Y. 1995. [Araneofauna of the "Streltsovkaya Mikhaljova (CAT). Steppe" (Lugansk Area) and its place in the fauna of protected DISTRIBUTION. Japan, Korea, China, Mongolia. In steppe territories] // Problemy sokhraneniya raznoobraziya Russia, this species is known from the Far East, East Siberia prirody stepnykh i lesostepnykh regionov.
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