A New Species of the Genus Macrargus (Araneae, Linyphiidae, Micronetinae) from the North-East of Ukraine and Redescription of Two Related Species

Macrargus sumyensis Gnelitsa et Koponen, sp. n. is described from the North-East of Ukraine. Two closely related species of the genus Macrargus Dahl, 1886, Macrargus boreus Holm, 1968 and M. multesimus (O.-P. Cambridge, 1875), are redescribed and illustrated in detail.

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Дата:2010
Автори: Gnelitsa, V.A., Koponen, S.
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Опубліковано: Інститут зоології ім. І.І. Шмальгаузена НАН України 2010
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Цитувати:A New Species of the Genus Macrargus (Araneae, Linyphiidae, Micronetinae) from the North-East of Ukraine and Redescription of Two Related Species / V.A. Gnelitsa, S. Koponen // Вестник зоологии. — 2010. — Т. 44, № 4. — С. 291–299. — Бібліогр.: 27 назв. — англ.

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Digital Library of Periodicals of National Academy of Sciences of Ukraine
id irk-123456789-65703
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spelling irk-123456789-657032014-07-01T03:01:34Z A New Species of the Genus Macrargus (Araneae, Linyphiidae, Micronetinae) from the North-East of Ukraine and Redescription of Two Related Species Gnelitsa, V.A. Koponen, S. Фауна и систематика Macrargus sumyensis Gnelitsa et Koponen, sp. n. is described from the North-East of Ukraine. Two closely related species of the genus Macrargus Dahl, 1886, Macrargus boreus Holm, 1968 and M. multesimus (O.-P. Cambridge, 1875), are redescribed and illustrated in detail. С северо-востока Украины описан Macrargus sumyensis Gnelitsa and Koponen, sp. n. Переописаны и детально проиллюстрированы два близких вида рода Macrargus Dahl, 1886: M. boreus Holm, 1968 и M. multesimus (O.-P. Cambridge, 1875). 2010 Article A New Species of the Genus Macrargus (Araneae, Linyphiidae, Micronetinae) from the North-East of Ukraine and Redescription of Two Related Species / V.A. Gnelitsa, S. Koponen // Вестник зоологии. — 2010. — Т. 44, № 4. — С. 291–299. — Бібліогр.: 27 назв. — англ. 0084-5604 http://dspace.nbuv.gov.ua/handle/123456789/65703 595.44(477.52/.54) en Вестник зоологии Інститут зоології ім. І.І. Шмальгаузена НАН України
institution Digital Library of Periodicals of National Academy of Sciences of Ukraine
collection DSpace DC
language English
topic Фауна и систематика
Фауна и систематика
spellingShingle Фауна и систематика
Фауна и систематика
Gnelitsa, V.A.
Koponen, S.
A New Species of the Genus Macrargus (Araneae, Linyphiidae, Micronetinae) from the North-East of Ukraine and Redescription of Two Related Species
Вестник зоологии
description Macrargus sumyensis Gnelitsa et Koponen, sp. n. is described from the North-East of Ukraine. Two closely related species of the genus Macrargus Dahl, 1886, Macrargus boreus Holm, 1968 and M. multesimus (O.-P. Cambridge, 1875), are redescribed and illustrated in detail.
format Article
author Gnelitsa, V.A.
Koponen, S.
author_facet Gnelitsa, V.A.
Koponen, S.
author_sort Gnelitsa, V.A.
title A New Species of the Genus Macrargus (Araneae, Linyphiidae, Micronetinae) from the North-East of Ukraine and Redescription of Two Related Species
title_short A New Species of the Genus Macrargus (Araneae, Linyphiidae, Micronetinae) from the North-East of Ukraine and Redescription of Two Related Species
title_full A New Species of the Genus Macrargus (Araneae, Linyphiidae, Micronetinae) from the North-East of Ukraine and Redescription of Two Related Species
title_fullStr A New Species of the Genus Macrargus (Araneae, Linyphiidae, Micronetinae) from the North-East of Ukraine and Redescription of Two Related Species
title_full_unstemmed A New Species of the Genus Macrargus (Araneae, Linyphiidae, Micronetinae) from the North-East of Ukraine and Redescription of Two Related Species
title_sort new species of the genus macrargus (araneae, linyphiidae, micronetinae) from the north-east of ukraine and redescription of two related species
publisher Інститут зоології ім. І.І. Шмальгаузена НАН України
publishDate 2010
topic_facet Фауна и систематика
url http://dspace.nbuv.gov.ua/handle/123456789/65703
citation_txt A New Species of the Genus Macrargus (Araneae, Linyphiidae, Micronetinae) from the North-East of Ukraine and Redescription of Two Related Species / V.A. Gnelitsa, S. Koponen // Вестник зоологии. — 2010. — Т. 44, № 4. — С. 291–299. — Бібліогр.: 27 назв. — англ.
series Вестник зоологии
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AT koponens anewspeciesofthegenusmacrargusaraneaelinyphiidaemicronetinaefromthenortheastofukraineandredescriptionoftworelatedspecies
AT gnelitsava newspeciesofthegenusmacrargusaraneaelinyphiidaemicronetinaefromthenortheastofukraineandredescriptionoftworelatedspecies
AT koponens newspeciesofthegenusmacrargusaraneaelinyphiidaemicronetinaefromthenortheastofukraineandredescriptionoftworelatedspecies
first_indexed 2025-07-05T16:05:40Z
last_indexed 2025-07-05T16:05:40Z
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fulltext UDC 595.44(477.52/.54) A NEW SPECIES OF THE GENUS MACRARGUS (ARANEAE, LINYPHIIDAE, MICRONETINAE) FROM THE NORTH–EAST OF UKRAINE AND REDESCRIPTION OF TWO RELATED SPECIES V. A. Gnelitsa1, S. Koponen2 1 Sumy State Makarenko Teacher’s Training University, Romenskaya str. 87 Sumy, 40000 Ukraine E-mail: gnelitsa@mail.ru 2 Zoological Museum, University of Turku, Turku, FI–20014 Finland Received 27 January 2010 Accepted 8 June 2010 A New Species of the Genus Macrargus (Araneae, Linyphiidae, Micronetinae) from the North-East of Ukraine and Redescription of Two Related Species. Gnelitsa V. A., Koponen S. — Macrargus sumyensis Gnelitsa et Koponen, sp. n. is described from the North-East of Ukraine. Two closely related species of the genus Macrargus Dahl, 1886, Macrargus boreus Holm, 1968 and M. multesimus (O.-P. Cambridge, 1875), are redescribed and illustrated in detail. K e y wo r d s: Araneae, Linyphiidae, Micronetinae, Macrargus, Ukraine. Íîâûé âèä ðîäà Macrargus (Araneae, Linyphiidae, Micronetinae) ñ ñåâåðî-âîñòîêà Óêðàèíû è ïåðåîïèñàíèå äâóõ áëèçêèõ âèäîâ. Ãíåëèöà Â. À., Êîïîíåí Ñ. — Ñ ñåâåðî-âîñòîêà Óêðàèíû îïèñàí Macrargus sumyensis Gnelitsa and Koponen, sp. n. Ïåðåîïèñàíû è äåòàëüíî ïðîèëëþñòðèðîâàíû äâà áëèçêèõ âèäà ðîäà Macrargus Dahl, 1886: M. boreus Holm, 1968 è M. multesimus (O.-P. Cambridge, 1875). Êëþ÷åâûå ñ ëîâ à: Araneae, Linyphiidae, Micronetinae, Macrargus, Óêðàèíà. Introduction According to the world spider catalogue (Platnick, 2010), the genus Macrargus Dahl, 1886 includes six species. One of them, Macrargus multesimus (O.-P. Cambridge, 1875), is distributed in the Holarctic; two other species, M. rufus (Wider, 1834) and M. carpenteri (O.-P. Cambridge, 1894) occur throughout the Palaearctic Region, whereas M. boreus Holm, 1968 and M. excavatus (O.-P. Cambridge, 1882) are known from Europe, and M. alpinus Li et Zhu, 1993 was described from China. Two species, M. rufus and M. carpenteri, are confirmed from Ukraine with certainty. However, Macrargus boreus could be confirmed recorded in Ukraine with confidence only if males were collected. In the absence of males, females have been confused with M. multesimus (Esyunin, Golovatch, Penev, 1993; Esjunin, Penev, Golovatch, 1994; Penev, Esjunin, Golovatch, 1994). Females of these two species cannot be identified with certainty based on illustrations only (Palmgren, 1975; Hauge, 1969; Paquin et Dupe´rre´, 2003; Tao et al., 1995; Wunderlich, 1995). Some variability of the lamella characteristica, the main distinctive feature, in Macrargus boreus has been shown by Huhta et Viramo (1979) in Finland. Palmgren (1975) suggested that M. boreus and M. multesimus possibly could be regarded as geographical races. Our initial goal was to point out the diagnostic characters of M. boreus and M. multesimus. In the course of our study, it soon became clear that the spiders from Ukraine identified as “M. boreus” noticeably differed from M. boreus specimens as well as from M. multesimus. We found out that the Ukrainian Macrargus specimens represent an undescribed species, similar to both M. boreus and M. multesimus. This species is described below as Macrargus sumyensis sp. n., and comparative redescriptions and drawings of Macrargus boreus and M. multesimus are provided as well. Material and methods Specimens from Ukraine were collected using a hand-held suction sampler; drawings were made with a camera lucida. The holotype male is deposited in the collection of the Zoological Department of Sumy State Vestnik zoologii, 44(4): 291–299, 2010 Ôàóíà è ñèñòåìàòèêà Teacher’s Training University (SSTTU). All other specimens are deposited in the first author’s private collection (VGC) and Zoological Museum of the University of Turku, Finland (ZMUT). Abbreviations of the names of palp and epigyne structures follow Saaristo, Tanasevitch (1996) and Merrett (1963): E — embolus; Ep — embolus proper; LC — lamella characteristica; LW — lateral wall of epigyne; M — median membrane; Pc — paracymbium; Ph — pit hook; Ps — proscapus; R — radix; SA — suprategular apophysis; St — subtegulum; T — tegulum; TA — terminal apophysis. All measurements are in millimeters. Results and discussion Macrargus multesimus (O.-P. Cambridge, 1875) (fig. 1, a, b; 2, a, b; 3, a, b; 4, a-c) Erigone multesima O.-P. Cambridge, 1875: 402, pl. 46, fig. 9. Linyphia mordax Koch, 1879: 13, pl. 1, fig. 3. Erigone granulosa Koch, 1879: 43, pl. 2, fig. 1. Microneta discolor Emerton, 1882: 75, pl. 24, fig. 1. Tmeticus granulosus Simon, 1884: 420; Grese, 1909: 327, pl. 7, fig. 5. Centromerus granulosus Reimoser, 1919: 80. Microneta multesima Crosby, Bishop, 1928: 1049. M. multesimus (O.-P. Cambridge, 1875): Holm, 1945: 44. Ma t e r i a l. 4 {, 3 }, Finland, Utsjoki, Kevo, mountain birch forest, 05.06–05.09.1973 (Koponen) (ZMUT). Di s t r i bu t ion. Europe. Belarus; Finland; Norway (mainland); Russia (Central, East, North, Northwest); Sweden (Helsdingen, 2009); Asia: Northern Asia (Russia); Mongolia; NE China; North America: Canada; USA (Alaska; Atlantic coast) (Eskov, 1994). Data on M. multesimus in Ukraine are questionable and need to be corroborated (Esyunin, Golovatch, Penev, 1993; Esjunin, Penev, Golovatch, 1994; Penev, Esjunin, Golovatch, 1994). De s c r i p t i o n . Ma l e. Total length 3.08. Carapace 1.40 long, 1.02 wide, orange. Sternum 0.73 long, 0.76 wide, gray-orange some darker at the margin. Posterior medi- an eyes separated by their diameter. Promargins of chelicerae with 4 teeth, retromargins with 5 teeth, frontal surface with strong tooth bearing a spine on its tip (fig. 1, b). Legs: tibia spination 2 : 2 : 2 : 2; position of metatarsal trichobothrium: I — 0.49; II — 0.53; III — 0.48; IV — 0.50. Length of leg segments: Leg Femur Patella Tibia Metatarsus Tarsus I 1.13 0.36 1.09 1.00 0.69 II 1.09 0.35 0.97 0.90 0.60 III 0.92 0.32 0.77 0.76 0.50 IV 1.26 0.34 1.15 1.08 0.64 Abdomen uniformly dark grey. Palp as in figures 1, a; 2, a, b; 3, a. Fema l e. Total length 3.18. Carapace 1.27 long, 0.86 wide, orange. Sternum 0.7 long, 0.66 wide, gray-orange, somewhat darker at the margin. Posterior median eyes are approximately one eye diameter apart. Promargins of chelicerae with 4–5 teeth, retro- margins with 5–6 teeth. Legs: tibia spination as in male. Position of metatarsal trichoboth- rium: I — 0.55; II — 0.50; III — 0.45; IV — 0.50. Length of leg segments: Leg Femur Patella Tibia Metatarsus Tarsus I 1.09 0.36 1.05 0.95 0.63 II 1.06 0.35 0.91 0.85 0.57 III 0.91 0.32 0.72 0.76 0.49 IV 1.25 0.34 1.13 1.08 0.60 Abdomen uniformly dark grey. 292 V. A. Gnelitsa, S. Koponen Epigyne and vulva as in figures 3, b; 4, a-c. D i s cu s s ion . Male can be easily recognized by the configuration of the lamella char- acteristica, the lower branch of which is shaped as a rounded trapezoid from the lateral view (fig. 1, a). One can see from below (fig. 2, a) that lower branch is pointed and direct- ed beneath the proximal widened part of the lamella characteristica. The distal piece of the upper branch has a straight lower edge and the rounded upper edge. The pit hook (Ph) and the pointed trapezoid-shaped lamella of the suprategular apophysis (SA) are separated by a rounded indentation (fig. 2, b). 293A New Species of the Genus Macrargus (Araneae, Linyphiidae, Micronetinae)… Fig. 1. Male palp laterally and chelicera frontally: a, b — Macrargus multesimus; c, d — M. sumyensis sp. n.; e, f — M. boreus. Scale bars 0.1 mm. Ðèñ. 1. Ïàëüïà ñàìöà ñáîêó è õåëèöåðà ñïåðåäè: a, b — Macrargus multesimus; c, d — M. sumyensis sp. n.; e, f — M. boreus. Ìàñøòàáíûå ëèíåéêè 0,1 ìì. Female differs by a relatively large epigyne (fig. 3, b), the ratio of the proscapus length/width in the narrowest place is 1.88. Macrargus sumyensis Gnelitsa et Koponen, sp. n. (fig. 1, c, d; 2, c, d; 3, c, d; 4, d-f) Ma t e r i a l. Holotype {, Ukraine, Sumy Region, Lebedin, Pinus forest, with Quercus, Populus, Betula and Caragana, 29.08.2000 (Gnelitsa) (SSTTU). Paratypes: 3 { 4 } the same locality and data (Gnelitsa) (VGC). Additional material. Ukraine, Sumy Region: Konotop District, Zheldaki vil., 17 }, 22.05.2003; Krolevets District, Gruzskoye vil.: }, 17.09.1989; }, {, 10.09.1989; 2 {, }, 21.09.1989; 4 {, }, 10.09.1989; 2 }, 294 V. A. Gnelitsa, S. Koponen Fig. 2. Male palp ventrally and suprategular apophysis: a, b — Macrargus multesimus; c, d — M. sumyensis sp. n.; e, f — M. boreus. Scale bars 0.1 mm. Ðèñ. 2. Ïàëüïà ñàìöà ñíèçó è ñóïðàòåãóëÿðíàÿ àïîôèçà: a, b — Macrargus multesimus; c, d — M. sumyensis sp. n.; e, f — M. boreus. Ìàñøòàáíûå ëèíåéêè 0,1 ìì. 07.09.1989; 3 {, 2 }, 16.09.1989; {, 4 }, 06.09.1989; {, 5 }, 02.09.1989; 5 {, 6 }, 20.09.1989; Lebedin District, Lebedin: { 17.09.1992; }, 16.10.1991; }, 19.06.1992; }, 08.07.1999; }, 21.04.2000; 2 {, 3 }, 10.10.1998; 4 }, 23.10.1992; 3 {, 5 }, 14.09.2000; Putivl District, Kardashi vil., 4 }, 06.10.2000; Seredinobuda District, Staraya Guta vil.: {, 19.09.2000; }, 08.05.1990; }, 16.09.2000; }, 19.09.2000; }, 13.05.2001; }, 16.05.2001; }, 17.05.2001; {, }, 16.09.2000; 2 }, 13.05.2001; 2 }, 15.05.2001; 2 {, 5 }, 19.09.2000; Shostka District, Shostka, }, 12.06.1997; Gamaleyevka vil.: {, 18.09.1998; {, }, 17.09.1998; Yampol District, Prudishche vil.: {, 05.05.2000; }, 08.06.1997; }, 18.07.1999; }, 20.07.1999; }, 03.05.2000; }, 06.05.2000; 6 {, 3 }, 14.09.1999; {, 4 }, 16.09.1999; 5 }, 05.05.2000, (Gnelitsa), (VGC). Macrargus multesimus from Belarus: Gomel Region, Struki, 12 km NE from Buda- Koshelevo, 7–9.09.1989, interfluve Querceto-Carpinetum nudum; from Russia: Bryansk Region, Khinel, 25 km SW from Sevsk, 18–19.09.1990, Quercetum caricoso-aegopodio- sum on fluvial terrace; Belgorod Region, Les-na-Vorskle Reserve, 24–26.09.1990, upland Quercetum aegopodioso-caricosum pilosae; and from Ukraine: Sumy Region, Trostyanets, 21–23.09.1990, interfluve Quercetum aegopodiosum (Esyunin, Golovatch, Penev, 1993; Esjunin, Penev, Golovatch, 1994; Penev, Esjunin, Golovatch, 1994) appeared to be M. sumyensis sp. n. D i a gno s i s. The male of this species can be well distinguished by the lamella char- acteristica (LC). The upper branch of LC is elongated and its initially parallel edges are going to the point along the distant quarter of the branch. The pointed lower branch is directed nearly parallel to the upper one (fig. 1, c). The pit hook (Ph) and the round- ed-trapezoid lamella of the suprategular apophysis (SA) are separated by a rounded inden- tation (fig. 2, d). Chelicerae with noticeably long fangs (fig. 1, d), bear the numerous tiny tubercles with spines on its lateral side. The epigyne resembles those of M. multesimus though it is smaller and the ratio of the proscapus length/width in its narrowest place is 2. The other distinctive features are the configuration of the dorsal part of the epigyne (fig. 4, e) and some small details of vulva (fig. 4, f). De s c r i p t i o n. Male. Total length 2.8. Carapace 1.16 long, 0.87 wide, orange. Sternum 0.57 long, 0.64 wide, light-brown some darker at the margin. Posterior medi- an eyes separated by 3/5 their diameter. Promargins of chelicerae with 5 teeth, retromar- gins with 5 teeth, frontal surface with strong tooth bearing the spine on its tip (fig. 1, d). Legs: tibia spination 2 : 2 : 2 : 2; position of metatarsal trichobothrium: I — 0.48; II — 0.49; III — 0.48; IV — 0.52. Length of leg segments: Leg Femur Patella Tibia Metatarsus Tarsus I 1.06 0.31 1.02 0.94 0.66 II 0.99 0.31 0.91 0.83 0.57 III 0.87 0.28 0.69 0.74 0.46 IV 1.15 0.29 1.06 0.99 0.57 Abdomen uniformly dark grey. Palp as in figures 1, c; 2, c, d; 3, c. F ema l e. Total length 2.8. Carapace 1.33 long, 0.97 wide, yellow-orange. Sternum 0.67 long, 0.71 wide, gray-orange. Posterior median eyes are a diameter of one apart. Promargins of chelicerae with 5 teeth, retromargins with 5 teeth. Legs: tibia spination as in male. Position of metatarsal trichobothrium: I — 0.55; II — 0.51; III — 0.52; IV — 0.52. Length of leg segments: Leg Femur Patella Tibia Metatarsus Tarsus I 1.19 0.35 1.04 0.97 0.63 II 1.09 0.35 0.94 0.87 0.55 III 0.97 0.32 0.77 0.77 0.48 IV 1.32 0.34 1.16 1.08 0.59 Abdomen uniformly dark grey. Epigyne and vulva as in figures 3, d; 4, d-f. 295A New Species of the Genus Macrargus (Araneae, Linyphiidae, Micronetinae)… B io l o g y. The spiders inhabit the litter mostly in mixed forests: Pinus, Betula with Quercus, Sorbus, rare Acer, Corylus, Frangula, Vaccinium. Adult spiders occur from April to July and in September — October with distinct peaks of quantity in May and in September. Macrargus boreus Holm, 1968 (fig. 1, e, f; 2, e, f; 3, e, f; 4, g-i) M. boreus Holm, 1968: Huhta, Viramo, 1979: 175, fig. 2; Palmgren, 1975: 19, fig 4 (5, 6). Ma t e r i a l. 3 { 3 }, Finland, Naantali, Luonnonmaa, Tamminiemi, grove, 02.12.1972–24.03.1973 (R. Mannila) (ZMUT). 296 V. A. Gnelitsa, S. Koponen Fig. 3. Male palp mesially and epigyne ventrally: a, b — Macrargus multesimus; c, d — M. sumyensis sp. n.; e, f — M. boreus. Scale bars 0.1 mm. Ðèñ. 3. Ïàëüïà ñàìöà îò ñðåäèíû è ýïèãèíà ñíèçó: a, b — Macrargus multesimus; c, d — M. sumyensis sp. n.; e, f — M. boreus. Ìàñøòàáíûå ëèíåéêè 0,1 ìì. Dis t r i bu t i on. Europe: Estonia; Finland; Norway (mainland); Sweden (Helsdingen, 2009); the data from the Central Russia, Moscow Region (Michailov, 1983, 1997) need to be corroborated. Misidentifications. Macrargus boreus Holm, 1968 (Gnelitsa, 1997; 2000 a; b; c) = Macrargus sumyensis sp. n. Desc r ip t ion. Ma le. Total length 2.8. Carapace 1.22 long, 0.91 wide, brown-orange. Sternum 0.64 long, 0.62 wide, orange. Posterior median eyes separated by approximate- 297A New Species of the Genus Macrargus (Araneae, Linyphiidae, Micronetinae)… Fig. 4. Epigyne laterally, dorsally and vulva: a, b, c — Macrargus multesimus; d, e, f — M. sumyensis sp. n.; g, h, i — M. boreus. Scale bars 0.1 mm. Ðèñ. 4. Ýïèãèíà ñáîêó, ñâåðõó è âóëüâà: a, b, c — Macrargus multesimus; d, e, f — M. sumyensis sp. n.; g, h, i — M. boreus. Ìàñøòàáíûå ëèíåéêè 0,1 ìì ly of eye diameter. Promargins of chelicerae with 4 teeth, retromargins with 4 teeth, frontal surface with strong tooth bearing the spine on its tip (fig. 1, f). Legs: tibia spination 2 : 2 : 2 : 2; position of metatarsal trichobothrium: I — 0.51; II — 0.55; III — 0.49; IV — 0.54. Length of leg segments: Leg Femur Patella Tibia Metatarsus Tarsus I 1.06 0.31 1.06 0.95 0.69 II 0.99 0.31 0.90 0.85 0.60 III 0.84 0.29 0.69 0.73 0.48 IV 1.13 0.29 1.06 1.02 0.63 Abdomen uniformly dark grey. Palp as in figures 1, e; 2, e; f; 3, e. F ema l e. Total length 2.59. Carapace 1.30 long, 0.98 wide, orange. Sternum 0.71 long, 0.63 wide, orange, some darker at the margin. Posterior median eyes are a diam- eter of one apart. Promargins of chelicerae with 5 teeth, retromargins with 4 teeth. Legs: tibia spination as in male. Position of metatarsal trichobothrium: I — 0.60, II — 0.59, III — 0.54, IV — 0.60. Length of leg segments: Leg Femur Patella Tibia Metatarsus Tarsus I 1.12 0.35 1.04 0.92 0.64 II 1.06 0.35 0.94 0.84 0.56 III 0.94 0.32 0.77 0.74 0.46 IV 1.26 0.34 1.15 1.06 0.58 Abdomen uniformly dark grey. Epigyne and vulva as in figures 3, f; 4, g-i. D i s c u s s i o n. Males of M. boreus are easy to recognize by the lamella character- isti-ca (LC) with lower branch directed towards the upper branch of LC. The straight edges of the upper branch of LC form an acute angle (fig. 1, c). The wide proximal part of LC covers almost whole terminal apophysis except its short distal piece (fig. 2, e). One can see the differences in embolus details (i) as well (fig. 2, e). The pit hook (Ph) and the triangular lamella of the suprategular apophysis (SA) are separated by the square — indentation (fig. 2, f). The female is recognizable by a relatively narrow epigyne, the ratio of the prosca- pus length/width in the narrowest place is 2.66. Contrary to both M. multesimus and M. sumyensis sp. n. proscapus (Ps) is oval (fig. 4, h) and the line of the lateral wall of the epigyne (LW) is straight, not curved (fig. 4, g). The general appearance of the epig- yne dorsal view (fig. 4, h) and some details of vulva (fig. 4, i) are different as well. Some of the palp and epigyne features (embolus configuration; open position of ter- minal apophysis; distal part of the suprategular apophysis; ventral, dorsal and lateral appear- ance of epigyne) indicate that Macrargus multesimus and M. sumyensis sp. n. are more close together than M. multesimus with M. boreus. We thank two anonymous referees for their critical comments and corrections of the manuscript. Cambridge O.-P. On some new species of Erigone from North America // Proc. Zool. Soc. Lond. — 1875. — P. 393–405. Crosby C. R., Bishop S. C. Araneae. In A list of the insects of New York // Mem. Cornell Univ. Agr. Exp. Sta. — 1928. — 101. — P. 1034–1074. Emerton J. H. 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Preliminary data on the spiders of the Desnansko–Starogutskiy Nature park // Zapovidna Sprava v Ukraini. — 2000 a. — 6, N 1–2. — P. 76–77. — Russian : Ãíåëèöà Â. À. Ïðåäâàðèòåëüíûå äàííûå î ïàóêàõ Äåñíÿíñêî-Ñòàðîãóòñêîãî íàöèîíàëüíîãî ïàðêà // Çàïîâ³äíà ñïðàâà â Óêðà¿í³. Gnelitsa V. A. The Linyphiid spiders of the Ivot river bottom land (the Sumy Area) // Zapovidna Sprava v Ukraini. — 2000 b. — 6, N 1–2. — P. 77–80. — Russian : Ãíåëèöà Â. À. Ïàóêè ñåì. Linyphiidae ïîéìû ð. Èâîò (Ñóìñêàÿ îáëàñòü) // Çàïîâ³äíà ñïðàâà â Óêðà¿í³. Gnelitsa V. A. The spider fauna of the family Linyphiidae of the Forest–Steppe zone of Ukraine: 1. Subfamily Linyphiidae // Izvestiya Kharkovskogo Entomologicheskogo Obshchestva. — 2000 c. — 8, N 1. — P. 132–139. — Russian : Ãíåëèöà Â. À. Ôàóíà ïàóêîâ ñåìåéñòâà Linyphiidae ëåñîñòåïíîé çîíû Óêðàèíû. 1. Ïîäñåìåéñòâî Linyphiinae // Èçâeñòèÿ Õàðüêîâñêîãî ýíòîìîëîãè÷åñêîãî îáùåñòâà. Grese N. S. Die Spinnen der Halbinsel Jamal // Iejegod. Zool. Mouz. Akad. Naouk SSSR. 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