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Arthropoda Selecta 16 (1): 2932

ї ARTHROPODA SELECTA, 2007

Spiders of the genus Centromerus from Crimea (Aranei: Linyphiidae) О пауках рода Centromerus (Aranei, Linyphiidae) в Крыму V.A. Gnelitsa В.А. Гнелица
Sumy State Teachers Training University, Romenskaja Str. 87, Sumy 40002 Ukraine. Сумской государственный педуниверситет им. А.С. Макаренко, ул. Роменская 87, Сумы 40002 Украина.

KEY WORDS: Centromerusabditus sp.n., Linyphiidae, new species, description. КЛЮЧЕВЫЕ СЛОВА: Centromerusabditus sp.n., Linyphiidae, новый вид, описание. ABSTRACT. An illustrated description of a new spider species, Centromerus abditus sp.n., belonging to the sylvaticus-group, from the Crimea is presented. РЕЗЮМЕ. Приводится иллюстрированное описание нового вида пауков из Крыма Centromerus abditus sp.n., принадлежащего к группе видов sylvaticus.
cus paucidentatus Deltshev, 1983; C. obenbergeri Kratochvil & Miller, 1938; C. acutidentatus Deltshev, 2002) [Deltshev, 1983; Deltshev, Curcic, 2002] by the following features: cymbium without posteriodorsal protuberance; paracymbium lacking a row of teeth in contrast to four abovementioned species; terminal apophysis wide with skew cut apex and is almost triangular. Terminal apophysis in other four species is stretched and has almost parallel margins and rounded in front (C. sylvaticus (cf. Fig. 2), C. sylvaticus paucidentatus) or nearly pointed (C. obenbergeri, C. acutidentatus). embolic division bearing oblong outgrowth which is not short and rounded as in abovementioned species. anteroproximal part of the median membrane bears 7 stretched teeth similar in shape and size and arranged close to each other. The number of teeth in similar species either less (C. sylvaticus (Fig. 2), C. sylvaticus paucidentatus ) or much higher (C. acutidentatus, C. obenbergeri), and are placed appreciably wider apart. three large outgrowths (i, ii, iii) of the lamellar part of radix (Fig. 1a, b), not two as the similar species have. Epigyne of the new species greatly resembles those in abovementioned species and C. obscurus Bцsenberg, 1902. All these related species can be distinguished by the shape of the scapus (shape of its distal part (DPS) and especially shape of lateral lobes (LL) (Fig. 1d,e)) and details of the vulva. DESCRIPTION. MALE. Total length 2.09. Carapace 1.06 long, 0.86 wide, yellow-brown. Sternum 0.60 long 0.55 wide, yellow-gray, gradually darkening towards its margins. Posterior median eyes separated by 1.4X of their diameter. Promargins of chelicerae with 3 separated teeth , retromargins with 3 teeth close together. Legs brownish-yellow, FeI with 1 prolateral spine, tibial spination 1pro2dors : 2dors : 2dors : 2dors, Mt (III) with 1 dorsal spine. Position of metatarsal trichobothrium: I 0.37, II 0.37, III 0.40. Abdomen uniformly dark grey. Length of leg segments:
Leg I II III IV Femur 0.91 0.83 0.70 0.95 Patella 0.29 0.28 0.25 0.27 Tibia 0.87 0.74 0.59 0.92 Metatarsus 0.71 0.66 0.60 0.81 Tarsus 0.50 0.42 0.35 0.45

Introduction
Centromerus sylvaticus (Blackwall, 1841) is the single member of the genus known so far in Crimea [Kovblyuk, 2003]. As a result of investigations of the spider fauna carried out in Karadag Natural Reserve (Crimea), I have found specimens undoubtedly belonging to a second Crimean Centromerus species. Study of all available literature sources reveals that these specimens represent a new species. Abbreviations for the names of the separate structures of the palp and the epigyne were adopted from Merrett [1963] with some changes according Millidge [1977]. Also taken into account were the designations adopted in Saaristo & Tanasevitch [1996]: App anteroproximal part of the median membrane; DPS distal part of scapus; EP embolus proper; LL lateral lobe of epigyne; MM median membrane; R radix; SA suprategular apophysis; TA terminal apophysis. Other abbreviations are: Fe femur; Mt metatarsus. All measurements are in mm. Centromerus abditus sp.n. Fig. 1.
MATERIAL. Holotype: (Zoological Museum of Moscow State University (ZMMU)), Ukraine, the Crimea, Pheodosiya distr., Karadag Natural Reserve (Fig. 3), bottom of ravine, in dark cavities in dead grass near water, 11.04.2003, V.A. Gnelitsa. Paratypes: ; 6 (Zoology Department of the Sumy Teachers Training University), same data as holotype.

DIAGNOSIS. The male of the new species clearly differs from other Centromerus that have similar structure of the palp (C. sylvaticus (Blackwall, 1841) (Fig. 2); C. sylvati-


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Fig. 1. Centromerus abditus sp.n.: ac male palp, lateral, ventral and median views; d vulva; e epigyne ventral view. Scale 0.1 mm. Рис. 1. Centromerus abditus sp.n.: ac пальпа самца, вид сбоку, вентрально и медиально; d вульва; e эпигина, вид снизу. Масштаб 0,1 мм.

Palp as in Fig. 1 (ac). Cymbium dorsally without elevation, paracymbium lacking teeth, lamellar part of the radix with three large outgrowth. FEMALE. Total length 2.58. Carapace 0.98 long 0.69 wide, yellow-brown with darker margins. Sternum 0.56 long

0.50 wide, yellow-grey with slightly darker margins. Posterior median eyes are slightly more than diameter of one apart. Promargins of chelicerae with 3 teeth, retromargins with 4 tiny teeth. Legs yellow; tibial spination as in male. Position of metatarsal trichobothrium: I 0.41, II 0.38,


Spiders of the genus Centromerus from Crimea (Aranei: Linyphiidae)

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Fig. 2. Centromerus sylvaticus (Blackwall, 1841): ac male palp, lateral, ventral and median views; d epigyne; e vulva ventral view. Scale 0.1 mm. Рис. 2. Centromerus sylvaticus (Blackwall, 1841): ac пальпа самца, вид сбоку, вентрально и медиально; d эпигина; e вульва, вид снизу. Масштаб 0,1 мм.

III 0.33. Abdomen uniformly dark grey. Length of leg segments:
Leg I II II I IV Femur 0.81 0.74 0.67 0.91 Patella 0.28 0.28 0.27 0.27 Tibia 0.74 0.66 0.55 0.87 Metatarsus 0.63 0.57 0.52 0.74 Tarsus 0.46 0.41 0.35 0.43

Epigyne and vulva as in Fig. 1 d, e. Epigyne with widened scapus especially in its distal part. ETYMOLOGY: the specific name abditus means secretive.

Centromerus sylvaticus (Blackwall, 1841) Fig. 2.
C. sylvaticus is common in Crimea. About 70 specimens of this species were found in 23 localities chiefly in the


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(Sofia, Bulgaria) and Dr. N.M. Kovblyuk (Simferopol, Ukraine) for their kindly assistance in obtaining necessary literature.

References
Deltshev C. 1983. A contribution to the taxonomical study of sylvaticus group of genus Centromerus F. Dahl (Araneae, Linyphiidae) in Bulgaria // Acta Zool. Bulg. Vol.21. P.5358. Deltshev C., Curcic B.P.M. 2002. A contribution to the study of the genus Centromerus Dahl (Araneae: Linyphiidae) in caves of the Balkan Peninsula // Rev. suisse Zool. Vol.109. P.167 176. Kovblyuk N.M. 2003. [Catalogue of the Spiders (Arachnida: Aranei) of the Crimea] // Points of the development of the Crimea. Analitical, scientific and practical collected articles open to discussion. 15th issue: Problems of the ecology in the Crimea. Inventory animals and plants species in the Crimea. Simferopol: Tavria-Plus. P.211262 [in Russian]. Merrett P. 1963. The palpus of male spiders of the family Linyphiidae // Proc. zool. Soc. Lond. Vol.140. P.347467. Millidge A. F. 1977. The conformation of the male palpal organs of linyphiid spiders, and its application to the taxonomic and phylogenetic analysis of the family (Araneae: Linyphiidae) // Bull. Br. arachnol. Soc. Vol.4. P.160. Saaristo M.I., Tanasevitch A.V. 1996. Redelimitation of the subfamily Micronetinae Hull, 1920 and the genus Lepthyphantes Menge, 1866 with descriptions of some new genera (Aranei, Linyphiidae) // Ber. Nat.-med. Verein Innsbruck. Vol.83. P.163 186.

Fig. 3. The points of findings of Centromerus spiders in Crimea: round spots Centromerus sylvaticus (Blackwall, 1841); triangle Centromerus abditus sp.n. Fig. 3. Места находок пауков рода Centromerus в Крыму: круги Centromerus sylvaticus (Blackwall, 1841); треугольник Centromerus abditus sp.n.

foothill and mountain regions of the peninsula (Fig. 3). This species inhabits soil litter of Fagus, Quercus, Pinus and mixed forests. ACKNOWLEDGEMENTS. The author is grateful to Dr. Yu.M. Marusik (Magadan, Russia); Dr. C. Deltshev