Regular Article
J F E S
Journal of Forest and Environmental Science
pISSN: 2288-9744, eISSN: 2288-9752
Journal of Forest and Environmental Science Vol. 30, No. 4, pp. 378-382, November, 2014 http://dx.doi.org/10.7747/JFES.2014.30.4.378
Description of One New and One Unrecorded Spiders (Arachnida: Araneae) from Korea
Seung Tae Kim1,*, Jung Sun Yoo2, Sue Yeon Lee1, Joon-Ho Lee3, Yong Gun Choi4 and Jae Won Lim5
1Research Institute for Agriculture and Life Sciences, Seoul National University, Seoul 151-921, Republic of Korea
2Department of Invertebrates, National Institute of Biological Resources, Incheon 404-170, Republic of Korea
3Entomology program, Department of Agricultural Biotechnology, Seoul National University, Seoul 151-921, Republic of Korea
4The Korean Institute of Biospeleology, Daejeon 306-821, Republic of Korea
5Department of Animal Resources, National Institute of Biological Resources, Incheon 404-170, Republic of Korea
Abstract
Clubiona sapporensis Hayashi, 1986 in Clubionidae is recorded for the first time in Korea and Nesticus acrituberculum sp. nov. in Nesticidae is described with illustrations of taxonomic characters.
Key Words: Clubiona sapporensis, Nesticus acrituberculum, Clubionidae, Nesticidae, Korea
Received: June 17, 2014. Revised: October 23, 2014. Accepted: October 24, 2014.
Corresponding author: Seung-Tae Kim
Research Institute for Agriculture and Life Sciences, Seoul National University, Seoul 151-921, Republic of Korea Tel: 82-2-880-4692, Fax: 82-2-873-2319, E-mail: [email protected]
Introduction
Clubiona sapporensis Hayashi, 1986 and Nesticus acritu- berculum sp. nov. belonging to Clubionidae and Nesticidae, repectively. Each species was captured by sweeping around coastal area in Gyeongsangbuk-do and Mt. Gariwang in Gangwon-do during the intensive survey of arthropod fau- na of natural ecosystem in Korea. Though C. sapporesis was reported from North Korea by Mikhailov (1992: 16, 1997:
189), there is no reliable description from Korea to date.
For this reason, Namkung et al. (2009) excluded this spe- cies from the Bibliographic check list of Korean spiders.
Nesticus acrituberculum sp. nov. is relatively large nesticid members and seems to be rare in Korea, because only one specimen was collected through intensive survey for a long time. Present work describes these two species with illus- trations of taxonomic characters.
Materials and Methods
The external morphology of C. sapporesis and Nesticus ac- rituberculum sp, nov. were examined and taxonomic charac- ters of each species were illustrated using a stereoscopic dis- secting microscope (Nikon 745T). Measurements were made with an ocular micrometer and are recorded in millimeters. Leg measurements are given as “leg number, total length (femur, patella, tibia, metatarsus, and tarsus).”
Pedipalp measurements are listed as “total length (femur, patella+tibia, tarsus).” The following abbreviations are used in the description: AME, anterior median eye; ALE, anterior lateral eye; PME, posterior median eye; PLE, posterior lateral eye; AER, anterior eye row; PER, posteri- or eye row; MOQ, median ocular quadrangle; d, dorsal surface, p prolateral surface, r retrolateral surface and v ventral surface in leg spiniformation. The specimens stud- ied are lodged in the National Institute of Biological Resources (NIBR) of the Ministry of Environment, Korea.
Fig. 1. Clubiona sapporensis Hayashi, 1986 (A. Female Body, habitus (specimen), B. Male body, habitus (specimen), C. Eye area, D. Sternum, E. Female epygi- num (ventral view), F. Male palpal organ, ventral view, G. Ditto, prolateral view).
Systematic accounts
Family Clubionidae Wagner, 1887 Genus Clubiona Latreille, 1804
Clubiona sapporensis Hayashi, 1986 북녘염낭거미 (Fig. 1A-G)
Clubiona sapporensis Hayashi, 1986: 35; Chikuni, 1989:
126; Mikhailov, 1990: 157, 1995a: 74, 1995b: 38; Ono and Hayashi, 2009: 540
Measurements (in mm)
Male/Female: Body length 6.74/8.87; Carapace length 2.95/4.75, width 2.31/3.21; Abdomen length 3.23/4.12,
width 1.88/3.01; Cheicera length 1.57/1.56, width 0.66/
0.71, Endite length 0.95/1.34, width 0.44/0.71, Labium length 0.53/0.88, width 0.37/0.71, Sternum length 1.50/
2.11, width 1.00/1.61, AER 0.87/1.48, PER 1.12/1.95;
Legs: I 7.89/9.78 (2.12/3.11, 3.34/4.00, 1.51/1.62, 0.92/
1.05), II 7.94/9.73 (2.12/3.05, 3.38/3.62, 1.57/1.95, 0.87/
1.11), III 6.64/8.41 (1.83/2.44, 2.41/3.00, 1.76/2.07, 0.64/
0.90), IV 9.54/13.31 (2.53/3.95, 3.34/4.70, 2.86/3.55, 0.81/1.11), Pedipalp 2.57/3.85 (0.83/1.44, 0.74/1.30, 1.00/1.11).
Description
Male: Carapace longer than wide, yellowish brown with
Description of Two Spiders from Korea
infuscated anterior part, long ovoid, head region smoothly fused to thoracic region in dorsal view and not elevated in lateral view. Cervical groove indistinct, two pairs of indis- tinct radical grooves visible, fovea dark yellowish brown and distinct, spiniform (Fig. 1B). Eight eyes, AER＜PER, AER slightly recurved and PER almost straight in dorsal view, ALE the largest, PME the shortest, ALE＞AM E＞PLE＞PME, MOQ wider than long, setae scattered between PER and the anterior part of fovea (Fig. 1C).
Chelicerae longer than wide, uniformly chestnut with sev- eral curved macrosetae on the base, a few long setae me- dially and anteriorly, armed with 6 promarginal teeth and 4 retromarginal teeth. Endite longer than wide, dark brown, tuft of conspicuous setae at the infuscated edge. Labium wider than long, curvature at middle part, rebordered.
Sternum longer than wide, yellowish brown, shield shape, triangle spots in front of each coxa (Fig. 1D). Legs long and slender, light brown except dark brown metatarsi and tarsi with dark distal infuscations, leg formula 4213, meta- tarsi I-II and tarsi I-II with dense club-shaped setae on venter, tarsi I-IV with strong claw tufts, claws without teeth, leg spiniformation: I (femur 1-1-1d, 0-0-1p, tibia 2-1-0v, metatarsus 2-0-0v), II (femur 0-1-1-1d, 0-0-1p, tibia 2-2-0v, metatarsus 2-0-0v), III (femur 1-1-1d, 0-1-1p, 0-0-1r, patella 0-1-0r, tibia 1-0-1p, 1-0-1r, 1-1-0v, meta- tarsus 0-1-0d, 1-2-2p, 1-0-2r, 1-0-1v), IV (femur 1-1-1d, 0-0-1p, 0-0-1r; patella 0-1-0r, tibia 1-1p, 1-1r, 2-1-1v, met- atarsus 0-0-1d, 1-2-2p, 1-0-1r, 1-1-1-2v), pedipalp (1-2d, 0-1p). Abdomen longer than wide, grayish yellow, elon- gated oval shape without cardiac mark, the widest at the longitudinal middle, two pairs of muscle impressions on the mid-dorsum, long setae on the anterior margin, venter yel- lowish brown, two pairs of spotted longitudinal lines. Three pairs of spinnerets, anterior spinnerets conifrom, posterior spinnerets cylinder shape. Palp with tibial retrolateral apoph- ysis with one small process, tibial retrolateral apophysis hook shaped in ventral view, embolus thick and broadly curved, hook shaped, conductor broad behind embolus (Fig. 1F), truncated thumb shaped in prolateral view (Fig. 1G).
Female: female similar to male in general, lighter body coloration, carapace round quadrangle, dark yellowish brown cervical groove distinct, legs longer than female and stout, leg formula 4−1=2−3 (Fig. 1A). Female epi- gynum with a pair of copulatory openings at near concaved
margins, copulatroy duct visible, epigynal plate subequal in length and width, slightly sclerotized, a pair of spermathe- cae round (Fig. 1E).
Specimen examined
1 male and 1 female, 08-VI-2008, Mangyang-ri, Ulgin- gun, Gyeongsangbuk-do, YG Choi leg.
Ecological remarks
This species inhabits in coastal area where Vitex rotundifolia (Lamiales: Lamiaceae) and Leymus mollis (Poales: Poaceae) naturally grow.
Distribution
South Korea (newly recorded), Russia, Japan.
Family Nesticidae Simon, 1894 Genus Nesticus Thorell, 1869
Nesticus acrituberculum sp. nov. 검은줄무늬굴아기 거미(신칭) (Fig. 2A-F)
Type
Holotype male, Mt. Gariwang, Pyeongchang-gun, Gangwon-do (37o29'16'' N, 128o32'37'' E), 06-VIII-2009, ST Kim and SY Lee leg.
Etymology
The specific name is a combination of ‘acri’ meaning sharp and ‘tuberculum’ meaning projection from Latin re- ferring to right paracymbial projection on the paracymbium of male palp (Fig. 2E; Pr).
Diagnosis
Nesticus acrituberculum sp. nov. can be easily dis- tinguished from the other Nesticus species by the dorsal pat- tern, shape of paracymbium, shape and arrangement of 3 paracymbial projections, and serrated paracymbial tip on the paracymbium of male holotype.
Measurements
Female: Body length 6.92, Carapace length 2.32/width 2.08, Abdomen length 4.60/width 2.73, Cephalic width 1.15, Cheicera length 0.98/width 0.34, Endite length 0.62/width 0.40, Labium length 0.25/width 0.42, Sternum
Fig. 2. Nesticus acrituberculum sp. nov. (A. Body, habitus (specimen), B. Eye area, C. Chelicera, D. Sternum, E. Male palpal organ, ventral view, F. Ditto, dorsal view).
length 1.30/width 1.32, AER 0.70, PER 0.80, Legs : I 18.88 (5.20, 6.68, 5.35, 1.65), II 14.27 (4.07, 4.71, 3.90, 1.59), III 8.80 (3.21, 1.70, 2.72, 1.17), IV 14.58 (4.67, 4.77, 3.67, 1.47), Pedipalp 1.38 (1.38, 0.73, 1.40).
Description
Male: Caparace longer than wide, pale yellowish brown, almost round and slightly convex, blackish long setae on the margin of head region and center line, infuscated from front edge to rear end and both margins. Cervical and radi-
Description of Two Spiders from Korea
al grooves yellowish brown and distinct, fovea deeplt pitted, dark blackish brown, spiniform (Fig. 2A). Eight eyes, AER＜PER, AER slightly recurved and PER almost straight, eye area infuscated, all eyes on the black eye tu- bercles, PME the largest, AME the smallest, MOQ wider than long (Fig. 2B). Chelicerae longer than wide, light yel- lowish brown, armed with 3 promarginal teeth and scat- tered very minute denticles on the retromargin, dark yel- lowish brown setae scattered (Fig. 2C). Endites longer than wide, yellowish red with darker margin, anterior inside margin dull white, scapulae at anterior inside margin, long and and dark yellowish brown setae scattered sparsely.
Labium wider than long, dark yellowish brown, front edge dull white, slightly buldged. Sternum longer than wide, light yellowish red, shield shape, mottled at both sides, long and dark yellowish brown setae scattered sparsely (Fig.
2D). Legs very long and slender, light yellowish red in gen- eral, wholly covered with long and dark yellowish brown hairs and spines, mottled blackish brown annulations on the front, middle, rear of femur and tibia, and middle and rear of metatarsus, leg formula 1-4-2-3. Pedipalps light yellow- ish brown, covered with blackish brown, long and short hairs. Abdomen longer than wide, dull grayish brown, long ovoid, wholly covered with long and dark yellowish brown hairs, a dark blackish brown stripes with 2 pairs of con- nected markings (front ovoid and rear kidney shaped) on anterior part, 6 pairs of dark blackish brown horizontal markings on posterior part (Fig. 2A), venter dull grayish brown, wholly covered with long and dark yellowish brown hairs, a pair of mottled blackish brown patches on the poste- rior part. Spinnerets yellowish brown, mottled yellowish brown patch at the front. Palp with large and thick para- cymbium, embolus small and digitiform, conductor close to terminal apophysis, median apophysis small, circled teg- ulrar apophysis well developed, paracymbium with 3 con- spicuous basal projections (Fig. 2; Pl, Pm, and Pr), and serrated process at the tip of paracymbium (Fig. 2E and F).
Ecological remarks
This species inhabits on the leaves of shrubs at mountain side and collected by sweeping.
Distribution
Korea (Mt. Gariwang, Pyeongchang-gun, Gangwon-do).
Acknowledgements
This research was supported by National Institute of Biological Resources (New and unrecorded species discov- ery project 2012) and the Brain Korea 21 project from Seoul National University.
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