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Agelena tungchis (Araneae, Agelenidae), a new funnel-weaver from Taiwan PDF

2 Pages·1998·0.23 MB·English
by  LeeJ-D
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Bull.Br.arachnol.Soc.(1998)11(2),67–68 67 Agelena tungchis (Araneae, Agelenidae), a new Both specimens are deposited in the National Museum funnel-weaver from Taiwan ofNaturalScience(NMNS),Taiwan.Allmeasurements are in mm. Jeng-Di Lee DepartmentofGeography, Agelena tungchis sp. n. (Figs. 1–3) King’sCollegeLondon, Strand,LondonWC2R2LS Types: Female holotype (NMNS-OTTO-00192) and one female paratype (NMNS-OTTO-00193) from Lanhuachih, Nantou County, central Taiwan, 600m, Summary leg. J. D. Lee, 20 August 1995. AnewspeciesofAgelenawascollectedfromthecentral Etymology: Derived from the Chinese for an mountain area of Taiwan and is described as Agelena arthropod living in evergreen forest. tungchis. The spider weaves a funnel-web in the trees of Diagnosis: The female epigynum (Fig. 2) has a large, evergreenforest.ThisisthethirdspeciesofAgelenaknown fromTaiwan. elliptical atrium, wider than long, that differs from that of the related species, A. difficilis Fox, 1936, A. limbata, A. opulenta, and A. scopulata Wang, 1991 (Chen & Introduction Zheng, 1989; Wang, 1991; Wang, 1997; Yaginuma, Some earlier studies of the spider fauna of the moun- 1986).Theposterioredgeoftheepigynalplateisbroad. tains on Taiwan were made by Brignoli (1974) and The copulatory bursae are relatively broad with narrow Yoshida(1977).AlthoughChang(1996),Okuma(1994), marginal ridges and narrow diverticula (Fig. 3). Ono(1992,1993),andTanikawa(1995)addedsomenew A. tungchis, with body length of 17mm, is larger than discoveries, much more work is still needed in this the other species, c. 10–16mm. The wide dark area in habitat. Two Agelena species, A. limbata Thorell, 1897 the cephalic region of A. tungchis (Fig. 1) is also and A. opulenta L. Koch, 1878, have been recorded in distinctly different from that of A. difficilis and Taiwan (Li, 1964). The latter is common in lowland A. scopulata. areas,butnospecimensoftheformerwereavailablefor Female holotype: Total length 17.1. Cephalothorax examination in this study. The only specimen of A. length 6.5, width 4.8. Abdomen length 10.6, width 6.4. limbata in Taiwan recorded by Li (1964) has been lost, Length of legs I–IV: 19.2, 18.5, 18.1, 22.7. Coloration and the occurrence of the species in Taiwan has been (Fig.1):Cephalothoraxyellowbrownishwithwidedark doubted (Yaginuma, 1986). In this paper, the third brownish stripe from front of cephalic region to pos- species of Agelena from Taiwan is described, obtained terior margin of thorax. Sternum brownish. Abdomen from funnel-webs on the branches of an evergreen tree. dark brownish with seven yellow ‘‘`’’ stripes, the first Figs.1–3: Agelenatungchissp.n.,female.1Dorsalview;2Epigynum,ventralview;3Ditto,dorsalview.Scalelines=5mm(1),0.5mm(2,3). 68 AnewAgelenafromTaiwan and second with a central gap; ventrally light yellowish Science, Beijing, People’s Republic of China for with central dark brown area between epigastric furrow providing important references. and spinnerets. Legs brownish, apical ends of tibiae blackish. Female palpus brownish. Spinnerets dark brownish, except posterior spinnerets light brownish. References Cephalothorax: Longer than wide, cephalic region dis- BRIGNOLI, P. M. 1974: On some Oonopidae from Japan and tinctly elevated. Both eye rows recurved, especially pos- Formosa(Araneae).Actaarachn.Tokyo25:73–85. teriorrow;alleyesequalinsizeexceptposteriormedians CHANG, Y. H. 1996: A newly recorded spider from Taiwan, Para- smaller; median ocular rectangle slightly longer than plectana tsushimensis Yamaguchi, 1960 (Araneae: Araneidae). wide.Thoracicregionflat,withdistinctfovea,2pairsof Actaarachn.Tokyo45:13–14. cervical grooves. Chelicerae moderately strong, with CHEN,Z.F.&ZHENG,Z.H.1989:FaunaofZhejiang:Araneida. 1–365. Zhejiang Science and Technology Publ. House, yellowishboss.Sternumalmostcircular,pointedbehind, Hangzhou. with white pubescence and hairs. Labium longer than LI,C.L.1964:SpidersofTaiwan.Ta-chiangPubl.,Taiwan. wide,withdistinctscopulae.Abdomen:Oval,longerthan OKUMA,C.1994:SpidersofthegeneraEpisinusandMonetafrom wide, narrow in front; clothed with pubescence. Japan and Taiwan, with descriptions of two new species of Posterior spinnerets twice as long as anteriors. Episinus(Araneae:Theridiidae).Actaarachn.Tokyo43:5–25. Epigynum(Fig.2):Withlarge,ellipticalatrium,without ONO,H.1992:OccurrenceofthegenusXysticus(Araneae,Thomisi- median septum at anterior margin of atrium; posterior dae)inTaiwan.Bull.natn.Sci.Mus.Tokyo(A)18:35–40. ONO, H. 1993: Spiders of the genus Cyclosa (Araneae, Araneidae) edge of epigynal plate broad; in dorsal view (Fig. 3), fromTaiwan.Bull.natn.Sci.Mus.Tokyo(A)19:51–64. rather broad copulatory bursae with narrow marginal TANIKAWA,A.1995:TwonewspeciesofthespidergenusDiphya ridges and narrow diverticula, connected to pair of (Araneae:Tetragnathidae)fromJapanandTaiwan,withnotes spermathecae, to outside through atrium. ontheknownspecies.Actaarachn.Tokyo44:101–111. Male: Unknown. WANG,J.F.1991:SixnewspeciesofthegenusAgelenafromChina Distribution: Known only from central Taiwan. (Araneae:Agelenidae).Actazootaxon.sin.16:407–416. WANG,X.P.1997:OnthreeAgelenaspeciesfromChina(Araneae, Agelenidae).Bull.Br.arachnol.Soc.10:253–256. Acknowledgements YAGINUMA, T. 1986: Spiders of Japan in color (new ed.). 1–305. HoikushaPubl.Co.,Osaka. I would like to express my thanks to Dr Song YOSHIDA, H. 1977: The occurrence of Theridion spiniventre O.P. Da-Xiang, Institute of Zoology, Chinese Academy of CambridgeinJapanandFormosa.Atypus70:9–12.

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