Arctosa labiata, Tso & Chen, 2004

Tso, I-Min & Chen, Jun, 2004, Descriptions Of Three New And Six New Record Wolf Spider Species From Taiwan (Arachnida: Araneae: Lycosidae), Raffles Bulletin of Zoology 52 (2), pp. 399-411 : 401-402

publication ID

https://doi.org/ 10.5281/zenodo.4618989

persistent identifier

https://treatment.plazi.org/id/2D258789-FF9F-FFA5-C92E-FC318500FE43

treatment provided by

Carolina

scientific name

Arctosa labiata
status

sp. nov.

Arctosa labiata View in CoL , new species

( Figs. 6-10 View Figs )

Material examined. – Holotype - female, Kenting National Park , Pingtong County, Taiwan, Jun.2000, coll. Yu-Lung Hsieh (NMNS- THU-Ar-01-0108).

Paratypes – 1 female, Hui-Sun Experimental Forest Station , Nantou County, Taiwan, Aug.1998, coll. Hai-Yin Wu ( ZRC) ; 1 female, Lugu Country , Nantou County, Taiwan, 29 Jan.1996, coll. Wen-Hao Chou (NMNS-THU-Ar-02-0155, in IZCAS, Beijing) ; 1 male, Hui-Sun Experimental Forest Station , Nantou County, Taiwan, Apr.1998, coll. Hai-Yin Wu ( ZRC) ; 1 male, Hui-Sun Experimental Forest Station , Nantou County, Taiwan, Apr.1998, coll. Hai-Yin Wu (NMNS-THU-Ar-00-0065) ; 7 males, Kenting National Park , Pingtong County, Taiwan, Apr.2000, coll. Yu-Lung Hsieh (NMNS- THU-Ar-01-0107, 5 in NMNS, Taiwan; 2 in IZCAS, Beijing) .

Diagnosis. – Total length 3.92-5.33; carapace with indistinct pattern; epigynum lip-shaped, posterior margin almost straight, copulatory tube long and strongly twisted; median apophysis of pedipalp organ directed laterally, anterior margin concave, distal part pointed, curved ventrally, embolus long and narrowed distally, terminal apophysis bifurcate distally, upper branch wide and obtuse.

Etymology. – The specific name refers to the lip-shaped epigynum of the new species.

Description. – Female: Total length: 5.03-5.33. Holotype: total length 5.33, carapace length 2.51, width 1.75; abdomen length 2.94, width 1.84. Body with brown pubescence. Head region sloped laterally. Carapace reddish-brown, with indistinct pattern. Quadrangle of the posterior eyes dark brown, scattered with whitish pubescence and brownish long setae, colour between PLEs reddish-brown. Anterior eye row slightly recurved, slightly longer than posterior median eye row, AME slightly smaller than ALE, AME-AME longer than AME-ALE. Clypeus about same length of the diameter of AME. Chelicerae with 3 promarginal and 4 retromarginal teeth. Sternum slightly swollen, colour of margin rather dark. Legs with distinct annulations. Legs measurements: I 5.39 (1.59, 0.86, 1.16, 1.04, 0.74); II 4.90 (1.53, 0.80, 0.98, 0.92, 0.67); III 4.85 (1.35, 0.74, 0.86, 1.10, 0.80); IV 7.17 (1.96, 0.92, 1.35, 1.96, 0.98). Dorsum of abdomen longitudinally with several pairs of pale spots behind the heart stripe. Median septum of epigynum lip-shaped, posterior margin almost straight ( Fig. 6 View Figs ), copulatory opening invisible, copulatory tube long and strongly twisted, spermatheca expanded, round ( Fig. 7 View Figs ).

Male: Total length 3.92-5.09. One paratype: total length 5.09, carapace length 2.64, width 1.84; abdomen length 2.57, width 1.53. Similar to female in general shape and colour. Body slightly dark. Anterior eye row almost straight, AME-AME slightly longer than AME-ALE. Sternum brown. Femura of legs brown, other segments yellowish-brown, with distinct annulations. Legs measurements: I 5.96 (1.72, 0.92, 1.29, 1.23, 0.80); II 5.09 (1.53, 0.86, 0.80, 1.16, 0.74); III 5.10 (1.41, 0.74, 0.86, 1.35, 0.74); IV 7.42 (2.02, 0.92, 1.41, 2.15, 0.92). Cymbium of pedipalp with two thick apical setae. Median apophysis directed laterally, anterior margin concave, distal part pointed, curved ventrally; embolus long and narrowing distally, distal part thin and long; terminal apophysis bifurcate distally, upper branch wide and obtuse.

Remarks. – This species is very similar to A. meitanensis Yin et al., 1993 . It differs from the latter by following: in A. labiata , posterior margin of median septum almost straight, copulatory opening invisible, copulatory tube long and strongly twisted, upper branch of terminal apophysis wide and obtuse; in A. meitanensis , posterior margin of median septum arched distinctly, copulatory opening visible, copulatory tube short and slightly curved, upper branch of terminal apophysis narrow, pointed, digitiform.

Distribution. – Taiwan.

ZRC

Zoological Reference Collection, National University of Singapore

IZCAS

Institute of Zoology, Chinese Academy of Sciences

NMNS

National Museum of Natural Science

Kingdom

Animalia

Phylum

Arthropoda

Class

Arachnida

Order

Araneae

Family

Lycosidae

Genus

Arctosa

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