Arctosa kiangsiensis ( Schenkel, 1963 )

Omelko, M. M. & Marusik, Y. M., 2022, First data on Arctosa wolf spiders (Araneae: Lycosidae) from Laos with description of a new species, Raffles Bulletin of Zoology 70, pp. 397-406 : 400-403

Arctosa kiangsiensis ( Schenkel, 1963)

( Figs. 4, 5 , 11, 12 , 18–21 , 27, 28 , 34–37 )

A. kiangsiensis: Yin et al., 1997: 88 , fig. 39a–b, male and female.

A. kiangsiensis: Song, Zhu & Chen, 1999: 319 , fig. 189C, J, male and female.

A. kiangsiensis: Yin et al., 2012: 797 , fig. 398a–f, male and female.

A. kiangsiensis: Dong, 2018: 58 , figs. 9–1. A–C, pl. 13, female.

For the complete list of taxonomic references see WSC (2022).

Material examined. 2 males ( ZMMU), LAOS, Vientiane Prov., env. of Nam-Lik Eco-Village , 18°36′53.18″N 102°24′31.87″E, coll. M.M. Omelko, 21 June–3 July 2017 ;

1 female, same place and collector, pitfall traps near lake shore in forest, 24–27 November 2013.

Redescription. Male ( Fig. 4 ). Total length 5.50. Carapace 2.74 long, 2.15 wide. Abdomen 2.58 long, 1.63 wide. Carapace dark brown, without submarginal bands, eye region black. Fovea black. Radial furrows thin, barely visible. Eye sizes and interdistances: AME 0.10, ALE 0.09, PME 0.20, PLE 0.17; AME–AME 0.08, AME–ALE 0.05, PME–PME 0.18, PME–PLE 0.16. Clypeus height 0.09. Number of cheliceral teeth as in Table 7. Labium brown, with yellow outer edge, longer than wide. Endites brown, longer than wide. Sternum brown, without visible pattern, with sparse brown hairs.

Femur I dark brown, retrolaterally with white rounded spot formed by short hairs; II dark brown with yellow base and spot as in I; III and IV dark brown with yellow base and yellowish spot at middle part. Patellae brown. Tibia I yellow with dark tip and base; II–IV brown with yellow rings. Metatarsi brown with yellow rings. Tarsi brown. Length of leg segments as in Table 4. Spination of legs I and II as in Table 8.

Abdomen oval, greyish, with longitudinal light brown median part. Ventral side of abdomen yellowish, with small, grey spinnerets. Lateral sides greyish with small yellow spots.

Palp ( Figs. 11, 12 , 18–21 , 27, 28 ). Tibia 1.97 times longer than wide (in ventral view), 1.25 times longer than bulb. Cymbium with 4 spines apically. Subtegulum (St) located on prolateral side of the bulbus. Tegular apophysis (Tg) with two arms, anterior (Aa) and retrolateral (Ra); retrolateral arm with long thin tip; anterior arm small, ridge-like ( Figs. 18, 19 ). Tegular apophysis (Tg) with large, serrated tooth (Tt) posteriorly ( Figs. 18–20 ). Embolus (Em) long, with small, pointed projection (Ep) near its tip ( Figs. 27, 28 ). Terminal apophysis (Ta) long, straight, with slightly widened tip. Conductor (Co) wide, semi-transparent, membranous, poorly visible.

Female ( Fig. 5 ). Total length 7.04. Carapace 3.55 long, 2.55 wide. Abdomen 3.15 long, 2.44 wide. Carapace dark brown (lighter than in males), without submarginal bands, eye region dark brown. Fovea black. Radial furrows poorly visible. Eye sizes and interdistances: AME 0.12, ALE 0.09, PME 0.24, PLE 0.17; AME–AME 0.10, AME–ALE 0.05, PME–PME 0.21, PME–PLE 0.28. Clypeus height 0.11. Number of cheliceral teeth as in Table 7. Labium brown, with yellow outer edge, longer than wide. Endites brown,

longer than wide with yellow outer edges. Sternum brown, without visible pattern.

Leg segments yellow brown, with white spots formed by short hairs (except for tarsi). Tibia I lighter than other segments, covered with white hairs dorsally. Length of leg segments as in Table 5. Spination of legs I and II as in Table 9.

Abdomen dorsally greyish. Venter of abdomen yellowish, with small, grey spinnerets. Lateral sides greyish with small yellow spots.

Epigyne ( Figs. 34–36 ). Septum (Se) broad and triangular, with narrow stem (Ss). Copulatory openings (Co) located close to septum stem (Ss). Copulatory ducts (Cd) thick, slightly curved. Seminal receptacles (Sr) large and dropletlike. Fertilisation ducts (Fd) thin. Receptacles (Sr) separated by ca. 2.25 diameters.

Notes. The male of A. kiangsiensis has the long, strongly curved tip of tegular apophysis. The females of A. kiangsiensis have receptacles reaching anterior edge of hoods and long septal stem. Arctosa kiangsiensis might be a senior synonym of A. tanakai Barrion & Litsinger, 1995 known from Philippines. However, we do no not synonymise these species here since published images of both species are very schematic and the status of A. tanakai requires studying of comparative material which lies beyond the scope of this paper.

Although A. kiangsiensis was treated in several publications before, it has never been properly illustrated (particularly the structure of its bulbus).

Distribution. China (Hunan, Zhejiang, Jiangxi, Fujian, Yunnan) and Laos ( Fig. 37 ).

Figures

Figs. 1–6. General appearance of Arctosa delaportei, new species (1), A. depectinata (2, 3), A. kiangsiensis (4, 5), and A. springiosa (6). 1, 2, 4, 6, male; 3, 5, female. Scale = 1 mm.

Figs. 7–14. Male palps of Arctosa delaportei, new species (7, 8), A. depectinata (9, 10), A. kiangsiensis (11, 12), and A. springiosa (13, 14). 7, 9, 11, 13, ventral; 8, 10, 12, 14, retrolateral. Scale = 0.2 mm. Abbreviations: Pa – posterior arm, Ra – retrolateral arm.

Figs. 15–25. Bulbs of Arctosa delaportei, new species (15–17), A. kiangsiensis (18–21), and A. springiosa (22–25). 15, 18, 22, ventral; 16, 21, 25, anterior; 17, 20, 24, retrolateral; 19, 23, prolateral-anterior. Scale = 0.1 mm. Abbreviations: Aa1–3 – anterior arms 1–3, Ag – arm groove, Co – conductor, Ra – retrolateral arm, Sd – sperm duct, St – subtegulum, Ta – terminal apophysis, Te – tegulum, Tg – tegular apophysis, Tt – tegular apophysis teeth.

Figs. 26–30. Embolic divisions of Arctosa delaportei, new species (26), A. kiangsiensis (27, 28), and A. springiosa (29, 30). 26, 28, 30, anterior; 27, 29, ventral. Scale = 0.1 mm. Abbreviations: Em – embolus, Ep – embolus projection, Ta – terminal apophysis.

Figs. 31–36. Epigynes of Arctosa depectinata (31–33) and A. kiangsiensis (34–36). 31, 34, ventral, intact; 32, 35, ventral, macerated; 33, 36, dorsal, macerated. Scale = 0.1 mm. Abbreviations: Cd – copulatory duct, Cp – copulatory opening, Fd – fertilisation duct, Ho – hood, Re – receptacle, Rg – receptacle gland, Se – septum, Ss – stem of septum.

Fig. 37. Distribution records of Arctosa spp.: A. delaportei, new species (1), A. depectinata (2), A. kiangsiensis (3), and A. springiosa (4). New localities in Laos are outlined by red circles.