Arctosa depectinata ( Bösenberg & Strand, 1906 )

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 : 398-400

Arctosa depectinata ( Bösenberg & Strand, 1906)

( Figs. 2, 3 , 9, 10 , 31–33 , 37 )

A. binalis: Yu & Song, 1988: 236 , figs. 11–13, male.

A. depectinata: Chikuni, 1989: 112 , fig. 14, male and female.

A. binalis: Song, Zhu & Chen, 1999: 318 , fig. 188L, male.

A. depectinata: Tanaka, 2009: 232 , figs. 60–61, male and female.

A. depectinata: Wang et al., 2012: 54 , figs. 1A–D, 2A–G, 3A–D, male and female.

A. depectinata: Wang et al., 2021: 24 , figs. 1C–D, 8A–H, 9A–D, male and female.

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

Material examined. 1 male ( ZMMU), LAOS, Vientiane Prov., env. of Nam-Lik Eco-Village , 18°36′53.18″N

102°24′31.87″E, coll. M.M. Omelko, November 2013; 2 males and 1 female ( ZMMU), same place and collector, pitfall traps at rice field, 17 May–3 June 2016; 3 males and 1 female ( FEFU), same place, coll. A.A. Komisarenko, June 2017 .

Redescription. Male ( Fig. 2 ). Total length 3.70. Carapace 1.92 long, 1.44 wide. Abdomen 1.59 long, 1.00 wide. Carapace dark brown, with yellow submarginal bands separated in several spots. Eye region black. Radial stripes distinct. Eye sizes and interdistances: AME 0.12, ALE 0.07, PME 0.19 PLE 0.15 AME–AME 0.05, AME–ALE 0.02, PME–PME 0.10, PME–PLE 0.14. Clypeus height 0.05. Number of cheliceral teeth as in Table 7. Labium light brown, longer than wide. Endites yellow, longer than wide. Sternum uniformly yellow, without pattern, covered with sparse brown setae.

Legs yellow brown, with greyish spots and semi-rings. Length of leg segments as in Table 2. Spination of legs I and II as in Table 8.

Abdomen dorsally greyish with irregular markings in posterior half part. Ventral side of abdomen yellow, with small greyish spots. Spinnerets yellow. Lateral sides yellow.

Palp as in Figs. 9–10 . Tibia 1.47 times longer than wide (in ventral view), slightly shorter than bulb. Cymbium 2.1 times longer than wide. Sperm duct near subtegulum almost straight. Tegular apophysis with 2 large arms: posterior (Pa) and retrolateral (Ra); posterior arm (Pa) with hooked tip. Embolus and terminal apophysis well depicted and described in Wang et al. (2012, 2021).

Female ( Fig. 3 ). Total length 5.57. Carapace 2.25 long, 1.67 wide. Abdomen 2.86 long, 1.66 wide. Number of cheliceral teeth as in Table 7. Colouration as in male. Eye sizes and interdistances: AME 0.13, ALE 0.10, PME 0.23, PLE 0.17; AME–AME 0.06, AME–ALE 0.02, PME–PME 0.08, PME–PLE 0.13. Clypeus height 0.05.

Length of leg segments as in Table 3. Spination of legs I and II as in Table 9.

Epigyne ( Figs. 31–33 ). Septum (Se) trapezoidal with wide stem (Ss). Lateral margins of stem indistinct. Receptacles (Sr) large, drop-like with small glands (Rg) anteriorly. Receptacles (Sr) spaced by ca. 3 diameters. Copulatory ducts (Co) thick, short.

Notes. The male of A. depectinata has a posterior arm (Pa) of tegular apophysis (vs. lacking in congeners occurring in the region). Females of A. depectinata have small receptacles, not reaching the anterior edge of epigyne.

This species was redescribed and well-illustrated in two recent papers ( Wang et al., 2012, 2021). Arctosa depectinata has the widest distribution among all species treated in this paper, with its range stretching 4,600 km from northernmost (Hokkaido, Japan) to southernmost ( Laos).

Distribution. China (Fujian, Guangdong, Hainan, Jiangxi, Shandong, Yunnan), Japan, 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. 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.