Arctosa depectinata (Bösenberg & Strand, 1906)

Figures 1–3, 13

Tarentula depectinata Bösenberg & Strand, 1906 (five female and one male syntypes from Saga of Japan, deposited in SMF, not examined): 314, Pl. 7, fig. 332 (Ƥ); Strand 1918: 97, figs 30–31(3).

Arctosa depectinata: Roewer, 1955: 225; Yaginuma 1986: 159, fig. 87.4 (Ƥ); Chikuni 1989: 112, fig. 14 (Ƥ); Tanaka 1991: 301, figs 17–20 (Ƥ); Chen & Song, 1999: 141, figs 14–15 (Ƥ); Song et al. 1999: 318, fig. 188F (Ƥ); Tanaka 2009: 232, figs 60–61 (Ƥ).

Arctosa binalis Yu & Song, 1988 (male holotype from Ji’an City, Jiangxi Province of China, deposited in IZCAS, not examined): 236, figs 11–13 (3); Song et al. 1999: 318, fig. 188L (3). New synonym

Material examined. CHINA: 1 male and 1 female, Yunnan Province, Jinping County, Fenshuiling National Natural Reserve, 22°54.558ʹN, 103°13.172ʹE, alt. 1478 m, 13 May 2011, Z.X. Li & G.C. Zhou leg. (SWUC); 3 males and 3 females, Yunnan Province, Hekou County, Huayudong National Forest Park, 22°40.154ʹN, 103°56.189ʹE, alt. 130 m, 14 May 2011, Z.X. Li & G.C. Zhou leg. (SWUC); 1 male, Hekou County, in an oak grove area, 22°31.368ʹN, 103°57.270ʹE, alt. 209 m, 8 May 2011, Z.X. Li & G.C. Zhou leg. (ZMMU).

Diagnosis. The male of this species is similar to A. serrulata Mao & Song, 1985 (Mao & Song 1985: 263, figs 1–4; Song et al. 1999: 319, figs 189P, 190B), but differs from the latter by the strongly bifid median apophysis of the male palp (Figs 1 A–B, 2D–E, 3A–B, 3D), the different shape of epigynal septum and the narrow distance between anterior parts of the seminal receptacles (Figs 1 C–D, 2F–G).

Description. Male (Figs 2 B–C). Total length 4.19. Carapace 2.11 long, 1.62 wide; Abdomen 1.95 long, 1.35 wide. Carapace yellowish brown, with light brown submarginal bands, eye region black. Fovea vertical. Cervical groove indistinct. Radial furrows distinct. Eye sizes and interdistances: AME 0.10, ALE 0.08, PME 0.19, PLE 0.16; AME–AME 0.07, AME–ALE 0.03, PME–PME 0.15, PME–PLE 0.26. Clypeus height 0.08. Chelicerae elongate, yellow brown, with three promarginal and three or four retromarginal teeth. Labium light yellow, with dark base, longer than wide. Endites light yellow, longer than wide. Sternum yellow and scutellate, with sparse brown hairs. Legs yellow brown, with black pigmentation. Leg measurements: I 5.99 (1.72, 2.02, 1.37, 0.88); II 5.18 (1.45, 1.69, 1.27, 0.77); III 4.90 (1.39, 1.47, 1.31, 0.73); IV 7.74 (2.24, 2.47, 2.06, 0.97). Leg formula: 4123. Abdomen oval, yellowish brown, with lanceolate cardiac mark in anterior half, and with black irregular markings in posterior half part. Venter of abdomen yellow, with small, yellow spinnerets.

Male palp (Figs 1 A–B, 2D–E, 3A–D). Subtegulum located in the bottom of tegulum. Median apophysis with two arms: retrolateral arm (Ra in Figs 1 A, 3A) and posterior arm (Pa in Figs 1 A, 3A). Central part of median apophysis with small spine. Retrolateral arm with anterior furrow (Tf in Fig. 3 B). Embolus thin in ventral view (Figs 1 A, 3A), and wide in anterior view (Figs 3 B–C). Conductor wide and short, membranous and transparent (Figs 3 A–B). Terminal apophysis flat, with rounded tip, hides embolus in anterior view. The apex of cymbium with four stout spines (Figs 2 D–E).

Female (Figs 2 A, 2C) total length: 5.16. Carapace 2.66 long, 2.02 wide; Abdomen 2.59 long, 1.73 wide. Eye sizes and interdistances: AME 0.14, ALE 0.10, PME 0.23, PLE 0.16; AME–AME 0.05, AME–ALE 0.02, PME–PME 0.10, PME–PLE 0.21. Clypeus height 0.08. Leg measurements: I 5.91 (1.70, 2.07, 1.34, 0.80); II 5.46 (1.56, 1.90, 1.26, 0.74); III 5.41 (1.55, 1.76, 1.34, 0.76); IV 8.60 (2.45, 2.81, 2.30, 1.04). Leg formula: 4123.

Epigyne (Figs 1 C–D, 2F–G). Septum wide, axe-like, with a wide stem, lateral margins of stem indistinct. Copulatory openings located beneath the margins of stem of septum retrolaterally. Copulatory ducts thick and short. Seminal receptacles big and club-like, extending forward, with relatively narrow distance anteriorly. Fertilization ducts crescent-shaped.

Distribution. China (Fujian, Jiangxi, Shandong,Yunnan and Hong Kong) (Fig. 13) and Japan.

Remark. Although the types of Tarentula depectinata and Arctosa binalis were not examined, it is clear from the descriptions in Bösenberg & Strand (1906), Strand (1918), Yaginuma (1986), Chikuni (1989), Tanaka (1991, 2009), Chen & Song (1999), Song et al. (1999) and Yu & Song (1988) that the two species are synonymous.