Arctosa vaginalis Yu & Song, 1988

Wang, Lu-Yu, Marusik, Yuri M. & Zhang, Zhi-Sheng, 2012, Notes on three poorly known Arctosa species from China (Araneae: Lycosidae), Zootaxa 3404, pp. 53-68 : 61-65

Arctosa vaginalis Yu & Song, 1988

Figures 8–11 , 13

Arctosa vaginalis Yu & Song, 1988 (female holotype from Xiaguan, Dali City, Yunnan Province of China, deposited in JLU, not examined): 239, figs 19–22 (Ƥ); Song et al. 1999: 320, figs 190E–F (Ƥ).

Materials examined. CHINA: 2 males and 7 females, Yunnan Province, Yuxi City, Eshan County, Lian River, 24°9.386ʹN, 102°21.817ʹE, alt. 1577 m, 17 May 2011, Z.X. Li & G.C. Zhou leg. ( SWUC); 1 male, Yunnan Province, Puer City, Meizi Reservoir, 22°45.249ʹN, 100°59.040ʹE, alt. 1339 m, 21 May 2011, Z.X. Li & G.C. Zhou leg. ( SWUC); 2 males and 1 female, Puer City, Simaogang, 22°29.169ʹN, 100°35.96ʹE, alt. 637m, 22 May 2011, Z.X. Li & G.C. Zhou leg. ( SWUC); 4 females, Yunnan Province, Jinghong City, Xiaomengyang Town, 22°5.736ʹN, 100°53.440ʹE, alt. 748 m, 23 May 2011, Z.X. Li & G.C. Zhou leg. ( SWUC); 1 male and 1 female, Yunnan Province, Jinghong City, Mengla County, Menglun Town, 21°55.872ʹN, 101°14.868ʹE, alt. 547 m, 25 May 2011, Z.X. Li & G.C. Zhou leg. ( SWUC -1Ƥ, ZMMU -13); 1 male, Yunnan Province, Jinghong City, Mengla County, Manhe Town, 21°30.562ʹN, 101°34.574ʹE, alt. 642 m, 27 May 2011, Z.X. Li & G.C. Zhou leg. ( SWUC); 3 males and 1 female, Mengla County, Mohan Reservoir, 21°11.228ʹN, 101°41.482ʹE, alt. 920 m, 28 May 2011, Z.X. Li & G.C. Zhou leg. ( SWUC); 1 male and 1 female, Yunnan Province, Ruili City, Jiegao Port, Qingshui River, 23°59.039ʹN, 97°52.958ʹE, alt. 762 m, 4 June 2011, Z.X. Li & G.C. Zhou leg. ( SWUC).

Diagnosis. This species is similar to A. recurva Yu & Song, 1988 ( Yu & Song 1988: 238, figs 14–18; Yin et al. 1997: 99, figs 46a–e), but can be distinguished by the broad embolus and conductor, the relatively small terminal apophysis, the complex median apophysis of male palp ( Figs 8 A–B, 9E–F, 10A–B, 11A–E), the long stem of septum and the large seminal receptacle of epigyne ( Figs 8 C–D, 9G–H). Males of this species differ from all other lycosids by having ‘stridulatory files’ anterio-laterally on the chelicerae ( Fig. 9 D).

Description. Male ( Figs 9 A, 9C–D). Total length 5.82. Carapace 3.19 long, 2.32 wide; Abdomen 2.49 long, 1.60 wide. Carapace yellowish brown, with light brown submarginal bands, eye region black. Fovea longitudinal. Cervical groove indistinct. Radial furrows distinct. Eye sizes and interdistances: AME 0.11, ALE 0.09, PME 0.26, PLE 0.22; AME–AME 0.10, AME–ALE 0.04, PME–PME 0.26, PME–PLE 0.23. Clypeus height 0.07. Chelicerae elongate, brown, with stridulatory files on retrolateral surface, two promarginal and three retromarginal teeth. Labium yellow brown, with dark base, longer than wide. Endites yellow brown, longer than wide. Sternum yellow and scutellate, with sparse brown hairs. Legs yellow brown, with black ring-like stripe. Leg measurements: I 7.55 (2.18, 2.67, 1.66, 1.04); II 6.70 (1.88, 2.27, 1.54, 1.01); III 6.20 (1.88, 1.81, 1.55, 0.96); IV 9.57 (2.51, 3.18, 2.67, 1.21). Leg formula: 4123. Abdomen oval. Dorsum brown, with lanceolate cardiac mark in anterior half, and with black marking. Venter yellowish brown, with small, yellowish brown, spinnerets.

Male palp ( Figs 8 A–B, 9E–F, 10A–B, 11A–F). Subtegulum located in basal part of bulbus. Embolus relatively wide and flat, with pointed tip and distinct embolar ridge (Er in Figs 11 A–B, D). Conductor wide and membranous. Median apophysis relatively small and narrow, with three arms (Aa, Pa and Ra). Retrolateral arm with anterior furrow (Tf). Terminal apophysis knife-like, thinner than embolus, with a deep furrow ( Fig. 11 D). Cymbium with two spines apically.

Female ( Figs 9 B–C) total length: 6.05. Carapace 3.32 long, 2.37 wide; Abdomen 2.84 long, 1.89 wide. Eye sizes and interdistances: AME 0.14, ALE 0.11, PME 0.28, PLE 0.24; AME–AME 0.13, AME–ALE 0.05, PME–PME 0.26, PME–PLE 0.35. Clypeus height 0.10. Leg measurements: I 7.87 (2.24, 2.67, 1.77, 1.19); II 7.19 (2.11, 2.33, 1.59, 1.16); III 6.71 (1.89, 2.08, 1.64, 1.10); IV 10.68 (2.89, 3.59, 2.89, 1.31). Leg formula: 4123. Chelicerae without stridulatory files.

Epigyne ( Figs 8 C–D, 9G–H). Septum nearly rounded, with a wide and long stem. Copulatory openings located beneath the margins of stem of septum. Copulatory ducts thick and long. Seminal receptacles large and club-like. Fertilization ducts crescent-shaped.

Distribution. China (Yunnan, Guizhou) ( Fig. 13 ).

Remark. Although the type of Arctosa vaginalis was not examined, it is clear from the description in Yu & Song (1988) that the specimen they described is the same as the female specimens we examined.

Figures

FIGURE 8. Arctosa vaginalis Yu & Song, 1988, A. Left male palp, ventral view; B. Same, retrolateral view; C. Epigyne, ventral view; D. Vulva, dorsal view.

FIGURE 9. Arctosa vaginalis Yu & Song, 1988, A. Male habitus, dorsal view; B. Female habitus, dorsal view; C. Male eyes and chelicerae, front view; D. Chelicera, arrow indicates stridulatory files on the anterior chelicerae; E. Left male palp, ventral view; F. Same, retrolateral view; G. Epigyne, ventral view; H. Vulva, dorsal view.

FIGURE 10. Arctosa vaginalis Yu & Song, 1988, left male palp, A. Bulbus, ventral view; B. Same, frontal view.

FIGURE 11. Arctosa vaginalis Yu & Song, 1988, male, left, A. Bulbus, ventral view; B. Same, frontal view; C, Embolus, ventral view; D. Same, retrolateral view; E. Same, ventral view; F. Median apophysis, ventral view.

FIGURE 13. Distribution records of three Arctosa species in China.