Sanmenia gongshan, Yang, Zi-Zhong, Zhu, Ming-Sheng & Song, Da-Xiang, 2006

Yang, Zi-Zhong, Zhu, Ming-Sheng & Song, Da-Xiang, 2006, A new species of the genus Sanmenia Song & Kim, 1992 (Araneae, Thomisidae) from Yunnan Province, China, Zootaxa 1151, pp. 41-46 : 42-46

Sanmenia gongshan sp. nov.

Figs 1–10

Type material: Holotype male, CHINA: Yunnan Province, Gongshan County, Gaoligong Mountains Nature Reserve, 1500–1600m, Dandang Park, 27º43’N, 98º39’E, 3 May 2004, Z. Z. Yang leg. ( MHBU). Paratypes: two females and one male, same data as holotype ( MHBU); six females and three males, same data as holotype ( CDLC).

Additional material examined: Three males, CHINA: Yunnan Province, Yingjiang County, Gangmeng Town, 24º40’N, 97º59’E, 1050 m, 16 May 2004, Z. Z. Yang, leg. ( MHBU).

Diagnosis: The new species differs from S. kohi ( Ono 1995: 163, figs 8–15) and S. zhengi ( Song & Zhu 1997: 29, figs 13A–F) by the following combination of characters: RTA large, combined with VTA basally; spermathecae distinctly reniform; chelicerae of both sexes with three promarginal and four retromarginal teeth respectively.

Etymology: The specific name refers to the type locality and is a noun in apposition.

Description: Male (holotype) ( Fig. 2 ). Total length 3.67. Prosoma 1.68 long, 1.63 wide; opisthosoma 1.99 long, 1.78 wide. Carapace yellowish brown, pear­shaped, slightly longer than wide, and covered with some small setae. Cephalic region rather dark brown, thoracic region with some brown spots. Both eye rows recurved. Diameters of eyes: AME 0.05, ALE 0.13, PME 0.08, PLE 0.13. Distances between eyes: AME–AME 0.10, AME–ALE 0.08, PME–PME 0.13, PME–PLE 0.10, ALE–PLE 0.15. MOA 0.25 long, anterior width 0.15, posterior width 0.30. Bases of the lateral eye tubercle separated. Clypeus furnished with five long spiniform setae, height equal to the diameter of PLE, yellowish brown. Chelicerae brown, rather small and narrow, with scopulae on both margins of fang furrow; three promarginal teeth, of these the proximal one largest, and four retromarginal teeth with the distal one largest ( Fig. 4 ). Maxillae and labium yellowish brown. Sternum yellowish brown, posterior margin narrow and extending between coxae IV.

Opisthosoma oval, brown, furnished with numerous short setae; posterior half of dorsum with a pair of brown spot; margin with some short brown stripes; venter yellowish brown; spinnerets yellowish brown.

Patellae, tibiae and metatarsi of legs I–II reddish brown; tibiae and metatarsi of legs I– II with some thick spines. Other parts of legs yellowish brown. Spiniformation of legs: femora: I–IV dorsal 0­1­1, I prolateral 0­0­1­1­1, retrolateral 0­1­1­1­0; patellae: I–IV dorsal 1­1 (weak); tibiae: I–II dorsal 1­0­1 (weak), I–II pro­ and retrolateral 1­1­1, respectively, ventral 2­2­2­2­2 (strong), III–IV dorsal 1­0­1, pro­ and retrolateral 1­0­1, respectively, ventral 0­2 (apical); metatarsi I–II pro­ and retrolateral 1­0­1, respectively, ventral 2­2­2­2, III–IV pro­ and retrolateral 0­1­1, ventral 0­2­2. Leg formula: 1243. Measurements of legs:

Male palp as shown in Figs. 7–9 . Tibia with six trichobothria, RTA large, combined with VTA basally. Bulb simple, longer than wide, apophysis absent; embolus thin and long, originating medially on prolateral side of bulb; conductor large and lamellar.

Female (one paratype) ( Fig. 1 ). Total length 4.16. Prosoma 1.95 long, 1.90 wide; opisthosoma 3.20 long, 3.15 wide. Diameters of eyes: AME 0.05, ALE 0.13, PME 0.08, PLE 0.13. Distances between eyes: AME­ALE 0.08, AME­AME 0.10, PME­PLE 0.10, PME­PME 0.13, ALE­PLE 0.15. MOA 0.25 long, anterior width 0.15, posterior width 0.30. Eye tubercles of ALE and PLE separated.

Patella, tibia, metatarsus and tarsus of leg I dark brown. Spiniformation of legs: Femora: I–IV dorsal 0­1­1, I prolateral 0­1­1; patellae: I–IV dorsal 1­1 (weak); tibiae: I–IV dorsal 0­1­0­0­2 (apical), I–II pro­ and retrolateral 1­1­1, respectively, ventral 2­2­2­2­2 (strong), III–IV prolateral 1­1, ventral 1­1­1 (right); metatarsi I–II pro­ and retrolateral 1­ 0­1, respectively, ventral 2­2­2­2 (apical), III–IV pro­ and retrolateral 0­1­1, ventral 0­2­2. Leg formula: 1243.

Measurements of legs:

femur patella+ tibia metatarsus tarsus total

I 2.40 3.30 1.65 0.55 7.90

II 2.35 3.40 1.50 0.60 7.85

III 1.20 1.53 0.66 0.42 3.81

IV 1.38 1.68 0.81 0.45 4.32

Posterior half of dorsum with four brown spots, chelicerae ( Fig. 3 ) and other characters as in male. Epigyne ( Figs. 5–6 ) small, hood absent; copulatory openings clearly visible; spermathecae distinctly reniform.

Variation: Body length: males 3.42–3.87, females 3.31–4.53. Prosoma: males length 1.54–1.83, width 1.51–1.80; females length 1.68–2.05, width 1.64–2.03. Opisthosoma: males length 2.02–2.08, width 1.76–1.92; females length 2.86–3.16, width 2.96–3.16. Distribution: China: the Northwest area of Yunnan Province, shown as Fig. 10 .

Figures

FIGURE 10. Known distribution of the genus Sanmenia in China, Japan and Singapore.

FIGURES 1 – 6. Sanmenia gongshan sp. nov. 1 Female body, dorsal view; 2 Male body, dorsal view; 3 Left chelicerae, female, posterior view; 4 Left chelicerae, male, posterior view; 5 Epigyne, ventral view; 6 Same, dorsal view; Scale bars: 1 – 2, 0.5 mm; 3 – 6, 0.1 mm.

FIGURES 7 – 9. Left male palp (7 prolateral view; 8 ventral view; 9 retrolateral view). Scale bars: 0.1 mm.