Draconarius exiguus, Liu, Jie & Li, Shuqiang, 2010

Liu, Jie & Li, Shuqiang, 2010, New Coelotine spiders from Xishuangbanna Rainforest, Southwestern China (Araneae: Amaurobiidae), Zootaxa 2442, pp. 1-24 : 12-16

Draconarius exiguus sp. nov.

Figs 11–15 and 21

Type material: Holotype male, 60 male and 51 female paratypes, CHINA: Yunnan Province, Xishuangbanna Dai Autonomous Prefecture, Mengla County, Menglun Natural Reserve, Secondary tropical seasonal moist forest (21º54.984’N, 101º16.982’E, Alt: 656m), from 3 October 2006 to 27 July 2007, Guo ZHENG leg.; 31 male and 13 female paratypes, Menglun Natural Reserve, Primary tropical seasonal rain forest (21º57.445’N, 101º12.997’E, Alt: 744m), from 3 October 2006 to 27 July 2007, Guo ZHENG leg.; 58 male and 22 female paratypes, Menglun Natural Reserve, Paramichelia baillonii plantation (about 20 years) (21º54.200’N, 101º16.923’E, Alt: 613m), from 3 October 2006 to 27 July 2007, Guo ZHENG leg.; 14 male and 8 female paratypes, Menglun Natural Reserve, Secondary tropical seasonal rain forest (21º55.428’N, 101º16.441’E, Alt: 598m), from 3 October 2006 to 27 July 2007, Guo ZHENG leg.; 50 male and 27 female paratypes, Menglun Natural Reserve, Rubber plantation (about 20 years) (21º54.498’N, 101º16.326’E, Alt: 586m), from 3 October 2006 to 27 July 2007, Guo ZHENG leg.; 39 male and 14 female paratypes, Menglun Natural Reserve, Rubber–Tea plantation (about 20 years) (21º54.463’N, 101º15.978’E, Alt: 569m), from 3 October 2006 to 27 July 2007, Guo ZHENG leg.

Etymology: The species epithet is derived from the Latin ‘ exiguus ’, meaning ‘small’ and refers to the extremely small atrium of female epigyne; adjective.

Diagnosis: The new species is similar to D. bannaensis sp. nov. in having the similar conductor ( Figs 7 A, 8B, 12A, 13B), the long embolus ( Figs 7 A, 8B, 12A, 13B), the similar cymbial furrow in male ( Figs 6 B, 11B, 9B, 14B), and in having a small atrium in female ( Figs 7 B, 10B, 12B, 15B), but can be distinguished from the latter by the presence of media apophysis ( Figs 6 B, 9B, 11B, 14B), the presence of lateral tibia apophysis ( Figs 6 B, 9B, 11B, 14B), the relatively maller atrium in comparison with the latter ( Figs 7 B, 10B, 12B, 15B), the presence of epigynal teeth ( Figs 7 B, 10B, 12B, 15B) and the large spermathecal heads ( Figs 7 C, 10C, 12C, 15C). These two new species can be distinguished from the other Draconarius species by the following characters: 1, conductor dorsal apophysis curved distally, with sharp distal end ( Figs 6 B, 9B, 11B, 14B); 2, cymbial furrow more than half of cymbial length, with distal margin distinctly dark ( Figs 6 B, 9B, 11B, 14B); 3, atrium significantly small ( Figs 7 B, 10B, 12B, 15B).

Description. Male (measurements of holotype first, paratypes in parentheses): Measurements: Total length 5.75(5.00–6.45). Prosoma length 3.00(2.75–3.25), width 2.20(2.10–2.40); Opisthosoma length 2.75(2.25–3.20), width 1.85(1.5–2.05). Eye measurements: AME 0.15; ALE 0.33; PME 0.25; PLE 0.35; AME–AME 0; AME–ALE 0.05; ALE–PLE 0; PME–PME 0.15; PME–PLE 0.08. Clypeus height 0.25(0.20– 0.26). Leg formula: IV, I, II, III; leg measurements: I: 9.25(7.80–9.75) [2.50(2.00–2.65), 3.00(2.50–3.20), 2.25(2.00–2.35), 1.50(1.30–1.55)]; II: 8.00(6.90–8.50) [2.25(1.90–2.45), 2.60(2.30–2.80), 1.90(1.65–1.95), 1.25(1.05–1.30)]; III: 7.05(6.05–7.50) [2.00(1.70–2.20), 2.00(1.65–2.15), 2.00(1.75–2.10), 1.05(0.95–1.05)]; IV: 9.95(8.75–10.25) [2.75(2.45–2.95), 3.25(2.70–3.35), 2.65(2.45–2.70), 1.30(1.15–1.25)]. Chelicerae with six promarginal and eight retromarginal teeth ( Fig. 11 C). Patellar apophysis small ( Figs 12 A, 13B); RTA with sharp distal end extending beyond tibia ( Figs 11 B, 14B); lateral tibial apophysis moderately large, and situated close to RTA ( Figs 11 B, 14B); cymbial furrow more than half of cymbial length, with distinctly dark distal margin ( Figs 11 B, 14B); conductor simple, conductor dorsal apophysis slightly curved distally, with sharp distal end ( Figs 11 B, 14B); median apophysis long and narrow, spoon–shaped ( Figs 11 B, 14B); embolic base almost rectangular; embolus filiform, slender, originating retrolaterally ( Figs 12 A, 13B).

Female (measurements of one of paratypes): Measurements: Total length 5.80–7.20. Prosoma length 2.55–3.05, width 1.95–2.25; Opisthosoma length 3.25–4.15, width 2.25–2.80. Eye measurements: AME 0.10; ALE 0.25; PME 0.25; PLE 0.30; AME–AME 0.08; AME–ALE 0; ALE–PLE 0; PME–PME 0.13–0.15; PME–PLE 0.10. Clypeus height 0.25–0.28. Leg formula: IV, I, II, III; leg measurements: I: 7.50–8.80 (2.00– 2.50, 2.55–3.00, 1.85–2.05, 1.10–1.25); II: 6.05–7.25 (1.80–2.25, 1.95–2.30, 1.40–1.65, 0.90–1.05); III: 6.10– 7.40 (1.75–2.20, 2.20–2.60, 1.40–1.65, 0.75–0.95); IV: 7.90–9.20 (2.20–2.75, 2.55–2.95, 2.15–2.35, 1.00– 1.35). Chelicerae with six promarginal and eight retromarginal teeth. Epigynal teeth small, membranous, situated posteriorly and laterally ( Figs 12 B, 15B); atrium small ( Figs 12 B, 15B); copulatory ducts not visible from the dorsal view ( Figs 12 C, 15C); spermathecal heads large, situated anteriorly, almost close together ( Figs 12 C, 15C); spermathecae simple, almost global, close together ( Figs 12 C, 15C).

Distribution: Only known from Menglun Natural Reserve of Xishuangbanna Dai Autonomous Prefecture in Yunnan Province in China ( Fig. 21 ).

Figures

FIGURE 6. Draconarius bannaensis sp. nov., holotype male. A. Left palp, prolateral view; B. Same, retrolateral view; C. Male cheliceral teeth, ventral view. CDA = conductor dorsal apophysis; CF = cymbial furrow; Em = embolus; EB = embolic base; LTA = lateral tibial apophysis; PA = patellar apophysis; RTA = retrolateral tibial apophysis; ST = subtegulum; T = tegulum. Scale bars = 0.2 mm.

FIGURE 7. Draconarius bannaensis sp. nov., holotype male (A) and female paratype (B – C). A. Left palp, ventral view; B. Epigynum, ventral view; C. Vulva, dorsal view. At = atrium; CD = copulatory duct; Co = conductor; EH = epigynal hood; ET = epigynal tooth; FD = fertilization duct; S = spermatheca; SH = spermathecal head; TS = tegulum sclerite. Scale bars = 0.2 mm.

FIGURE 11. Draconarius exiguus sp. nov., holotype male. A. Left palp, prolateral view; B. Same, retrolateral view; C. Male cheliceral teeth, ventral view. CDA = conductor dorsal apophysis; CF = cymbial furrow; Co = conductor; Em = embolus; EB = embolic base; LTA = lateral tibial apophysis; MA = median apophysis; PA = patellar apophysis; RTA = retrolateral tibial apophysis; ST = subtegulum; T = tegulum; TS = tegulum sclerite. Scale bars = 0.2 mm.

FIGURE 12. Draconarius exiguus sp. nov., holotype male (A) and female paratype (B – C). A. Left palp, ventral view; B. Epigynum, ventral view; C. Vulva, dorsal view. At = atrium; ET = epigynal tooth; FD = fertilization duct; S = spermatheca; SH = spermathecal head. Scale bars = 0.2 mm.

FIGURE 13 Draconarius exiguus sp. nov., photos based on holotype male. A. Male habitus, dorsal view; B. Left palp, retrolateral view. Scale bars: A = 1 mm, B = 0.2 mm.

FIGURE 14. Draconarius exiguus sp. nov., photos based on holotype male. A. Left palp, prolateral view; B. Same, retrolateral view. Scale bars = 0.2 mm.

FIGURE 15. Draconarius exiguus sp. nov., photos based on paratype female. A. Female habitus, dorsal view; B. Epigynum, ventral view; C. Vulva, dorsal view. Scale bars = 0.2 mm.

FIGURE 21. The location of Menglun Natural Reserve of Xishuangbanna Dai Autonomous.