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Sudesna yangi Wang, Peng & Zhang, 2025, sp. nov.

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Autori principali:	Wang, Lu-Yu, Peng, Xian-Jin, Zhang, Zhi-Sheng
Natura:	Recurso digital
Pubblicazione:	Zenodo 2025
Soggetti:	Biodiversity Taxonomy Animalia Arthropoda Arachnida Araneae Dictynidae Sudesna Sudesna yangi
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author	Wang, Lu-Yu Peng, Xian-Jin Zhang, Zhi-Sheng
author_facet	Wang, Lu-Yu Peng, Xian-Jin Zhang, Zhi-Sheng
contents	<p><i>Sudesna yangi</i> sp. nov.</p><p>Figs 13, 14, 15 (杨氏苏蛛)</p><p><b>Type material.</b></p><p><i>Holotype</i> &male; (SWUC -T-DI-19-01); <b>Yunnan Province</b>; Dali City, Mount Cangshan, Xieyangfeng; 25°35′39″N, 100°11′23″E; elev. 2573 m; 11 September 2011; Z. Z. Yang leg. <i>Paratypes</i>: 3 &male; 6 &female; (SWUC -T-DI-19-02 to 10); same data as holotype. • 1 &female; (SWUC -T-DI-19-11); Mount Cangshan, Dapoqing; 25°34′38″N, 100°07′51″E; elev. 2043 m; 30 August 2009; Z. Z. Yang leg. • 6 &male; 4 &female; (SWUC -T-DI-19-12 to 21); Mount Cangshan, Yujufeng; 25°42′21″N, 100°7′7″E; elev. 2600 m; 13 September 2009; Z. Z. Yang leg. • 1 &male; (SWUC -T-DI-19-22); Mount Cangshan, Xieyangfeng; 25°35′24″N, 100°11′47″E; elev. 2500 m; 22 November 2011; P. Feng leg. • 2 &female; (SWUC -T-DI-19-23 to 24); Mount Cangshan, Xieyangfeng; 5°35′40″N, 100°11′21″E; elev. 2500 m; 14 June 2011; Y. He leg. • 3 &female; (SWUC -T-DI-19-25 to 27); Eyuan County, Cibi Township, Biaoshan; 26°09′41″N, 99°54′21″E; elev. 2310 m; 17 August 2009; Z. X. Li and L. Y. Wang leg. • 1 &male; (SWUC -T-DI-19-28); Kunming City, Mount Xishan, Maomaoqing; 24°57′20″N, 102°37′54″E; elev. 2204 m; 13 October 2016; G. Q. Huang, X. B. Guo and Y. C. Wang leg. • 1 &female; (SWUC -T-DI-19-29); Baoshan City, Longyang District, Mangkuan Township, Mount Gaoligong; 25°18′27″N, 98°47′42″E; elev. 1496 m; 6 October 2015; T. Lu and Y. C. Zhou leg. • 2 &female; (SWUC -T-DI-19-30 to 31); Baoshan City, Longyang District, Mangkuan Township, Mount Gaoligong; 25°18′05″N, 98°47′24″E; elev. 1793 m; 8 October 2015; T. Lu and Y. C. Zhou leg.</p><p><b>Etymology.</b></p><p>This species is named after the collector of the holotype and some paratype material; a noun in genitive case.</p><p><b>Diagnosis.</b></p><p>The male of this new species is similar to <i>S. circularis</i> Zhang & Li, 2011 (Zhang and Li 2011: 30, figs 8 A – C, 9 A – F) in having a long embolus and lacking tibial ctenidia, but it can be distinguished by the pale opisthosoma (vs yellow-brown with black markings) (Fig. 14 A) and the embolus originating at the 9: 00 o’clock position (vs 8: 30) (Figs 13 A – C, 14 C – E). For the diagnosis of the female of <i>S. yangi</i>, see <i>S. cangshan</i> sp. nov. part.</p><p><b>Description.</b></p><p><b>Male holotype</b> (Fig. 14 A) total length 3.76. Prosoma 1.70 long, 1.42 wide; opisthosoma 2.13 long, 1.48 wide. Dorsum of prosoma brown, with high cephalic area. Eye sizes and interdistances: AME 0.07, ALE 0.11, PME 0.10, PLE, 0.11; AME – AME 0.14, AME – ALE 0.11, PME – PME 0.15, PME – PLE 0.16, ALE – PLE 0.02. MOA 0.29 long, anterior width 0.26, posterior width 0.32. Clypeus height 0.16. Chelicerae stout, brown, with 4 promarginal and 3 retromarginal teeth. Legs yellow-brown. Leg measurements: I 6.08 (1.86, 2.18, 1.28, 0.76); II 6.34 (1.72, 2.02, 1.90, 0.70); III 4.02 (1.27, 1.28, 0.93, 0.54); IV 4.48 (1.36, 1.54, 1.08, 0.50). Leg formula: 1243. Opisthosoma oval. Dorsum and venter pale. Spinnerets short and yellowish brown.</p><p><i>Palp</i> (Figs 13 A, B, 14 C – E). Tibia without ctenidia. Retrolateral tibial apophysis hook-shaped in retrolateral view. Embolus somewhat O-shaped and originating at about the 9: 00 o’clock position, terminating at about the 5: 00 o’clock position. Anterior arm of conductor (AA) tapering and distally reaching the 12: 30 o’clock position; posterior arm (PA) spiral, with a pointed, scaly tip.</p><p><b>Female paratype</b> (SWUC -T-DI-19-02, Fig. 14 B) total length 3.78. Prosoma 1.36 long, 1.13 wide; opisthosoma 2.67 long, 1.99 wide. Dorsum of prosoma yellowish brown, with high cephalic area. Eye sizes and interdistances: AME 0.05, ALE 0.10, PME 0.09, PLE, 0.09; AME – AME 0.13, AME – ALE 0.10, PME – PME 0.14, PME – PLE 0.15, ALE – PLE 0.05. MOA 0.25 long, anterior width 0.23, posterior width 0.31. Clypeus height 0.14. Legs yellow-brown. Leg measurements: I 5.14 (1.61, 1.75, 1.07, 0.71); II 4.66 (1.52, 1.52, 1.00, 0.62); III 3.81 (1.20, 1.24, 0.85, 0.52); IV 4.58 (1.41, 1.59, 1.06, 0.52). Leg formula: 1243. Opisthosoma oval. Dorsum and venter pale. Spinnerets short and yellowish brown.</p><p><i>Epigyne</i> (Figs 13 C, D, 14 F, G). Copulatory openings large, 9 - shaped, facing away from each other, separated by about 1.7 times their width. Copulatory ducts slightly sclerotized, long and abruptly bent. Spermatheca clavate, spermathecal heads round. Fertilization ducts semicircular, directed laterally.</p><p><b>Variation.</b></p><p>Male (<i>n</i> = 12) total length 3.76–4.15; female (<i>n</i> = 16) total length 3.78–4.57.</p><p><b>Distribution.</b></p><p>China (Yunnan) (Fig. 15).</p>
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publishDate	2025
publisher	Zenodo
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spellingShingle	Sudesna yangi Wang, Peng & Zhang, 2025, sp. nov. Wang, Lu-Yu Peng, Xian-Jin Zhang, Zhi-Sheng Biodiversity Taxonomy Animalia Arthropoda Arachnida Araneae Dictynidae Sudesna Sudesna yangi <p><i>Sudesna yangi</i> sp. nov.</p><p>Figs 13, 14, 15 (杨氏苏蛛)</p><p><b>Type material.</b></p><p><i>Holotype</i> &male; (SWUC -T-DI-19-01); <b>Yunnan Province</b>; Dali City, Mount Cangshan, Xieyangfeng; 25°35′39″N, 100°11′23″E; elev. 2573 m; 11 September 2011; Z. Z. Yang leg. <i>Paratypes</i>: 3 &male; 6 &female; (SWUC -T-DI-19-02 to 10); same data as holotype. • 1 &female; (SWUC -T-DI-19-11); Mount Cangshan, Dapoqing; 25°34′38″N, 100°07′51″E; elev. 2043 m; 30 August 2009; Z. Z. Yang leg. • 6 &male; 4 &female; (SWUC -T-DI-19-12 to 21); Mount Cangshan, Yujufeng; 25°42′21″N, 100°7′7″E; elev. 2600 m; 13 September 2009; Z. Z. Yang leg. • 1 &male; (SWUC -T-DI-19-22); Mount Cangshan, Xieyangfeng; 25°35′24″N, 100°11′47″E; elev. 2500 m; 22 November 2011; P. Feng leg. • 2 &female; (SWUC -T-DI-19-23 to 24); Mount Cangshan, Xieyangfeng; 5°35′40″N, 100°11′21″E; elev. 2500 m; 14 June 2011; Y. He leg. • 3 &female; (SWUC -T-DI-19-25 to 27); Eyuan County, Cibi Township, Biaoshan; 26°09′41″N, 99°54′21″E; elev. 2310 m; 17 August 2009; Z. X. Li and L. Y. Wang leg. • 1 &male; (SWUC -T-DI-19-28); Kunming City, Mount Xishan, Maomaoqing; 24°57′20″N, 102°37′54″E; elev. 2204 m; 13 October 2016; G. Q. Huang, X. B. Guo and Y. C. Wang leg. • 1 &female; (SWUC -T-DI-19-29); Baoshan City, Longyang District, Mangkuan Township, Mount Gaoligong; 25°18′27″N, 98°47′42″E; elev. 1496 m; 6 October 2015; T. Lu and Y. C. Zhou leg. • 2 &female; (SWUC -T-DI-19-30 to 31); Baoshan City, Longyang District, Mangkuan Township, Mount Gaoligong; 25°18′05″N, 98°47′24″E; elev. 1793 m; 8 October 2015; T. Lu and Y. C. Zhou leg.</p><p><b>Etymology.</b></p><p>This species is named after the collector of the holotype and some paratype material; a noun in genitive case.</p><p><b>Diagnosis.</b></p><p>The male of this new species is similar to <i>S. circularis</i> Zhang & Li, 2011 (Zhang and Li 2011: 30, figs 8 A – C, 9 A – F) in having a long embolus and lacking tibial ctenidia, but it can be distinguished by the pale opisthosoma (vs yellow-brown with black markings) (Fig. 14 A) and the embolus originating at the 9: 00 o’clock position (vs 8: 30) (Figs 13 A – C, 14 C – E). For the diagnosis of the female of <i>S. yangi</i>, see <i>S. cangshan</i> sp. nov. part.</p><p><b>Description.</b></p><p><b>Male holotype</b> (Fig. 14 A) total length 3.76. Prosoma 1.70 long, 1.42 wide; opisthosoma 2.13 long, 1.48 wide. Dorsum of prosoma brown, with high cephalic area. Eye sizes and interdistances: AME 0.07, ALE 0.11, PME 0.10, PLE, 0.11; AME – AME 0.14, AME – ALE 0.11, PME – PME 0.15, PME – PLE 0.16, ALE – PLE 0.02. MOA 0.29 long, anterior width 0.26, posterior width 0.32. Clypeus height 0.16. Chelicerae stout, brown, with 4 promarginal and 3 retromarginal teeth. Legs yellow-brown. Leg measurements: I 6.08 (1.86, 2.18, 1.28, 0.76); II 6.34 (1.72, 2.02, 1.90, 0.70); III 4.02 (1.27, 1.28, 0.93, 0.54); IV 4.48 (1.36, 1.54, 1.08, 0.50). Leg formula: 1243. Opisthosoma oval. Dorsum and venter pale. Spinnerets short and yellowish brown.</p><p><i>Palp</i> (Figs 13 A, B, 14 C – E). Tibia without ctenidia. Retrolateral tibial apophysis hook-shaped in retrolateral view. Embolus somewhat O-shaped and originating at about the 9: 00 o’clock position, terminating at about the 5: 00 o’clock position. Anterior arm of conductor (AA) tapering and distally reaching the 12: 30 o’clock position; posterior arm (PA) spiral, with a pointed, scaly tip.</p><p><b>Female paratype</b> (SWUC -T-DI-19-02, Fig. 14 B) total length 3.78. Prosoma 1.36 long, 1.13 wide; opisthosoma 2.67 long, 1.99 wide. Dorsum of prosoma yellowish brown, with high cephalic area. Eye sizes and interdistances: AME 0.05, ALE 0.10, PME 0.09, PLE, 0.09; AME – AME 0.13, AME – ALE 0.10, PME – PME 0.14, PME – PLE 0.15, ALE – PLE 0.05. MOA 0.25 long, anterior width 0.23, posterior width 0.31. Clypeus height 0.14. Legs yellow-brown. Leg measurements: I 5.14 (1.61, 1.75, 1.07, 0.71); II 4.66 (1.52, 1.52, 1.00, 0.62); III 3.81 (1.20, 1.24, 0.85, 0.52); IV 4.58 (1.41, 1.59, 1.06, 0.52). Leg formula: 1243. Opisthosoma oval. Dorsum and venter pale. Spinnerets short and yellowish brown.</p><p><i>Epigyne</i> (Figs 13 C, D, 14 F, G). Copulatory openings large, 9 - shaped, facing away from each other, separated by about 1.7 times their width. Copulatory ducts slightly sclerotized, long and abruptly bent. Spermatheca clavate, spermathecal heads round. Fertilization ducts semicircular, directed laterally.</p><p><b>Variation.</b></p><p>Male (<i>n</i> = 12) total length 3.76–4.15; female (<i>n</i> = 16) total length 3.78–4.57.</p><p><b>Distribution.</b></p><p>China (Yunnan) (Fig. 15).</p>
title	Sudesna yangi Wang, Peng & Zhang, 2025, sp. nov.
topic	Biodiversity Taxonomy Animalia Arthropoda Arachnida Araneae Dictynidae Sudesna Sudesna yangi
url	https://doi.org/10.5281/zenodo.15183793