Yaginumia sia A TRU
Creators: name: Mi, Xiaoqi
name: Wang, Cheng
name: Su, Ming
Publisher: name: Zenodo
Year: 2025
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Araneae
Araneidae
Yaginumia
Yaginumia sia

description: Yaginumia sia (Strand, 1906)
Figs 5, 6, 7
Aranea sia Strand, in Bösenberg and Strand 1906: 237, pl. 4, fig. 24 (♀); Song 1980: 94, fig. 40 a – d (♂ ♀) (type material in Senckenberg Museum, Frankfurt am Main (SMF), Germany, not examined).
Araneus sia Yaginuma, 1960: 115, fig. 50.1–3; Lee 1966: 40, fig. 10 m – o; Yaginuma 1971: 54, fig. 50.1–3 (♂ ♀); Yin 1978: 2, fig. 3 A – D (♂ ♀); Hu 1984: 97, fig. 92.1–2 (♂ ♀); Zhao 1993: 233, fig. 107 a – b (♂ ♀); Zhao 1995: 950, fig. 446 a – b (♂ ♀).
Yaginumia sia Archer, 1960: 14, figs 1–4 (♂ ♀); Namkung et al. 1972: 93, fig. 11 (♀); Guo 1985: 75, fig. 2–27.1 – 3 (♂ ♀); Yaginuma 1986: 109, fig. 57.6 (♂ ♀); Zhang 1987: 89, fig. 73.1–4 (♂ ♀); Ishinoda 1989: 21, figs 12, 13 (♂ ♀); Chikuni 1989: 75, fig. 39 (♂ ♀); Feng 1990: 101, fig. 76.1–3 (♂ ♀); Chen and Gao 1990: 73, fig. 92 a – c (♂ ♀); Chen and Zhang 1991: 91, fig. 82.1–3 (♂ ♀); Zhao 1993: 262, fig. 123 a, b (♂ ♀); Zhao 1995: 979, fig. 462 a, b (♂ ♀); Yin et al. 1997: 395, fig. 286 a – d (♂ ♀); Song et al. 1999: 309, figs 184 G – I, 185 L (♂ ♀); Namkung 2002: 303, fig. 19.64 a, b (♂ ♀); Kim and Kim 2002: 225, figs 69, 155, 288, 289 (♂ ♀); Kim and Cho 2002: 270, figs 685–690 (♀); Namkung 2003: 305, fig. 19.64 a, b (♂ ♀); Tanikawa 2007: 93, figs 299, 300, 760–763 (♂ ♀); Tanikawa 2009: 463, figs 331–334 (♂ ♀); Zhu and Zhang 2011: 248, fig. 179 A – D (♂ ♀); Yin et al. 2012: 762, fig. 381 a – e (♂ ♀); Kim and Lee 2012: 109, fig. 81 A – C, plate 24 (♂ ♀); Baba and Tanikawa 2015: 69, 4 fig. (♂ ♀).
Material examined.
China – Guizhou Province • 2 ♂♂ 4 ♀♀; Tongren City, Shiqian County, Pingshan Township, Fodingshan Village, Yaoshang; 27 ° 20.54 ' N, 108 ° 9.50 ' E; ca 640 m elev.; 11. VII. 2017; X. Q. Mi et al. leg.; TRU - Araneidae -344 –349 • 2 ♂♂ 24 ♀♀; Tongren City, Bijiang District, Chuangdong Township, around campus of Tongren University; 27 ° 46.66 ' N, 109 ° 13.00 ' E; ca 570 m elev.; 7–15. VII. 2017; L. F. Chen et al. leg.; TRU - Araneidae -350 –375 • 3 ♂♂ 10 ♀♀; Qiandongnan Miao and Dong Autonomous Prefecture, Shibing County, Baiduo Township, Baiduo Village, Heichong; 27 ° 9.37 ' N, 108 ° 7.40 ' E; ca 980 m elev., 20. VII. 2019; X. Q. Mi et al. leg.; TRU - Araneidae -376 –388 • 4 ♂♂ 2 ♀♀; Zunyi City, Huichuan District, Banqiao Township, Loushanguan Village; 27 ° 58.06 ' N, 106 ° 53.20 ' E; ca 920 m elev.; 17. VII. 2024; X. Q. Mi leg.; TRU - Araneidae -389 –394. – Hubei Province • 4 ♂♂ 12 ♀♀; Wuhan City, Hongshan District, Ma’anshan Forest Park; 30 ° 31.65 ' N, 114 ° 26.12 ' E; ca 30 m elev.; 3. VI. 2018; X. Q. Mi leg.; TRU - Araneidae -395 –410.
Diagnosis.
This species resembles Y. medog Mi & Wang, sp. nov. in appearance and genitalia structures, but it can be distinguished as follows: 1) median apophysis with a projection on middle part (Fig. 6 A, C – E) vs lacking (Fig. 2 A, C – E); 2) median apophysis curled about 45 ° in ventral view (Fig. 6 C) vs about 90 ° (Fig. 2 C); 3) copulatory openings almost rounded in ventral view (Fig. 5 A, B) vs arcuate (Fig. 1 A); and 4) diameter of spermathecae about 1 / 4 width of epigynal base (Fig. 5 D) vs about 2 / 5 width of epigynal base (Fig. 1 D).
Description.
Male (TRU - Araneidae -350, Figs 5 H – J, 6). Total length 6.30. Carapace 3.30 long, 2.50 wide. Abdomen 3.70 long, 2.60 wide. Clypeus 0.08 high. Eye sizes and interdistances: AME 0.18, ALE 0.10, PME 0.13, PLE 0.10, AME – AME 0.15, AME – ALE 0.28, PME – PME 0.05, PME – PLE 0.45, MOA length 0.48, anterior width 0.48, posterior width 0.30. Leg measurements: I 13.30 (3.70, 5.10, 3.20, 1.30), II 11.60 (3.20, 4.20, 3.00, 1.20), III 6.50 (2.10, 2.10, 1.50, 0.80), IV 9.10 (2.70, 3.30, 2.20, 0.90). Carapace dark brown in cephalic region and yellowish-brown in thoracic region. Cervical groove conspicuous. Chelicerae dark brown, with four promarginal and three retromarginal teeth. Endites and labium dark brown at base, with paler tip. Sternum yellowish-brown. Legs yellow with brown annuli. Abdomen ~ 1.42 × longer than wide, dorsal grayish-brown with paler edges. Venter abdomen grayish-yellow with pair of lateral white patches. Spinnerets grayish-yellow.
Pedipalp (Fig. 6): tibia ~ 1.96 × longer than wide in ventral view; paracybium enlarged at base, lobe-like distally; tegular projection triangular, with serrated edge; median apophysis wide at base, with projection at middle part, tapered and curled distally; embolus slightly curled, shorter than conductor; conductor membranous, longer than wide; terminal apophysis with weakly sclerotized distal portion, about equal length to tegular projection.
Female (TRU - Araneidae -351, Fig. 5 A, TRU - Araneidae -352, Fig. 5 B – G). Total length 7.00. Carapace 3.00 long, 2.80 wide. Abdomen 4.30 long, 3.30 wide. Clypeus 0.08 high. Eye sizes and interdistances: AME 0.18, ALE 0.10, PME 0.13, PLE 0.10, AME – AME 0.15, AME – ALE 0.25, PME – PME 0.05, PME – PLE 0.45, MOA length 0.45, anterior width 0.45, posterior width 0.30. Leg measurements: I 11.90 (3.40, 4.40, 3.00, 1.10), II 10.30 (3.00, 3.80, 2.50, 1.00), III 6.20 (2.00, 2.20, 1.30, 0.70), IV 8.90 (2.80, 3.20, 1.90, 1.00). Habitus similar to that of male.
Epigyne (Fig. 5 A – D): ~ 1.55 × wider than long in ventral view, with heart-shaped scape; copulatory openings rounded, situated on ventral surface; copulatory ducts twisted, a bit longer than spermathecal diameter; spermathecae rounded, touching.
Variation.
Total length: ♂♂ 5.60–8.20 (N = 15); ♀♀ 5.80–13.10 (N = 52). Scape torn off in most individuals.
Distribution.
China (Anhui, Fujian, Guangdong, Guangxi, Guizhou, Henan, Hubei, Hunan, Jiangsu, Shaanxi, Shandong, Sichuan, Taiwan, Xinjiang, Zhejiang), Korea, Japan.
description: Published as part of Mi, Xiaoqi, Wang, Cheng & Su, Ming, 2025, Revision of the orb-weaving spider genus Yaginumia Archer, 1960 (Araneae, Araneidae) from China, pp. 169-184 in ZooKeys 1223 on pages 169-184, DOI: 10.3897/zookeys.1223.139465