Thagria fossa Nielson

(Figs. 97–108)

Thagria fossa Nielson 1977: 79 –80, Figs. 265 –270; Zhang 1990: 94, Fig. 90, after Nielson; Li & Wang 1991: 122; Li 1993: 30; Zhang 1994: 32 –33, Fig. 26, after Nielson; Nielson 2013: 87

Distribution. China (Guangxi, Zhejiang, Jiangxi, Hubei, Hunan, Sichuan, Guizhou, Fujian, Guangdong, Yunnan); Myanmar.

Material examined. 3♂, CHINA: Guizhou, Kuankuoshui, 1 Aug. 1984, coll. Li Zizhong; 1♂, CHINA: Sichuan, Emeishan, 15 Aug. 1995, coll. Yang Maofa; 1 ♂? CHINA: Hubei, Yichang, Wufenghouhe, 19 July 2002, coll. Hong Linjun; 2♂, CHINA: Guizhou, Leigongshan, 2 Aug. 2004, coll. Xu Pian; 3♂, CHINA: Zhejiang, Fengyangshan, 28–29 July 2009, coll. Meng Zehong & Chen Yong; 1♂, CHINA: Yunnan, Dali, 21 June 2011, coll. Li Yujian; 4♂, CHINA: Fujian, Daxianfeng, 14 May 2012, coll. Long Jiankun & Chang Zhimin; 2♂ 4♀, CHINA: Yunnan, Ailaoshan, 21–22 July 2012, coll. Chang Zhimin & Zheng Weibin; 1♂, CHINA: Guizhou, Wangmo, Dayi, 23 Aug. 2012, coll. Zheng Weibin; 3♂ 1♀, CHINA: Hunan, Badagongshan, 2–5 Aug. 2013, coll. Li Hu & Wu Yunfei (GUGC).

Variation. Based on the examined specimens, the apical hooked process and the middle spine of paraphysis may be mirror images, cf. Fig. 104 (Guizhou, Hunan, Fujian, Zhejiang, Yunnan and Guangdong) to Fig. 107 (Sichuan, Guizhou).

Remarks. This species was described from the holotype (male) and one female paratype from BISHOP (Bishop Museum, Honolulu, Hawaii), and three male, four female paratypes from NCSR (North Carolina State University, Raleigh), one female paratype from UKL (University of Kansas, Lawrence). It resembles T. soosi Nielson, 1977 in external morphology, but can be distinguished by the large excavation on apical half of paraphysis (Figs. 104, 107) and by the long ventral processes of segment X extending beyond the end of pygofer lobe (Fig. 101). It is also similar to T. digitata Li, 1989, but differs in paraphysis having no basal process (Figs. 104, 107) and ventral processes of segment X exceeding the apex of pygofer lobe (Fig. 101).