Spinosuncus rectacutus, Chen, Kai, Zhang, Dandan & Li, Houhun, 2018

Chen, Kai, Zhang, Dandan & Li, Houhun, 2018, Systematics of the new genus Spinosuncus Chen, Zhang & Li with descriptions of four new species (Lepidoptera, Crambidae, Pyraustinae), ZooKeys 799, pp. 115-151 : 125-127

Spinosuncus rectacutus sp. n. Figs 4, 11, 20, 28

Material examined.

Type material. Holotype ♂ (Fig. 4); CHINA, Guizhou: Weng’ang Town, Maolan Reserve, Libo, 25.25N, 107.90E, alt. 814 m, 25.VII.2015, leg. Chen Kai, genitalia slide no. SYSU0060. Paratypes: Hubei: 1♂, Pingbaying, Xianfeng, alt. 1280 m, 21.VII.1999, leg. Li Houhun et al., genitalia slide no. ZDD12055 (NKU); 3♂, Mahe Town, Xianfeng, alt. 400 m, 24-26.VII.1999, leg. Li Houhun et al., genitalia slide no. ZDD12056 (NKU); 1♂, Maobaqu, Lichuan, alt. 700 m, 29.VII.1999, leg. Li Houhun et al., genitalia slide no. ZDD12057 (NKU); Guangxi: 1♂, Nanchao, Yachang Forest Farm, Leye, alt. 1160 m, 26.VII.2004, leg. Xu Jiasheng (NKU); 1♂, Huaping, Yachang Forest Farm, Leye, alt. 910 m, 28.VII.2004, leg. Xu Jiasheng, genitalia slide no. CYP12058 (NKU); 15♂, 2♀, Nonggang, Longzhou, 22.47N, 106.96E, alt. 271 m, 19.IV.2012, leg. Li Jinwei, genitalia slides no. SYSU0036 (♀), 0188 (♀), 0009, 0014, 0024, 0041, 0042, 0043, 0044, 0054, 0055; 8♂, 2♀, Nonggang, Longzhou, alt. 188 m, 25,27,28,31.VII.2011, leg. He Guiqing, genitalia slides no. SYSU0189 (♂), 0194 (♀), 0979 (♀); 1♂, Nonggang Reserve, 21.VIII.2011, leg. Yang Lijun, genitalia slide no. SYSU0053; 1♂, Nonggang Reserve, 21.VIII.2011, leg. Cheng Muchun, genitalia slide no. CXH12165; 1♂, Nonggang, Longzhou, 20.VIII.2011, leg. Cheng Muchun; 1♂, Nonggang, Longzhou, alt. 280 m, 29.VII.2012, leg. Yang Xiaofei (NKU); 1♂, Sanlian, Longzhou, alt. 180 m, 1.VIII.2011, leg. He Guiqing; 1♂, Tongling Valley, 23.02N, 106.65E, alt. 535 m, 22.VII.2013, leg. Chen Xiaohua, genitalia slide no. SYSU0259; 1♂, Longrui Reserve, 18.VIII.2011, leg. Li Jinwei, genitalia slide no. SYSU0021; 1♂, Longrui Reserve, 19.VIII.2011, leg. Zhang Dandan; 2♂, Bangliang, Jingxi, 1,5.VIII.2010, leg. Huang Jianhua, genitalia slide no. ZDD12047 (NKU); Guizhou: 2♂, Xian’nv’dong, Dashahe, Daozhen, alt. 600 m, 28-29.V.2004, leg. Hao Shulian, genitalia slide no. CYP12057 (NKU); 1♂, Baishao Village, Qinggangtang, Suiyang, alt. 800 m, 11.VIII.2010, leg. Du Xicui, genitalia slide no. CYP12063 (NKU); 1♂, Baishao, Kuankuoshui, alt. 800 m, 10.VIII.2010, leg. Du Xicui, genitalia slide no. SYSU0187; 1♂, Mt. Leigongshan, 26.35N, 108.15E, alt. 1198 m, leg. Chen Xiaohua, genitalia slide no. SYSU0057, molecular voucher no. SYSU-LEP0155; 1♂, Dongdai, Shuizu Town, Limingguan, Libo, alt. 720 m, 19.VII.2015, leg. Li Jia’en and Yang Meiqing, genitalia slide no. ZDD12050, molecular voucher no. SYSU-LEP0134 (NKU); 1♀, Weng’ang Town, Maolan Reserve, Libo, 25.25N, 107.90E, alt. 814 m, 25.VII.2015, leg. Chen Kai, genitalia slide no. SYSU0072; Chongqing: 2♂, 1♀, Xiaonanhai, Qianjiang, alt. 370 m, 21.VII.2012, Xu Lijun and Zhang Jun, genitalia slides no. SYSU0186 (♂), 0193 (♀).

Diagnosis.

Spinosuncus rectacutus resembles S. contractalis and S. brevacutus , for which details are provided in the diagnosis of S. contractalis . It can be best distinguished from S. brevacutus by the dorsally densely setose transtilla (moderately setose in S. brevacutus ), and the saddle-shaped sacculus with sclerotized margin densely set with a row of spinules. The distal spines of the uncus are straight and longer than those of S. brevacutus , and the lateral margin near the distal end of the uncus is less bulging. In the female genitalia, the length of the colliculum is approximately 1.5 × as long as its minimal width and the notches on the sinus vaginalis are strongly sclerotized whereas in S. brevacutus , the length of the colliculum is approximately as long as its minimal width and the notches on the sinus vaginalis are weakly sclerotized.

Description.

Head. As for the genus. Thorax. Yellow. Legs as described for the genus. Wingspan 18-22.5 mm. Wing pattern as in S. contractalis . Abdomen. Yellow dorsally, apical margin of segments tinged with white. Male genitalia (Figure 11). Uncus with lateral margin slightly bulging near distal end, with base sharply widened; setae absent; distal two corners with straight, pointed spines, outer margin between spines dentate. Valva of medium width, length approximately 2.3 × its maximal width; transtilla with dorsal margin strongly sclerotized and set with dense setae; costal sclerotized band wide, slightly expanded to 2/3 of dorsal margin; distal half of sacculus expanded to a saddle-shaped structure, with sclerotized margin, basal half of margin slightly twisted, set with dense spines; sella long and slender, rod-like, distal end slightly inflated, set with several narrow, fin-shaped setae forming editum, each seta with apex evenly divided into several filaments. Juxta heart-shaped. Phallus as in S. contractalis . Female genitalia (Figure 20). Posterior apophysis with small expansion at basal third; anterior apophysis with small expansion beyond basal half. Sinus vaginalis with two straight, sclerotized notches anterolaterally; lamella postvaginalis weakly sclerotized medially, most strongly sclerotized dorsolaterally. Antrum membranous. Ductus bursae slender, nearly as long as length of corpus bursae; colliculum narrow medially. Corpus bursae drop-shaped, slightly spinulose; accessory bursa arising from posterior 1/3 of corpus bursae, with small, densely spinulose second signum beside its base; rhombic signum with carinae almost connected.

Etymology.

The specific name is derived from the Latin recti- for straight and acutus, pointed, referring to the straight, pointed spines of the uncus.

Distribution.

(Figure 28). China (Hubei, Guangxi, Guizhou, Chongqing).