Spinosuncus brevacutus, 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 : 127

Spinosuncus brevacutus sp. n. Figs 5, 12, 21, 28

Material examined.

Type material. Holotype ♂ (Fig. 5); CHINA, Guizhou: Weng’ang Town, Maolan Reserve, Libo, 25.25N, 107.90E, alt. 814 m, 25.VII.2015, leg. Chen Kai, genitalia slide no. SYSU0056, molecular voucher no. SYSU-LEP0009. Paratypes: Jiangxi: 1♂, Main Peak, Mt. Jinggangshan, 28.IV.2011, leg. Liu Ping and Mei Yan, genitalia slide no. CXH12192; 1♂, Main Peak, Mt. Jinggangshan, 30.VI.2011, leg. Yang Lijun, genitalia slide no. CXH12161; 1♂, Main Peak, Mt. Jinggangshan, 1.IX.2011, leg. Cheng Muchun, genitalia slide no. SYSU0064; 1♂, 1♀ (Abdomen lost), Reservoir of Mt. Jinggangshan, 19.IX.2010, leg. Tong Bo, Zhang Dandan and Zhao Shuang; 1♂, 1♀, Mt. Guanggushan, Wuzhifeng Town, Shangyou, 25.92N, 114.05E, alt. 846 m, 22.VI.2015, leg. Chen Kai, genitalia slides no. SYSU0015 (♂), 0062 (♀, molecular voucher no. SYSU-LEP0156); 1♂, Mt. Jiulianshan, Longnan, 24.54N, 114.46E, alt. 625 m, 28.IV.2012, leg. Li Jinwei, genitalia slide no. SYSU0049; Hunan: 1♀, Visitors’ center, Taoyuandong, 26.47N, 114.04E, alt. 870 m, 20.V.2014, leg. Chen Xiaohua, genitalia slide no. SYSU0063; Guizhou: 1♂, Maolan Reserve, 1.IX.2011, leg. Li Jinwei, genitalia slide no. CXH12162; 4♂, Maolan Reserve, 25.13N, 107.87E, alt. 797 m, 12.VII.2013, leg. Chen Xiaohua, genitalia slides no. SYSU0020, 0023, 0074, 0910; 1♂, 2♀, Weng’ang Town, Maolan Reserve, Libo, 25.25N, 107.90E, alt. 814 m, 25.VII.2015, leg. Chen Kai, genitalia slides no. SYSU0046 (♂), 0071 (♀, molecular voucher no. SYSU-LEP0010), 0978 (♀).

Diagnosis.

Spinosuncus brevacutus is similar to S. contractalis and S. rectacutus . Differences with S. rectacutus are given in the diagnosis of S. rectacutus . It can be distinguished from S. contractalis by the minute and weakly outwardly curved spines of the apical uncus, the concave margin between those spines, the moderately setose transtilla and the semicircular sacculus distally with sclerotized, sparsely toothed margin in the male genitalia, by the straight, weakly sclerotized notches of the sinus vaginalis (curved, strongly sclerotized in S. contractalis ) and the relatively broad ductus bursae in the female genitalia.

Description.

Head. As for the genus. Thorax. Yellow. Legs as described for the genus. Wingspan 19-24 mm. Wing pattern as in S. contractalis . Abdomen. Yellow dorsally, apical margin of segments tinged with white. Male genitalia (Figure 12). Uncus with the lateral margin strongly bulging near distal end, with base sharply widened; setae absent; distal two corners slightly extended, forming minute spines. Valva of medium width, length approximately 2.5 × its maximal width; transtilla with dorsal margin slightly sclerotized, set with few setae; costal sclerotized band rather wide, slightly expanded to 2/3 of dorsal margin; distal half of sacculus expanded, semicircular, with strongly sclerotized margin, sometimes set with few tiny teeth, distal third of margin twisted; sella long and slender, rod-like, distal end slightly inflated and upcurved, set with several narrow, fin-shaped setae forming editum, each seta with apex evenly divided into several filaments. Juxta heart-shaped, distal half divided. Phallus as in S. contractalis . Female genitalia (Figure 21). Posterior apophysis with small expansion at basal third; anterior apophysis with small expansion beyond basal half. Sinus vaginalis with two straight, weakly sclerotized notches anterolaterally; lamella postvaginalis weakly sclerotized medially, most strongly sclerotized dorsolaterally. Antrum membranous. Ductus bursae moderately broad, as long as length of corpus bursae; colliculum somewhat constricted medially. Corpus bursae drop-shaped; accessory bursa arising from posterior 1/3 of corpus bursae, with small, weakly spinulose second signum beside its base; rhombic signum with two opposing angles bearing weak, narrow carinae almost connected medially, the other two angles set with spines.

Etymology.

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

Distribution.

(Figure 28). China (Jiangxi, Hunan, Guizhou).