Spinosuncus aureolalis (Lederer, 1863) Lederer, 1863

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 : 132-135

Spinosuncus aureolalis (Lederer, 1863) comb. n. Figs 8, 15-16, 24-25, 28

Botys aureolalis Lederer, 1863: 473.

Pyralis ochrealis Moore, 1877: 614.

Microstega aureolalis (Lederer): Bänziger, 1995: 270.

Material examined.

Type material. Lectotype of Pyralis ochrealis : 1♂; Sikkim, Moore Coll. 94-106, Pyralidae Brit. Slide No. 8678 (NHMUK), designated by Bänziger (1995).

Other material examined.

CHINA, Guangxi: 2♂, Nonggang, Longzhou, alt. 188 m, 26.VII.2011, leg. He Guiqing, genitalia slide no. SYSU0909; Yunnan: 1♀, Baihualing, Baoshan, alt. 1251 m, 13.VIII.2007, leg. Zhang Dandan, genitalia slide no. SYSU0075; 2♂, Baihualing, Baoshan, alt. 1520 m, 11,13.VIII.2007, leg. Zhang Dandan, genitalia slides no. SYSU0050, 0066; 1♂, 1♀, Mengla, alt. 800 m, 6,8.VII.2012, leg. Kitching and Ashton, genitalia slide no. FCEL0002 (♀) (FCEL); 2♂, 1♀, Bubang, Xishuangbanna, 21.60N, 101.59E, alt. 656 m, 23.VII.2014, leg. Guan Wei, Liu Shurong, Teng Kaijian and Wang xiuchun, genitalia slide no. ZDD12052 (♀, molecular voucher no. SYSU-LEP0146), ZDD12054 (♂) (NKU); 1♂, Nabang, Yingjiang County, 24.75N, 97.56E, alt. 239 m, 27.V.2016, leg. Duan Yongjiang, genitalia slide no. SYSU0958, molecular voucher no. SYSU-LEP0132; 1♂, Pianma Village, Lushui, Nujiang, alt. 1889 m, 16.VIII.2015, leg. Wei Xueli, genitalia slide no. SYSU0959; 1♂, Daxichang, Malipo County, alt. 1465 m, 7.VI.2015, leg. Tao Manfei, genitalia slide no. SYSU0173.

Diagnosis.

Spinosuncus aureolalis has a large wingspan (more than 26 mm). The ground colour of the wings is the darkest within the genus. Though S. aureolalis has a similar wingspan as S. praepandalis , it can be distinguished by the sinuate but not thickened anterior part of the postmedial line of the forewing near costa and the smooth, not dentate wing lines. In the male genitalia, it is characterized by the uncus distally with two large spines, the cheliform sacculus projections, and the fin- and needle-shaped setae forming editum on the sella distally (as in S. quadracutus ). In the female genitalia, the two large, hook-like notches anterolaterally on the sinus vaginalis and the laterally broad, granulated antrum (as in S. quadracutus ) are diagnostic. The appearance of S. aureolalis is most similar to that of S. quadracutus , both having the same wing pattern. The differences between these two species are given in the diagnosis of S. quadracutus .

Redescription.

Head. As for the genus. Thorax. Yellow. Legs as described for the genus. Wingspan 26-32 mm. Wings yellow, with fulvous tinge, lines fulvous to yellowish brown, venation somewhat darker than the ground colour, making wings impressively reticulated. Wing pattern as in S. contractalis , apart from: postmedial line of forewing more sinuate, of hindwing more curve. Abdomen. Fulvous dorsally, apical margin of segments tinged with white. Male genitalia (Figs 15, 16). Uncus gradually tapering from base to middle; laterally membranous and set with several se tae ventrally, other areas strongly sclerotized; distal 1/3 divided into two sharp teeth, thick, straight or slightly curved (weakly folded in Figs 15A, 16A), between two teeth usually two small and short spines (Figure 16A), sometimes invisible (Figure 15A) (longish, distinct in S. quadracutus , Figs 17A, 18A); with two caniniform teeth medioventrally. Valva narrow, length approximately 2.7 × its maximal width; transtilla extended ventrally into long and narrow projection, dorsal margin with sparse setae; costal sclerotized band rather narrow, extended to near distal end of valva; sacculus with median caniniform projection and distal cheliform projection, distal half set with dense setae ventrally, distal projection with dorsal margin strongly sclerotized, set with dense and flat-lying spines (except distal half, Figs 15C, 16C) and two moderately downcurved spines pointing towards juxta (sometimes the longer one absent, Figure 16C); sella short and broad, distally inflated, set with modified setae forming editum, varying from fin-shaped to thick needle-shaped, ventral margin upcurved, thickened and sclerotized, distally spinose, ended in long, curved spine. Juxta shield-shaped, pentagonal, distal margin sometimes slightly indented medially. Phallus with distal 1/4 slightly expanded, vesica distally with numerous spinules and several large spicules arranged into funnel-shaped bunch of cornuti (Figs 15D, 16D, rotated in Figure 16D). Female genitalia (Figs 24, 25). Anterior apophysis sclerotized, slightly sinuate at distal third; posterior apophysis oblong, slender, strongly sclerotized. Sinus vaginalis with two large, thick, hook-like notches anterolaterally; lamella postvaginalis sclerotized, band-shaped, extended dorsolaterally to about 1/4 width of sinus vaginalis. Antrum granulated and broad. Ductus bursae long and wide, about two times as long as diameter of corpus bursae; colliculum well-developed, with anterior end narrower. Corpus bursae globular; accessory bursa arising from posterior end of corpus bursae; rhombic signum with carinae weak and widely separated, other two angles bearing dense spines; second signum absent.

Distribution.

(Figure 28). China (Guangxi, Yunnan), India (Sikkim), Thailand (Chiang Mai).