Ecpyrrhorrhoe exigistria Zhang & Xiang, 2022

Xiang, Lanbin, Chen, Kai, Chen, Xiaohua, Duan, Yongjiang & Zhang, Dandan, 2022, A revision of the genus Ecpyrrhorrhoe Huebner, 1825 from China based on morphology and molecular data, with descriptions of five new species (Lepidoptera, Crambidae, Pyraustinae), ZooKeys 1090, pp. 1-44 : 1

Ecpyrrhorrhoe exigistria Zhang & Xiang sp. nov.

Figs 14 , 30 , 45

Diagnosis.

This species is similar to E. obliquata but can be best distinguished from it by the smaller size (forewing length: 7.0-9.0 mm), the pale brown reniform stigma and the indistinct and short streak of the forewing (Fig. 14 ), in the male genitalia (Fig. 30 ) by the excurved, finger-shaped and setose sella, the strongly sclerotized arms of the juxta, and anellus with a long spine and one or two short spines and in the female genitalia (Fig. 45 ) by the mostly tubular antrum.

Description

(Fig. 14 ). Head. Frons and vertex yellow, frons with lateral white bands. Labial palpus yellowish brown, contrastingly white at base ventrally. Maxillary palpus yellowish brown, white terminally. Thorax. Dorsally yellow, ventrally white; tegula yellow with brown base. Wings. Forewing length: 7.0-9.0 mm. Forewing pale yellow, posterior half of subterminal area brown; antemedial line dark brown, almost straight from 1/5 of costa to 2/5 posterior margin, slightly dentate; reniform stigma comma-shaped, brown; an oblique, dark brown streak from posterior end of reniform stigma, fuzzy, extended to tornus; postmedial line black brown, obliquely outwards from 3/5 of costa to 1/2 of M1, then dentated inwards to 2/3 of posterior margin; terminal line black brown; fringe with basal half brown, distal half dark brown. Hindwing pale yellow, subterminal area from dark brown to yellow, gradually paler to tornus; postmedial line black-brown, slightly dentate from 2/3 of M1 to 1/2 of CuA1, then bending inwards to base of CuA1, finally undulated to 2/3 of posterior margin; terminal line and fringe as in forewing. Abdomen. Pale yellow dorsally, black distally, white ventrally.

Male genitalia

(Fig. 30 ). Uncus with basal 2/5 nearly triangular and naked. Valva narrowly oval, costa straight or slightly concave and ventral margin curved, with apex rounded; sella excurved, thumb-shaped, thick, and setose, bearing thick setae on distal half; sacculus with distal 3/5 inflated into a broad and nearly triangular protrusion. Juxta with base wide, distal 3/4 bifid into slender, curved, sclerotized, and widely separated arms; anellus with a long spine and one or two short spines (attached to distal part of juxta in Fig. 30 ). Saccus rounded triangular. Phallus long and tapering, distal end spinulose and weakly sclerotized, with interlaced spicules cluster on vesica.

Female genitalia

(Fig. 45 ). Anterior apophysis ~ 1.5 × length of posterior apophysis. Antrum long tubular and sclerotized, with anterior 1/3 broad, weakly sclerotized and wrinkled medially; colliculum long; ductus seminalis connecting to anterior end of colliculum and with a weak sclerite located opposite to colliculum; ductus bursae ~ 2-2.5 × as long as diameter of corpus bursae, basal 1/3 bearing a slim sclerite. Corpus bursae globular; rhomboid signum with maximal length> 1/2 of diameter of corpus bursae; second (posterior) signum curved, oval, bearing sparse and long spines.

Material examined.

Type material. Holotype ♂, China: Yunnan: Wild Elephant Valley, Xishuangbanna , 22.17°N, 100.87°E, alt. 762 m, 12.VII.2015, Teng Kaijian, Bai Xia leg., genitalia slide No. ZDD12044 , molecular voucher No. LEP0063 (SYSBM) . Paratypes. China: Guangxi: 1♂, Lianhuashan, Mt. Dayaoshan , alt. 1250 m, 22.VII.2015, Liu Kaili, Zhao Jingxia leg., genitalia slide No. SYSU1009, molecular voucher No. LEP0211 ; 1♂, Mt. Shengtangshan, Jinxiu , 25.VIII.2011, Cheng Muchun leg., genitalia slide No. LJW12080 ; Hainan: 1♂, Jianfenling Natural Reserve , 18.75°N, 108.85°E, alt. 969 m, 12.V.2013, Li Jingwei leg., genitalia slide No. SYSU1247 ; 2♂, Diaoluoshan, Lingshui , 18.72°N, 109.87°E, alt. 942 m, 29-30.IV.2019, Xiang Lanbin leg., genitalia slide No. SYSU1514 ; Jiangxi: 1♀, Mt. Jiulianshan, Longnan , 24.58°N, 114.43°E, alt. 620 m, 26.IX.2016, Chen Kai, Duan Yongjiang leg., genitalia slide No. SYSU0276, molecular voucher no. LEP0100 ; 1♂, Xiagongtang, Mt. Jiulianshan, Ganzhou , 24.54°N, 114.46°E, alt. 600 m, 16.VIII.2020, Jin Mengjie leg., genitalia slide No. SYSU1513 ; Tibet: 1♂, Dexing Village, Medog , 29.32°N, 95.30°E, alt. 833 m, 18.VIII.2017, Qi Mujie, Yang Xiaofei leg. (NKU) ; Yunnan: 2♂, Wild Elephant Valley, Xishuangbanna , 22.17°N, 100.87°E, alt. 762 m, 18, 20.VII.2014, Teng Kaijian, Guan Wei, Wang Xiuchun, Liu Shurong leg. (NKU) .

Distribution.

China (Guangxi, Hainan, Jiangxi, Tibet, Yunnan).

Etymology.

The specific name is derived from the Latin exigu - (= short) and stria (= streak), referring to the short streak on forewings.

Figures

Figures 13 - 21. Adults of Ecpyrrhorrhoe spp. 13 E. rosisquama, sp. nov., holotype, male (Yunnan) 14 E. exigistria, sp. nov., holotype, male (Yunnan) 15 E. digitaliformis, male (Guizhou) 16 E. brevis, sp. nov., paratype, male (Guangdong) 17 E. puralis, male (Hainan) 18 E. rubellalis, male (Hainan) 19 E. longispinalis, sp. nov., holotype, male (Hunan) 20 E. celatalis, male (Yunnan) 21 E. biaculeiformis, female (Anhui). Scale bars: 5.0 mm.

Figures 28 - 33. Male genitalia of Ecpyrrhorrhoe spp., with enlarged detail of juxta (right) 28 E. rubiginalis, Shanxi (genitalia slide No. SYSU 0245) 29 E. rosisquama sp. nov., holotype, Yunnan (genitalia slide No. SYSU 0246) 30 E. exigistria sp. nov., holotype, Yunnan (genitalia slide No. ZDD 12044) 31 E. digitaliformis, Zhejiang (genitalia slide No. CXH 12193) 32 E. brevis sp. nov., holotype, Guangdong (genitalia slide No. CXH 12182) 33 E. puralis, Guangxi (genitalia slide No. SYSU 0254). Scale bars: 1.0 mm.

Figures 44 - 49. Female genitalia of Ecpyrrhorrhoe spp. 44 E. rosisquama sp. nov., paratype, Yunnan (genitalia slide No. SYSU 0262) 45 E. exigistria sp. nov., paratype, Jiangxi (genitalia slide No. SYSU 0276) 46 E. digitaliformis (genitalia slide No. SYSU 0274) 47 E. brevis sp. nov., paratype, Guangdong (genitalia slide No. SYSU 1533) 48 E. puralis, Jiangxi (genitalia slide No. SYSU 0216) 49 E. rubellalis, Hainan (genitalia slide No. SYSU 0243). Scale bars: 1.0 mm.