Edosa aurea Yang, Wang & Li

Yang, Linlin, Wang, Shuxia & Li, Houhun, 2014, A taxonomic revision of the genus Edosa Walker, 1886 from China (Lepidoptera, Tineidae, Perissomasticinae), Zootaxa 3777 (1), pp. 1-102 : 16-18

Edosa aurea Yang, Wang & Li , sp. nov.

( Figs 1 , 13 , 18 e, 24, 55, 81)

Type material. Holotype ♂, CHINA: Mt. Duowen (19°48΄N, 109°45΄E), Hainan Province, 120 m, 1.v.2009, leg. Qin Jin & Bingbing Hu, genitalia slide No. YLL11181.

Paratypes: CHINA: Hainan Province: 4 ♂, same data as for holotype but 1−2.v.2009, genitalia slide Nos.

NKYLL 001, YLL10074, YLL10075, YLL10076; 1 ♂, Datian Conservation Zone (19°42΄N, 109°47΄E), 25 m, 30.xi.2009, leg. Zhaohui Du & Linlin Yang, genitalia slide No. YLL10031; 1 ♀, Mt. Yingge (19°02΄N, 109°33΄E), 620 m, 3.vi.2010, leg. Bingbing Hu & Jing Zhang, genitalia slide No. YLL10236f. Guangxi Zhuang Autonomous Region: 2 ♀, Qingshan Yard (22°08΄N, 106°44΄E), Pingxiang, 300 m, 21,23. vii.2011, leg. Bingbing Hu et al., genitalia slide Nos. YLL11175, YLL11184; 1 ♀, Fubo Yard (22°02΄N, 106°50΄E), Pingxiang, 550 m, 1.viii.2011, leg. Bingbing Hu et al., genitalia slide No. YLL11174; 1 ♀, Shaoping Yard, Pingxiang (22°03'N, 106°55'E), 190 m, 25.vii.2011, leg. Bingbing Hu et al., genitalia slide No.YLL11178; 2 ♂, Pingxincun, Yizhou (24°30΄N, 108°40΄E), 150 m, 16.viii.2011, leg. Shulian Hao & Yinghui Sun, genitalia slide No. YLL11179; 1 ♂, Nonggang, Longzhou (22°28΄N, 106°57΄E), 20.viii.2011, leg. Jinwei Li, genitalia slide No. YLL12150.

Diagnosis. This new species is similar to E. witherspoonella Robinson, 2008 . The defining genital feature is the wrinkled flap of the valva excurved and ovate in this species, but recurved and ridge-like in E. witherspoonella . Apart from this difference, the first collicular ring has a pair of digitate processes in E. aurea sp. nov., which is a dagger-shaped process in E. witherspoonella .

Description. Adult ( Fig. 24 ). Wingspan 12.0−20.0 mm. Head orange yellow. Antenna yellowish white, 0.8× length of forewing; scape without pecten, flagellum unicolorous. Labial palpus dusty yellow, mixed with brown scales on outer surface. Thorax and tegula golden cream. Forewing index 0.28−0.34, uniformly glossy golden cream; retinaculum present; cilia golden cream, cilia line ill-defined. Hindwing grayish brown, with slight bronzy iridescence; male with a single short, slender, evenly curved frenular bristle, female with two slender bristles, shorter one 0.8× length of longer one; cilia pale yellow. Fore and mid legs dark brown; hind leg yellow.

Pregenital abdomen. First tergum with posterior 2/3 sclerotized. In male, coremata present in eighth segment; eighth sternite 0.5× as long as wide, posterior margin gently concave, without caudal process; eighth tergite trapezoidal, without caudal process. In female, seventh sternite semicircularly concave at middle on posterior margin.

Male genitalia ( Fig. 55 ). Vinculum slightly concave on both margins; medial process absent from ventrocaudal margin. Tegumen as deep as vinculum, deeply concave on anterior margin at middle, convex at middle on posterior margin. Uncus with shouldered base touching each other, forming a heart-like membraneous section with tegumen; uncus lobe as long as depth of vinculum, twisted at base, strongly contorted and overlapped in distal 1/3, forming sclerotized, bean sprout-shaped section with a small melanized nodule; sclerite absent between uncus lobes. Valva triangular, broad at base, narrowed to a small digitate distal process; costal margin with a large, wrinkled, subovate flap excurved from basal 1/4 obliquely running into inner surface; basal flange absent; ventral margin with obvious ventral lobe; basal margin with ‘secondary apodeme’ close to apodeme, represented only by a shallow convexity; inner surface unmodified except subovate flap. Juxta angled caudally, flat, trapezoidal, 0.5× length of aedeagus. Aedeagus stout, as long as valva, slightly bent ventrad, with very shallow dorsal emargination; double-walled: inner wall tubular, outer wall forming slender, triangular carinae subapically. Bulbus ejaculatorius 9.0−12.0× length of aedeagus, subdistal section semicircularly hypertrophied, distal section hypertrophied, 0.5× width of subdistal section, deep cup-shaped.

Female genitalia ( Fig. 81 ). Ovipositor length 2.2−2.7 mm. Eighth tergite tapered, anterior margin triangularly convex, posterior margin concave at middle and with sparse setae; microtrichiate on medial 1/3 and dorsal midline. Eighth sternite with dense microtrichia posterolaterally, deeply concave and with sparse setae on posterior margin, gently convex on anterior margin; a pair of small, knuckle-shaped processes posterior to eighth sternite. Ostium transverse, at medial concavity of posterior margin. Antrum absent; ductus bursae 1.3× length of corpus bursae, slightly broadened in anterior 1/5. Colliculum comprising a series of five rings, fourth ring thickly membraneous, others strongly sclerotized; first ring at anterior 1/6 of ductus bursae, broadly flanged, flower-like, with a pair of digitate processes invaginated into ductus bursae to level of second ring; second ring at junction of ductus bursae and corpus bursae, protruded ventrally; third ring close to second ring, skirt-like, slightly flanged on anterior margin; fourth ring differing in length among specimens; fifth ring flared anteriorly to form flanges which encircle and support corpus bursae; inception of ductus seminalis beneath postero-ventral margin of second ring. Corpus bursae thickened by presence of fourth ring posteriorly, thin and separated into two parts by flanges of fifth ring anteriorly; signum absent.

Distribution. China (Guangxi, Hainan).

Etymology. The specific name is derived from the Latin aureus, meaning golden, referring to the glossy golden cream forewing.

Remarks. In the female genitalia, the anterior region of the corpus bursae is membraneous and thin-walled, usually shrinks during dissection and is difficult to discern its shape. In two of the five females, the fifth collicular ring is absent, and thus the anterior region of the corpus bursae is not separated into two parts ( Fig. 81 a).

Figures

FIGURE 1. Distribution of Chinese Edosa spp. hemichrysella - group: ■ E. bicolor sp. nov.; subochraceella - group: ● E. subochraceella, ▲ E. smithaella, ★ E. varians sp. nov., ♦ E. aurea sp. nov., ♥ E. torta sp. nov.

FIGURES 18. Valva of Edosa spp. a, E. bicolor sp. nov.; b, E. robinsoni sp. nov.; c, E. curvidorsalis sp. nov.; d, E. longicornis sp. nov.; e, E. aurea sp. nov.; f, E. semicircularis sp. nov.; g, E. baculiformis sp. nov.; h, E. elongata sp. nov.; i, E. cornuta sp. nov.; j, E. minuta sp. nov.; k, E. digitata sp. nov.; l, E. orphnodes (The number indicates character and its state as shown in Appendix 1; slide numbers same as male genitalia shown in figures 52 − 79).

FIGURES 11 − 13. Morphology of Edosa spp. 11, metathorax, 11 a, metanotum (E. varians sp. nov., paratype, slide No. NKYLL 014); 12, Pregenital abdomen of male (E. varians sp. nov., holotype, slide No. YLL 11153); 13, Pregenital abdomen of female (E. aurea sp. nov., paratype, slide No. YLL 11175). (scale lines = 0.5 mm).

FIGURES 20 − 27. Adults of Edosa spp. 20, E. bicolor sp. nov., holotype, ♂; 21, E. subochraceella; 22, E. smithaella, ♂; 23, E. varians sp. nov., holotype, ♂; 24, E. aurea sp. nov., holotype, ♂; 25, E. torta sp. nov., holotype, ♂; 26, E. truncatula sp. nov., ♂; 27, E. hamata, sp. nov., holotype, ♂.

FIGURES 55 − 56. Male genitalia of Edosa spp. 55, E. aurea sp. nov., holotype, slide No. YLL 11181 (55 a, aedeagus; 55 b, uncus lobes; 55 c, valva); 56, E. torta sp. nov., paratype, slide No. YLL 10224 (56 a, aedeagus; 56 b, uncus lobes; 56 c, valva) (scale lines = 0.5 mm).

FIGURES 80 − 82. Female genitalia of Edosa spp. 80, E. varians sp. nov., paratype, slide No. YLL 11159 (80 a, variation of corpus bursae and colliculum, slide No. YLL 10094); 81, E. aurea sp. nov., paratype, slide No. YLL 11174 (81 a, variation of corpus bursae and colliculum, slide No. YLL 10236); 82, E. torta sp. nov., paratype, slide No. XYL 03133 (scale lines = 0.5 mm).