Edosa torta 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 : 18-19

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

( Figs 1 , 25 , 56 , 82 )

Type material. Holotype ♂, CHINA: Botanical Garden, Menglun (21°52'N, 101°18'E), Yunnan Province, 570m, 13.viii.2005, leg. Yingdang Ren, genitalia slide No. XYL08071.

Paratypes: CHINA: Yunnan Province: 1 ♂, 1 ♀, Botanical Garden (21°55'N, 101°16'E), Mengla, 21.xi.1987, leg. Houhun Li, genitalia slide Nos. YLL 10224 m, XYL03133f.

Diagnosis. Edosa torta sp. nov. is simiar to E. aurea sp. nov. in both male and female genitalia, but can be easily separated by the forewing pale yellowish brown in this species, but glossy golden cream in E. aurea sp. nov. Apart from this difference, the features of the uncus lobe and the valva separate the two: the uncus lobe is contorted distally to form a flat, rhombic section, and the valva is unmodified on costal margin in E. torta sp. nov.; while the uncus lobe is strongly contorted and overlapped distally to form a bean sprout-shaped section, and the valva has an excurved, large, ovate flap on the costal margin in E. aurea sp. nov. Besides, the coremata are absent in E. torta sp. nov., but present in E. aurea sp. nov.

Description. Adult ( Fig. 25 ). Wingspan 17.0−19.5 mm. Head dusty yellow. Antenna yellowish white, 0.8× length of forewing; scape without pecten, flagellum unicolorous. Labial palpus yellowish white mixed with brown on inner surface, yellowish brown on outer surface. Thorax and tegula yellowish brown. Forewing index about 0.32, uniformly pale yellowish brown; retinaculum present; cilia yellowish brown with darker tips, with three illdefined cilia lines. 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 brown. Fore and mid legs dark brown; hind leg yellow.

Pregenital abdomen. First tergum with posterior 2/3 sclerotized. In male, coremata absent 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. 56 ). Vinculum gently concave on both margins; medial process absent from ventrocaudal margin. Tegumen as deep as vinculum, deeply concave at middle on anterior margin, 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, contorted distally, forming a flat, rhombic section that bears a mastoid apical process and a small melanized nodule on inner side; sclerite absent between uncus lobes. Valva subtriangular, broad at base, narrowed to a small digitate distal process; costal margin convex in basal half, concave in distal half, unmodified; 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 with basal area near costal margin finely rugose. Juxta angled caudally, flat, trapezoidal, 0.5× length of aedeagus. Aedeagus stout, slightly bent ventrad, with very shallow dorsal emargination; double-walled: inner wall tubular, outer wall forming slender, triangular carinae subapically. Bulbus ejaculatorius about 11.0× length of aedeagus, subdistal section semicircularly hypertrophied, distal section hypertrophied, 0.5× width of subdistal section, deep cup-shaped.

Female genitalia ( Fig. 82 ). Ovipositor length 3.5 mm. Eighth tergite tapered, anterior margin triangularly convex, posterior margin concave at middle and with sparse setae; microtrichiate in medial 1/4 and on dorsal midline. Eighth sternite almost straight and with sparse setae on posterior margin, gently convex at middle on anterior margin; a pair of small, knuckle-shaped processes posterior to eighth sternite. Ostium at middle of posterior margin of eighth sternite. Antrum absent; ductus bursae as long as corpus bursae. 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, broad, protruded ventrally; third ring close to second ring, skirt-like, narrower than second ring; fourth ring elongate, slightly sclerotized in anterior half; 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 thickly membraneous posteriorly by the presence of colliculum, thinly membraneous region missing; signum absent.

Distribution. China (Yunnan).

Etymology. The specific name is derived from the Latin tortus, meaning twisted, referring to the basally twisted uncus lobe.

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 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).