Edosa bifurcata 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 : 28-29

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

( Figs 3 , 34 , 65 , 87 )

Type material. Holotype ♂, CHINA: Jiman, Anchuixiang (25°20΄N, 109°19΄E), Rongshui, Guangxi Zhuang Autonomous Region, 650 m, 16.vii.2004, leg. Jiasheng Xu, genitalia slide No. XYL04189.

Paratypes: CHINA: Guangxi Zhuang Autonomous Region: 2 ♂, 1 ♀, Anchuixiang, Rongshui (25°20΄N, 109°19΄E), Jiman, 650 m, 16.vii.2004, leg. Jiasheng Xu, genitalia slide Nos. XYL04223m, YLL10245f; 1 ♀, Peixiucun (25°25΄N, 109°08΄E), Anxian, Rongshui, 579 m, 13.vii.2004, leg. Jiasheng Xu, genitalia slide No. XYL04203. Guangdong Province: 1 ♀, Dawuling Conservation Zone (22°14΄N, 111°12΄E), Xinyi, Maoming City, 1000 m, 8.viii.2003, leg. Dandan Zhang, genitalia slide No. YLL10212. Guizhou Province: 1 ♂, Huaxi (26°26΄N, 106°40΄E), Guiyang, 900 m, 11.ix.2004, leg. Jialiang Zhang, genitalia slide No. YLL10014.

Diagnosis. This new species is superficially similar to E. crayella Robinson, 2008 by the forewing having a faint darker dot at the end of the cell, but can be differentiated from each other by the genitalia characters. In the new species, the triangular valva has a clubbed basal flange, and the aedeagus is bifurcate apically in the male genitalia; and the eighth sternite is specialized into two parts in the female genitalia. In E. crayella , the broad crescent-shaped valva has a large, triangular basal flange, and the aedeagus is not bifurcate; and the eighth sternite is not specialized into two parts.

Description. Adult ( Fig. 34 ). Wingspan 11.5−18.0 mm. Head dull orange yellow. Antenna 0.8× length of forewing; scape light orange yellow, with a few brownish pecten bristles; flagellum unicolorous, bright yellowish. Labial palpus yellowish brown mixed with darker scales on inner surface, blackish brown on outer surface. Thorax and tegula ferruginous brown. Forewing index 0.32−0.35, yellowish brown, individual scales dark tipped, with a faint darker dot at end of cell; retinaculum present; cilia grayish brown, with dark-tipped scales. Hindwing grayish brown; male with a single short, slender, evenly curved frenular bristle, female with two slender bristles, shorter one 0.75× length of longer one; cilia grayish brown. Fore leg dark brown; mid leg yellowish brown mixed with dark brown; hind leg yellowish brown, tarsus with scattered darker scales.

Pregenital abdomen. First tergum with posterior 2/3 sclerotized. In male, coremata present in eighth segment; eighth sternite 0.25× as long as wide, without caudal process; eighth tergite trapezoidal, without caudal process. In female, seventh sternite semicircularly concave at middle on posterior margin.

Male genitalia ( Fig. 65 ). Vinculum with anterior and posterior margins straight, parallel, medial process on ventrocaudal margin short, hillock-shaped, 0.25× length as depth of vinculum. Tegumen about 0.15× depth of vinculum, semicircularly concave on both anterior and posterior margins. Uncus with broad fan-shaped base interrupted by traces of uncus lobes, not forming a membraneous section with tegumen; uncus lobe 0.75× depth of vinculum, not twisted, broader and slightly bent ventrad towards apex, fused and laterally sclerotized in basal half, separated, membraneous, expanded and setose in distal half; sclerite absent between uncus lobes. Valva short, triangular, narrowed basally, broadened distally, melanized and bearing long setae dorso-apically, smooth and triangularly protruded ventral-apically; costal margin slightly sinuate, unmodified; basal flange large and stout, heavily sclerotized, melanized and clubbed, with long setae; ventral margin slightly convex in distal half, without ventral lobe; basal margin with inconspicuous ‘secondary apodeme’; inner surface unmodified. Juxta reflexed anteriorly along inner surface of vinculum, minute, 0.25× length of aedeagus. Aedeagus stout, 2.0× length of valva; apex bifurcate, dorsal lobe sword-shaped, with blunt apex, ventral lobe hooked at apex, triangular subapically. Bulbus ejaculatorius short, 1.5× length of aedeagus, expanded at base, not hypertrophied in subdistal and distal sections.

Female genitalia ( Fig. 87 ). Ovipositor length 3.4−3.6 mm. Eighth tergite tapered anteriorly, slightly concave at middle on posterior margin, with sparse setae on posterior 1/4, microtrichiate from posterior 1/4 to middle. Eighth sternite highly specialized into two parts: posterior half represented by a pair of microtrichiate, rhombic sclerites, with sparse setae on posterior margin; anterior half a pair of subrounded sclerites, each bearing a shallow erect ridge medially, with sparse setae posteriorly. Ostium at middle of eighth sternite. Antrum absent; ductus bursae simple, as long as corpus bursae, moderate in width. Colliculum comprising a pair of band-shaped, spinose processes arising from posterior margin of corpus bursae, crossing second ring to posterior 1/4 of corpus bursae, broad and joined basally, tapered distally; second ring at posterior 1/5 of corpus bursae, very narrow and unmodified, in some specimens including the type with longitudinal striae adjacent to second ring anteriorly; inception of ductus seminalis dorsal, at margin of second ring. Corpus bursae ovate; signum absent.

Distribution. China (Guangdong, Guangxi, Guizhou).

Etymology. The specific name is derived from the Latin bifurcatus, meaning bifurcate, referring to the bifurcate apex of the aedeagus.

Figures

FIGURE 3. Distribution of Chinese Edosa spp. eminens - group: ■ E. baculiformis sp. nov., ● E. eminens sp. nov., crayella - group: ▲ E. bifurcata sp. nov., ★ E. crayella, ♦ E. orphnodes

FIGURES 28 − 35. Adults of Edosa spp. 28, E. robinsoni sp. nov., paratype, ♀; 29, E. duoprojecta sp. nov., holotype, ♂; 30, E. carinata sp. nov., holotype, ♂; 31, E. curvidorsalis sp. nov., holotype, ♂; 32, E. baculiformis sp. nov., holotype, ♂; 33, E. eminens sp. nov., holotype, ♂; 34, E. bifurcata sp. nov., holotype, ♂; 35, E. crayella, ♂.

FIGURES 65 − 67. Male genitalia of Edosa spp. 65, E. bifurcata sp. nov., holotype, slide No. YLL 04189; 66, E. crayella, slide No. YLL 10123; 67, E. orphnode s (67 a, slide No. XYL 08107, Yunnan, China; 67 b, paralectotype, BMNH (E) # 1054807, slide No. 10023) (scale lines = 0.5 mm).

FIGURES 86 − 88. Female genitalia of Edosa spp. 86, E. baculiformis sp. nov., paratype, slide No. XYL 10131; 87, E. bifurcata sp. nov., paratype, slide No. XYL 04203; 88, E. crayella Robinson, slide No. YLL 10063 (scale lines = 0.5 mm).