Exaeretia liupanshana Wang

Liu, Shurong & Wang, Shuxia, 2010, One new species and three newly recorded species of the genus Exaeretia Stainton, 1849 (Lepidoptera: Elachistidae: Depressariinae) from China, Zootaxa 2444, pp. 45-50 : 46-48

Exaeretia liupanshana Wang , sp. nov.

( Figs. 1 , 5 , 9 )

Type material. Holotype: 3, China: Heshangpu, Mt. Liupan (35°24΄N, 106°14΄E), Guyuan, Ningxia Huizu Autonomous Region, 2100 m, 9.vii.2008, coll. Shulian Hao and Zhiwei Zhang, genitalia slide no. ZL08247. Paratypes: 1 3, 1 ♀, same data as for holotype except male labeled 27.vi.2007.

Diagnosis. The new species is more similar to E. allisella Stainton, 1849 than to other congeners and hardly distinguishable from the latter by the superficial characters. However, it can be distinguished from E. allisella by the sacculus with the inner lobe of the distal process thinner than and about same length as the outer one, exceeding two-thirds width of valva in the male genitalia; and the signum placed posteriorly, only slightly exceeding middle of the corpus bursae anteriorly in the female genitalia. In E. allisella Stainton , the inner lobe of the distal process extends upward to about half way of the valva and is obviously shorter than the outer one; the signum is extremely elongate, extending from base to anterior end of the corpus bursae.

Description. Adult ( Fig. 1 ): Wingspan 14.5−16.5 mm. Head greyish-brown, mixed with whitish grey. Antenna with scape black, flagellum pale brown. Labial palpus greyish white on dorsal surface, brown on ventral surface; second segment medially furrowed beneath in distal 2/3; third segment shorter than half length of second, pointed at end. Thorax and tegula pale grey. Forewing more or less rectangular, costal margin gently arched; ground colour deep grey, densely mottled greyish-ochreous and dirty white scales, with large black diffusion at base; costal margin with greyish white dots; white fascia extending obliquely from 1/3 of costal margin to near tornus; discal and discocellular stigmata blackish brown, the former smaller; dorsal margin greyish white at base. Hindwing and cilia pale greyish-brown. Fore and mid legs dark brown except tibiae and tarsi white on outer side; hind leg greyish-white except greyish brown on ventral surface.

Male genitalia ( Fig. 5 ): Uncus with visible vestige. Socius semicircular, densely setose along posterior margin. Gnathos oval. Valva slightly wide at base, narrowed toward rounded apex; costa with sclerotized edge. Sacculus wide, sclerotized; distal process with inner lobe thinner than and about same length as outer one, upward exceeding two-thirds of valva; outer lobe stout, triangular, wide at base, gradually narrowed to pointed apex. Saccus irregularly trapezoidal, bluntly rounded anteriorly. Juxta cordiform, concave at middle on posterior margin; lateral lobes narrow and long, extending upward to near posterior margin of juxta. Phallus about half length of valva; cornuti consisting of numerous fine spines, about half length of phallus.

Female genitalia ( Fig. 9 ): Apophyses posteriores thicker than and about twice length of apophyses anteriores. Ostium bursae rounded, anterior margin somewhat straight. Ductus bursae membranous, thick, shorter than corpus bursae, with a larger sclerotized rounded plate near corpus bursae. Corpus bursae large elliptical; signum large leaflike in shape, densely toothed, placed posteriorly, slightly exceeding middle of corpus bursae anteriorly.

Distribution. China (Ningxia).

Etymology. The name of this species is derived from the type locality.

Figures

FIGURES 1 – 4. Adults of Exaeretia spp.: 1, E. liupanshana Wang, sp. nov. (paratype, 3); 2, E. lechriosema (Meyrick); 3, E. indubitatella (Hannemann); 4, E. ciniflonella (Lienig & Zeller).

FIGURES 5 – 8. Male genitalia of Exaeretia spp.: 5, E. liupanshana Wang, sp. nov. (holotype, genitalia slide no. ZL 08247); 6, E. lechriosema (Meyrick); 7, E. indubitatella (Hannemann); 8, E. ciniflonella (Lienig & Zeller).

FIGURES 9 – 11. Female genitalia of Exaeretia spp: 9, E. liupanshana Wang, sp. nov. (paratype, genitalia slide no. ZL 08245); 10, E. lechriosema (Meyrick); 11, E. indubitatella (Hannemann).