Halolaguna discoidea, Teng, Kaijian, Liu, Shurong & Wang, Shuxia, 2014

Teng, Kaijian, Liu, Shurong & Wang, Shuxia, 2014, Taxonomic study of the genus Halolaguna Gozmany (Lepidoptera, Lecithoceridae) from China, with descriptions of two new species, ZooKeys 464, pp. 99-110 : 102

Taxon classification Animalia Lepidoptera Lecithoceridae

Halolaguna discoidea sp. n. Figs 1a, 2a, 3a, 4a

Type material.

Holotype ♂, China: Tudiyan, Mt. Simian (28°60'N, 106°40'E), Chongqing, 1200 m, 15.vii.2012, leg. Yinghui Sun and Aihui Yin, genitalia slide No. TKJ13023. Paratypes: 1 ♂, Mt. Simian, Chongqing, 1000 m, 21.vii.2010, leg. Xicui Du and Shengwen Shi; 1 ♂, same locality, 22.vii.2010, leg. Xicui Du and Lifang Song, genitalia slide No. WYQ13157, venation slide No. TKJ14008W; 1 ♂, 2 ♀, Labahe (30°17'N, 102°29'E), Tianquan County, Sichuan Province, 1300 m, 28.vii.2004, 29.vii.2004, leg. Yingdang Ren; 1 ♀, Mt. Daming (23°24'N, 108°30'E), Nanning, Guangxi Zhuang Autonomous Region, 1200 m, 5.viii.2011, leg. Shulian Hao and Yinghui Sun, genitalia slide No. TKJ14004.

Diagnosis.

This species is similar to Halolaguna oncopteryx (Wu, 1994) and Halolaguna flabellata sp. n. in the forewing shape and the male genitalia, but can be separated from these by the juxta with thin claviform postero-lateral lobes slightly longer than the juxta, and the aedeagus with a discal process apically. In Halolaguna oncopteryx (Wu, 1994) and Halolaguna flabellata sp. n., the postero-lateral lobes of the juxta are short finger-shaped, about 1/2 length of the juxta, and the aedeagus is absent of discal process apically.

Description.

Adult (Figs 1a, 2a) with wing expanse 16.5-18.0 mm. Head yellowish white, with scattered brown scales. Antenna yellowish white, scape brown on ventral surface, flagellum with pale brown annulations. Labial palpus yellowish white, with scattered brown scales; second segment with appressed scales; third segment slender, about same length as second. Thorax brown, tegula purple brown. Forewing with costal margin almost straight from basal 1/4 to 3/4; apex protruding triangularly; termen oblique, concave below apex; ground color deep grayish brown; subapical spot yellowish white, nearly triangular; discal and discocellular spots blackish brown, nearly rounded; a yellowish white line extending from costal 2/5 to above fold, edged with blackish brown scales along inner margin, curved triangularly inward to outer margin of discal spot; cilia blackish brown, yellowish white basally; venation: R3 stalked with R4+5 for basal half of its length, R4 and R5 stalked for 2/3 length, R5 to termen, M1 and R3+4+5 from upper angle of cell, M2 absent, M3 from above lower angle of cell, CuA1 and CuA2 shortly stalked at base, from lower angle of cell, cell closed. Hindwing and cilia grayish brown, yellowish white basally; venation: Rs and M1 stalked for 2/5 length, M3 and CuA1 stalked for about 1/3 length, remote from M2, cell close partly. Fore leg with ventral surface brown, dorsal surface yellowish white, mottled brown scales, tarsus yellowish white on distal 1/3; mid leg yellowish white, mottled brown scales on ventral surface; hind leg blackish brown, yellowish white on dorsal surface of tibia and on distal half of tarsus.

Male genitalia (Fig. 3a): Uncus broad at base, narrowed to middle, distal half nearly parallel sided, bearing setae laterally, broadly rounded apically. Gnathos short, nearly triangular, curved distally, pointed apically. Valva broad at base, distinctly narrowed to middle, then slightly narrowed to narrowly rounded apex; costa gently concave beyond middle; ventral margin nearly straight. Sacculus narrow, reaching 1/3 length of dorsum. Juxta nearly quadrate, slightly convex antero-medially, almost straight posteriorly; postero-lateral lobe thin claviform, bearing setae laterally, bluntly rounded apically, longer than juxta. Vinculum narrow. Aedeagus stout, slightly longer than valva, broad basally, narrowed to apex; basal half with dense spinules, distal 2/5 with dense granules, apically produced to a discal process.

Female genitalia (Fig. 4a): Eighth sternite with caudal margin deeply concave in U shape at middle, bearing dense setae laterally. Posterior apophyses about twice length of anterior apophyses. Antrum inconspicuous. Ductus bursae long and heliciform, about four times length of corpus bursae, slightly narrow basally, with numerous thumbtack-shaped spinules ranging from basal 1/4 to 1/2; ductus seminalis slender and long, arising from basal 1/4 of ductus bursae. Corpus bursae oval; signum nearly oval, placed at middle of corpus bursae, margined with teeth anteriorly and posteriorly, medially concave, forming a broad and flat central groove.

Distribution.

China (Chongqing, Guangxi, Sichuan).

Etymology.

The name of this species is derived from the Latin adjective discoideus (discal), in reference to the discal process of the aedeagus at apex.