Promalactis grandaedeaga Wang, 2020

Wang, Shuxia & Liu, Chen, 2020, Taxonomic study of the genus Promalactis Meyrick, 1908 (Lepidoptera Oecophoridae). VII. The cornigera species group, with descriptions of six new species, Zootaxa 4718 (1), pp. 77-86 : 80-83

Promalactis grandaedeaga Wang , sp. nov.

( Figs 3 , 9 )

Type material. CHINA, Sichuan Province: Holotype ♂, Baliping (30.77°N, 103.22°E), Anzi River, Chengdu , 1706 m, 24.VI.2016, coll. Kaijian Teng and Xiaofei Yang, slide No. JYY17501 . Paratype: Guizhou Province: 1♂, Limingguan , Libo County, 720 m, 19.VII.2015, coll. Meiqing Yang and Jiaen Li, slide No. LC 19093 .

Diagnosis. This new species can be distinguished by the valva having a large overlapped triangular area reaching the dorsal margin of the sacculus and a relatively long cornutus (about 1/3 the length of the aedeagus). It is similar to P. flavidilineata superficially and in the male genitalia, and the differences between the two species are given in the diagnosis of the preceding species.

Description. Adult ( Fig. 3 ). Wingspan 10.0‒ 12.5 mm. Head yellow. Labial palpus whitish yellow, second seg- ment with brown scales on outer surface basally, third segment black distally except whitish yellow at apex. Antenna black, flagellum annulated with whitish yellow on dorsal surface. Thorax orange yellow; tegula brown except orange yellow distally. Forewing pale ochreous yellow; costal area covered with dark ochreous brown scales intermixed with black and silvery grey scales along basal 2/3, forming a wide dark costal band more than 1/3 width of wing medially; dorsum with blackish-brown scales, with two parallel white streaks from basal 1/3 and from beyond distal 1/4, respectively, both streaks crossing fold and edged with a few black scales along inside; tornal spot black; apical spot black, diffused; cilia orange yellow along distal part of costal margin, yellow from apex along termen to end of fold. Hindwing and cilia grey.

Male genitalia ( Fig. 9 ). Uncus broad at base, narrowed to about basal 2/5; distal 3/5 slender, slightly narrowed to apex, with sparse setae laterally. Gnathos slightly shorter than uncus, broad lingulate, rounded apically, scaly distally. Valva with basal 2/3 subparallel, distal 1/3 narrowed to rounded apex; costa slightly concave at base, convex at about middle, with a densely setose, overlapped triangular area from between distal 2/5 and apex extending to dorsal margin of sacculus. Sacculus with basal half uniform, distal half slightly narrowed, concave at middle dorsally, produced to pointed apex directing dorsad. Juxta broad U-shaped, connected at base by a narrow straight band; lateral arm shorter than uncus, sub-triangular, sclerotized distally, acute and reaching posterior 2/3 of tegumen apically. Aedeagus extremely large, approximately 2.5 times length of valva, uniform except slightly dilated basally; cornutus being a large spine, approximately 1/3 length of aedeagus, running from basal 1/5 to a little beyond middle.

Female unknown.

Distribution. China (Guizhou, Sichuan).

Etymology. The specific epithet is derived from the Latin grandis and the Latin term aedeagus, referring to the extremely large aedeagus.

Figures

FIGURES 1‒6. Adults of Promalactis spp. 1, P. albipectinalis, holotype, ♂; 2, P. flavidilineata, holotype, ♂; 3, P. grandaedeaga, holotype, ♂; 4, P. latignatha, holotype, ♂; 5, P. malipoensis, holotype, ♂; 6, P. voluta, holotype, ♂. Scales = 2 mm.

FIGURES 7‒12. Male genitalia of Promalactis spp. 7, P. albipectinalis, holotype, slide No. JYY17535; 8, P. flavidilineata, holotype, slide No. DZH12266; 9, P. grandaedeaga, holotype, slide No. JYY17501; 10, P. latignatha, holotype, slide No. ZMUC- NK010; 11, P. malipoensis, holotype, slide No. JYY17448; 12, P. voluta, holotype, slide No. JYY17515. Scales = 0.2 mm.