Agonopterix ventrangulata, Lvovsky, Alexandr L. & Wang, Shuxia, 2011

Lvovsky, Alexandr L. & Wang, Shuxia, 2011, Five species of the genus Agonopterix Hübner (Lepidoptera: Depressariidae) from China, Zootaxa 3053, pp. 63-68 : 64-67

Agonopterix ventrangulata sp. nov.

(Figs. 3, 8)

Type material. Holotype: 3, China: Yong’an, Fujian Province, 5.vi.1981, leg. Xinwang Tong, genitalia slide No. 89045, deposited in the Institute of Zoology, Chinese Academy of Sciences.

Diagnosis. This species is similar to A. costaemaculella superficially, but can be distinguished from it by the smaller body size and the rhombic costal patch on the forewing; by the ventral margin of the valva which is slightly concave in the distal third and angulate at two-thirds; and the cuiller extended upward to only two-thirds the width of the valva. In A. costaemaculella , the body is larger and the costal patch is triangular; the valva is smoothly curved along the distal 4/7 of the ventral margin; and the cuiller almost reaches the costa of the valva.

Description. Adult (Fig. 3): Forewing span 20.0 mm. Head grayish white on vertex, grayish brown laterally; grayish white mottled grayish brown posteriorly. Antenna with scape grayish black, ringed with grayish white at apex; flagellum blackish brown and pale brown alternately. Labial palpus upcurved; with basal segment grayish black dorsally, grayish white ventrally; middle segment thick, grayish black mixed with grayish white, with appressed scales; apical segment thin, about 3/5 length of second, yellowish white except base and distal 1/3 densely covered with grayish black scales. Thorax and tegula grayish black. Forewing with costal margin gently arched, dorsum nearly straight, termen obliquely straight, apex slightly protruding; ground colour grayish white, tinged with yellowish brown; large triangular black patch at base; costal margin scattered with numerous grayish black dots and short streaks; large rhombic patch situated beyond costal 3/5, which consists of three inconspicuous longitudinal short black stripes; discal spot black, with white dot at inside; black spot in middle of cell; termen with five almost evenly spaced short grayish black strips; cilia grayish white. Hindwing grayish brown; cilia gray.

Male genitalia (Fig. 8): Socii short, inconspicuous, with dense setae on posterior margin. Gnathos nearly rounded. Valva broad at base, narrowed to rounded apex; costa sclerotized, concave medially; ventral margin concave along distal 1/3, forming an angle at basal 2/3. Sacculus about 1/2 length of valva; cuiller reaching 2/3 width of valva, with strongly incurved distal 1/3, apex narrowly rounded. Juxta subrounded, concave at middle on posterior margin. Aedeagus strongly curved, C-shaped, almost uniform in thickness, acute at apex, with cluster of fine spines inside.

FIGURES 1–5. Adults of Agonopterix spp.: 1, A. likiangella , sp. nov., holotype; 2, A. leptopa (Diakonoff) ; 3, A. ventrangulata , sp. nov., holotype; 4, A. hoenei , sp. nov., holotype; 5, A. burmana Lvovsky.

FIGURES 6–11. Male genitalia of Agonopterix spp.: 6, A. likiangella , sp. nov., holotype; 7, A. leptopa (Diakonoff) , holotype; 8, A. ventrangulata , sp. nov., holotype; 9, A. hoenei , sp. nov., holotype; 10, A. costaemaculella (Christoph) ; 11, A. burmana Lvovsky. Female: Unknown.

Distribution. China, Fujian (Yong’an).

Etymology. The specific name is from the Latin prefix ventr -, meaning ventral, and the Latin angulatus, meaning angulate, in reference to the angle at basal 2/3 on the ventral margin of the valva.