Helcystogramma brevinodium, Li & Zhen, 2011

Li, H. H. & Zhen, H., 2011, Review of the genus Helcystogramma Zeller (Lepidoptera: Gelechiidae: Dichomeridinae) from China, Journal of Natural History 45 (17 - 18), pp. 1035-1087 : 1070-1071

Helcystogramma brevinodium sp. nov.

( Figures 4B , 8F , 10I , 12D )

Holotype

Male, CHINA: Hebei Province: Mt Xiantai, Jingxing (38 ◦ 01 ′ N, 114 ◦ 01 ′ E), 1200 m, 23 July 2000, coll. Haili Yu et al., genitalia slide no. LZD01068.

Paratype

CHINA: Tianjin: 1 male, Mt Jiulong, Jixian (40 ◦ 02 ′ N, 117 ◦ 24 ′ E), 130 m, 9 June 2004, coll. Houhun Li.

Diagnosis

Helcystogramma brevinodium sp. nov. is distinguishable from other species of the triannulella group by the third segment of the labial palpus about one-third length of second, and the aedeagus not hooked apically but with a small process near apex in the male genitalia. It is similar to H. arotraeum (Meyrick) by the valva slightly narrowed medially and shorter than the tegumen–uncus complex, but differs from it in the forewing with the colour on costal margin and along veins the same as the ground colour, and the lobes of vinculum bluntly rounded dorsoapically in the male genitalia.

Description

Adult ( Figures 4B , 8F ): Wingspan 15.0 mm. Head yellowish-brown. Antenna with scape yellowish-brown on dorsal surface, yellowish-white on ventral surface; flagellum alternately greyish-brown and dark brown on dorsal surface, ochreous on ventral surface. Labial palpus with second segment about three times length of diameter of eye, third segment short, about one-third length of second; yellowishbrown except yellowish-white on dorsal surface. Thorax and tegula ochreous-brown. Forewing with costal margin straight, dorsum slightly protruding at two-thirds length, apex bluntly rounded, termen oblique, straight; ground colour ochreous-brown, mottled brown scales distally, with brown spot near end of cell; fringe yellowish-brown except yellowish-white basally on termen. Hindwing grey; fringe pale grey except greyish-white at base. Fore- and midlegs yellowish-brown on outer surface, femora and tibiae ochreous and tarsi pale brown on inner surface; hindleg yellow on outer surface, pale yellow on inner surface.

Male genitalia

Uncus somewhat narrow rectangular, narrowest at one-third length, bluntly rounded on posterior margin, with sparse setae on dorsal surface and spicules on ventral surface; about one-third length of valva ( Figure 12D ). Gnathos slightly curved near base; culcitula broad trapeziform, almost straight posteriorly. Valva slightly narrowed mesially, bluntly rounded apically, shorter than tegumen–uncus complex; ventral free lobe narrowed gradually from base to bluntly rounded apex, with sparse long setae. Vinculum with lobes sharp ventroapically, bluntly rounded dorsoapically. Aedeagus ellipsoidal in basal two-fifths, narrowed gradually in distal three-fifths, with a small, apex-rounded subapical process. Eighth tergite broadly triangular, anterior margin concave on mesial half, posterior margin rounded ( Figure 10I ).

Female

Unknown.

Distribution

China (Hebei, Tianjin).

Etymology

The specific name is derived from the Latin brevinodius, meaning short, referring to the relatively short third segment of the labial palpus.

Figures

Figure 4. Head of Helcystogramma spp. (A) Ocellus of H. perelegans (Omelko and Omelko); (B–D) labial palpus: (B) H. brevinodium sp. nov. holotype male; (C) H. rectangulum sp. nov. paratype male; (D) H. angustum sp. nov. paratype male.

Figure 8. Adults of Helcystogramma spp. (A) H. flavifuscum sp. nov., holotype male; (B) H. arotraeum (Meyrick), female; (C) H. fuscomarginatum Ueda, male; (D) H. lutatella (Herrich- Schäffer), male; (E) H. triannulella (Herrich-Schäffer), male; (F) H. brevinodium sp. nov., holotype male.

Figure 10. (A–Q) Male abdominal eighth tergite of Helcystogramma spp. (A) H. flavilineolella Ponomarenko, slide no. ZH06459; (B) H. bicuneum (Meyrick), slide no. ZH06476; (C) H. epicentra (Meyrick), slide no. ZJL05249; (D) H. perelegans (Omelko et Omelko), slide no. ZH07574; (E) H. flavifuscum sp. nov., holotype, slide no. ZJL05145; (F) H. arotraeum (Meyrick), slide no. ZH07202; (G) H. fuscomarginatum Ueda, slide no. ZH06219; (H) H. lutatella (Herrich- Schäffer), slide no. L94400; (I) H. brevinodium sp. nov., holotype, slide no. ZH06114; (J) H. hassenzanensis Park et Hodges, slide no. L95013; (K) H. trijunctum (Meyrick), slide no. L00163; (L) H. albilepidotum sp. nov., holotype, slide no. ZH06324; (M) H. angustum sp. nov., holotype, slide no. ZH06467; (N) H. flavistictum sp. nov., holotype, slide no. L94242; (O) H. furvimaculare sp. nov., holotype, slide no. ZH06154; (P) H. imagitrijunctum sp. nov., holotype, slide no. L94299; (Q) H. rectangulum sp. nov., holotype, slide no. L95025. (R) I–III sternum of H. flavilineolella Ponomarenko, slide no. ZH06459.

Figure 12. Male genitalia of Helcystogramma spp. (A) H. arotraeum (Meyrick), genitalia slide no. ZH07202; (B) H. fuscomarginatum Ueda, genitalia slide no. ZH06219; (C) H. lutatella (Herrich-Schäffer), genitalia slide no. ZH06465; (D) H. brevinodium sp. nov., holotype, genitalia slide no. LZD01068; (E) H. hassenzanensis Park et Hodges, genitalia slide no. L95013; (F) H. trijunctum (Meyrick), genitalia slide no. ZH06071.