Sycacantha typicusivalva Feng & Yu, 2019

Feng, Weixing, Zhuang, Jialiang & Yu, Haili, 2019, Sycacantha Diakonoff, 1959 from China, with the descriptions of three new species (Lepidoptera: Tortricidae: Olethreutinae), Zootaxa 4691 (3), pp. 201-214 : 210-211

Sycacantha typicusivalva Feng & Yu , sp. nov.

( Figs. 6 , 12 )

Types. Holotype: China: ♂, Dongan (26°24’N, 111°17’E), Hunan Province, alt. 30 m, collectors unknown, geni- talia slide no. YHL07084 . Paratypes: 3♂, Sun River nature reserve (22°48’N, 100°58’E), Pu’er , Yunnan Province, 7–9.VI.2015, leg. Zhenguo Zhang.

Diagnosis. Sycacantha typicusivalva resembles S. inopinata Diakonoff, 1973 and S. siamensis Diakonoff, 1971 in the character of valva of the male genitalia. It can be distinguished from them by the triangular inner part of the socius longer and broader than the outer part. In the latter two species, the inner part of socius is finger-like and narrower than the outer part; and in S. inopinata , the two parts of the socius are equal in length.

Description. Adult ( Fig. 6 ). Head: Vertex pale yellowish brown, dusted with dark brown. Antenna pale yellowish brown. Labial palpus ascending, white suffused with pale yellow; median segment not expanded; terminal segment pale gray.

Thorax: Dark brown basally, mixed with pale yellow medially and posteriorly; collar and tegula pale yellow, mixed with dark brown, tegula with basal 1/4 dark brown. Hind tibia white suffused with pale yellow, with conspicuously enlarged tuft and two hair pencils in male, one yellowish brown, one white. Forewing length 8.5–9.0 mm; subrectanguar, costa arched, apex obtuse, termen straight; upperside ground color yellow mixed with white; markings blackish dark brown; costal strigulae with basal four pairs pale yellow, distal five pairs white, with distinct leaden striae; basal fascia and subbasal fascia confluent, represented by irregular, narrow, broken stripes and patches, distal edges extending from costa to base of dorsum, via midlength of Sc and low edge of cell, lower part confluent with a triangular blotch between 2/5 length of fold and basal 1/4 of dorsum, also brokened into irregular stripes; narrow stripes scattered between striae of strigulae three and four; media fascia dusted with yellow, with an extra pair of pale yellow costal strigula on midlength of upper edge, proximal edge almost straight, reaching midlength of dorsum, distal edge extending to end of dorsum, serrate, via midlength of R 2, upper edge of cell between R 2 and R 3, 1/5 length of R 4, outer edge of cell on M 1, 1/3 length of M 1, lower angle of cell, 2/5 length of CuA 2, 1/3 length of M 3, 3/4 length of CuA 2; area between media fascia and postmedian fascia with leaden stria from strigula five; postmedian fascia between 3/4 length of R 3 and distal 1/4 of M 3, arched, narrow, densely dusted with yellow proximally, proximal edge discontinuous, interrupted medially by a leaden dot of stria five, distally surrounded by a narrow leaden stria from strigula six; a narrow stripe from costa between strigulae seven and eight confluent with preterminal fascia, suffused with yellow, extending obliquely to termen on M 1, then along termen to M 3; terminal fascia a small spot; cilia dark brown mixed with yellow and white; underside gray brown, costal strigulae yellow brown, area of hindwing overlap white. Hindwing upperside dark brown except costal area of forewing overlap white, cilia gray white, with dark brown baseline; with cubital pecten present; underside dark brown.

Abdomen: Male genitalia ( Fig. 12 ) with tegumen a slightly broadened distally, but not expanded. Socius weakly sclerotized, broad and cleft; inner part wide angular, more than twice as wide as outer part, evenly covered with spines; outer part small, a short prominence, with dense spines apically. Gnathos a narrow band, further narrowed laterally. Valva with basal part spindle-shaped, sacculus densely covered with short spines distally, spines on neck somewhat sparse; cucullus densely covered with spines, with base expanded ventrally to a rounded process, with a strong thorn apically, distal 2/3 of cucullus almost uniform in width, about 2/3 times as broad as base. Phallus short and thick, weakly sclerotized distally; cornuti a dense cluster of short spines.

Female unknown.

Etymology. The specific name comes from the Latin typicus (= typical) and valva, referring to the shape of valva in the male genitalia.

Figures

FIGURES 2–7. Adults of Sycacantha species. 2. S. camarata, sp. nov., male, holotype; 3. S. camarata, sp. nov., female, paratype; 4. S. decursiva, sp. nov., male, holotype; 5. S. diserta (Meyrick, 1909), comb. nov., male; 6. S. typicusivalva, sp. nov., male, holotype; 7. Phaecasiophora obtundana (Kuznetsov, 1988), comb. nov., male.

FIGURES 8–14. Genitalia of Sycacantha species.8. Male genitalia of S. camerata, sp. nov., holotype(gen. slideno.FWX18058); 9. Male genitalia of S. decursiva, sp. nov., holotype (gen. slide no. FWX18114); 10–11. Male genitalia of S. diserta, comb. nov. (gen. slide no. FWX18013); 12. Male genitalia of S. typicusivalva, sp. nov., holotype (gen. slide no. YHL07084); 13. Male genitalia of Phaecasiophora obtundana, comb. nov. (gen. slide no. FWX18015); 14. Female genitalia of S. camerata, sp. nov., paratype (gen. slide no. FWX18036).