Sycacantha camarata 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 : 205-206

Sycacantha camarata Feng & Yu , sp. nov.

( Figs. 2, 3 , 8, 14 )

Types. Holotype: China: ♂, Yexiang Valley, Xishuangbanna (22°01’N, 100°48’E), Yunnan Province, alt. 762 m, 20.VII.2014, leg. Kaijian Teng, Wei Guan and Xiuchun Wang, genitalia slide no. FWX18058 . Paratypes: 1♀, same data as holotype except 18.VII.2014 ; 1♂, same data as holotype except 8.VIII.2016, leg. Kaijian Teng, Jiaen Li and Tao Wang ; 1♂, same data as holotype except 15.VII.2014, leg. Huilin Han ; 1♂, Sun River nature reserve (22°48’N, 100°58’E), Pu’er , Yunnan Province, alt. 1626 m, 7.VII.2013, leg. Shurong Liu, Yuqi Wang and Kaijian Teng ; 1♂, Ruili botanical garden (24°00’N, 97°50’E), Dehong , Yunnan Province, alt. 1166 m, 20.VIII.2015, leg. Jingxia Zhao and Hao Wei ; 1♂, Mt. Dayao (24°14’N, 110°13’E), Jinxiu, Guangxi Zhuangzu Autonomous Region , alt. 823 m, 18.VII.2015, leg. Mujie Qi and Shengnan Zhao ; 1♂, Mt. Nankun, Longmen County (23°73’N, 114°26’E), Guang- dong Province , 22.VIII.2010, leg. Jinmei Lv.

Diagnosis. Externally, Sycacantha camarata is similar to Phaecasiophora decolor Diakonoff, 1983 with the forewing pattern with transverse fasciae that extend from the basal part to the termen, but in this new species the fasciae are darker than those in P. decolor . The male genitalia of S. camarata resembles several congeners in the shape of valva in the male genitalia, such as S. amphimorpha Diakonoff, 1973 , S. complicitana ( Walker, 1863) , S. escharota ( Meyrick, 1910) , S. inopinata Diakonoff, 1973 , S. praeclara Diakonoff, 1973 , and S. tornophanes ( Meyrick, 1930) , but it can be distinguished by the base of socius that is strongly expanded backward; in the latter six species, the base of the socius is not expanded backward.

Description. Adult ( Figs. 2, 3 ). Head: Frons cream mixed with dark brown, vertex brown, mixed with cream and dark brown. Antenna pale brown, scape with inner side dark brown, lateral side cream-white. Labial palpus ascending, cream-white, outer side suffused with brown and dark brown; median segment not expanded; terminal segment blunt, pale gray.

Thorax: Collar, tegula and mesonotum brown, suffused with pale brown and dark brown; posterior crest indistinct. Hind tibia white, basally suffused with pale brown on outer side, with conspicuously enlarged tuft and two hair pencils in male, one white, the other pale gray, or gray. Forewing length 9.0–10.0 mm; subrectangular, costa arched, apex obtuse, termen straight; upperside ground color cream; most markings longitudinal, extending obliquely to termen, dark brown, suffused with brown, pale brown and yellowish brown; basal four pairs of costal strigulae pale gray or cream, distal five pairs cream or cream-white, an additional pair on midlength of media fascia, brown dusted carmine, leaden striae from costal strigulae distinct; basal fascia broken, indicated by a narrow longitudinal stripe extending from base of wing to midlength of lower edge of cell, and an indistinct inverted triangular patch between basal 1/3 and inner edge of wing; striae from strigulae one and two extending obliquely, protruding to midlength of lower edge of cell, then broadened and reaching 1A+2A between 1/4 length and midlength; Basal fascia scattered, with three narrow dark brown stripes, first extending along lower edge of cell to base of CuA 1, second extending along fold to midlength of CuA 2, third extending between fold and 1A+2A and confluent with second stripe distally, all three stripes interrupted medially by striae of strigulae one and two; striae from strigulae one and two extending obliquely to midlength of lower edge of cell, then to basal part of dorsum, curved to midlength of M 3, broadened, finally reaching tornus and surrounding a broken wedge-shaped blotch between CuA 1 and end of dorsum; subbasal fascia dark brown, slightly broader on costa and between 2/5 length of Sc and upper edge of cell, then a narrow stripe extending straight to termen on M 2, attached by a waved line of same color between M 2 and M 3, and followed by two short lines between ends of two adjacent veins from M 3 to CuA 2, sometimes confluent with the waved line; striae from strigulae three and four broad, extending outward to area between 3/4 length of R 5 and M 2; media fascia extending obliquely to M 1 on termen, upper part between costa and basal half of R 2, rhombic or elongate, dark brown, sometimes dusted with brown densely, lower part indicated by four dark brown lines between two adjacent veins from R 3 to M 2, areas between adjacent lines brown, gradually paled outward, being cream-white above M 2; striae from five to eight narrow, extending outward and confluent below costa, to end of M 1, then extending along termen, discontinuous, and reaching tornus.

Abdomen: Male genitalia ( Fig. 8 ) with tegumen narrow. Uncus shallow, cone-shaped. Socius with base expanded backward, with two rounded lobes; distal part short, deeply cleft, both parts more or less triangular and with dense spines apically, inner part broader than outer part. Gnathos a band, narrowed laterally. Valva slender; sacculus expanded indistinctly, densely covered with short spines distally, spines on neck sparse; cucullus gradually narrowed to apex, with basal part about twice as broad as apical part, projecting ventrally to a rounded prominence with a strong thorn apically. Phallus broad basally, gradually narrowed apically, apex about 1/2 as wide as basal part; cornuti a cluster of short spines. Female genitalia ( Fig. 14 ) with papillae anales narrow. Anterior and posterior apophyses slender, equal in length. Ostium broad. Ostium weakly sclerotized, somewhat rectangular, aciculate, posterior margin with a lateral angle-like process directed downwards. Ductus bursae equal to corpus bursae in length, granulate, gradually dilated anteriorly. Corpus bursae elongate oval, granulated anteriorly, without signa.

Etymology. The specific name is derived from the Latin camaratus (= arcaded), to note the shape of socius.

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).