Rhopaltriplasia rotundipetalina Yu and Li

Yu, Haili & Li, Houhun, 2005, First record of the genus Rhopaltriplasia Diakonoff from China, with description of two new species (Lepidoptera: Tortricidae: Olethreutinae), Zootaxa 1082, pp. 29-35 : 32-33

Rhopaltriplasia rotundipetalina Yu and Li , sp. n. ( Figs. 4, 5 )

Type material: Holotype: ɗ, CHINA: Mt. Wuyi (26°54' N, 116°42' E), Fujian Province, alt. 1000 m, 26.v.2004 (Haili Yu), genitalia slide no. YHL04514.

Diagnosis. This species is similar to both R. insignata Kuznetsov and R. spinalis sp. n., but can be distinguished from them by the bilobed and rounded uncus, the large socius, and the aedeagus without a basal prominence. In R. insignata Kuznetsov and R. spinalis the uncus is obviously bifurcate, the socius is relatively small, and the aedeagus has a basal finger­like prominence. Rhopaltriplasia rotundipetalina is also similar to R. macrorhis Diakonoff , but differs in having a shorter valva with a larger cucullus.

Description. Adult ( Fig. 4 ): Forewing length 7.0 mm. Head roughly scaled, yellowish brown. Antenna with scape yellowish fuscous, flagellum pale fuscous. Labial palpus porrect, median segment expanded ventrally, medially white, laterally pale fuscous in basal half, yellowish brown in apical half with fuscous apex, terminal segment half as long as median segment, slightly drooping, slender and pointed, pale yellow. Thorax fuscous. Legs white, with pale fuscous rings on tarsi; median tibia with sparse fuscous scales on lateral side. Forewing with upperside ground color pale yellowish brown, intermixed with dense pale ochreous scales; costa slightly arched, with nine pairs of pale yellow strigulae from base to R4, each pair of strigulae with a gray silvey stria extending obliquely; four pairs distributed between base of the wing and the point where Sc meets costa, the first and second pairs situated before 1/5 forewing length, with striae extending backward to base of dorsum, the third and fourth pairs between 1/3 and 2/5 forewing length, with striae extending backward to 1/3 forewing length of dorsum and distal margin protruding outward at middle; the fifth and sixth pairs between Sc and R1 points, striae from them extending obliquely to tornus, broken by fuscous spots; the distal three pairs distributed between pairs of veins R1–R2, R2–R3 and R3–R4, with striae from them confluent and extending to termen between R5 and M1; basal fascia fuscous, dusted with pale brown spots below base of R vein, distal margin indistinct; subbasal fascia fuscous suffused with pale ochreous, with proximal margin straight and distal margin medially protruding to center of cell; median fascia fuscous, narrow, extending from middle of costa across 3/5 length of discal cell to tornal angle, two times as broad on dorsum as on costa, distal edge coincident with outer edge of cell from midwing to dorsum; postmedian fascia fuscous, indistinct, distal margin with pale stria reaching tornus; terminal fascia small, fuscous; a fuscous line along termen between R5 and CuA1; tornus pale yellow; underside brown except the distal five pairs of strigulae pale yellow and area of hindwing overlap posterior to CuP white. Hindwing upperside grey, pale grey in costal region, cilia grey; underside paler than forewing underside.

Male genitalia ( Fig. 5 ): Uncus short, straight, erect, bilobed, apically rounded, naked. Socius broad, with apical 1/3 bent inward, setose. Gnathos large and broad, extending dorsally to base of uncus, joined at apical 1/3 and then separated to apex. Tegumen broad. Valva somewhat dumbbell­shaped, constricted strongly at 3/5 length, apically not exceeding uncus; basal half long­ovate, densely setose above basal cavity and along apical 3/4 of sacculus; cucullus large, covered with dense short setae, somewhat quadrate, with ventrolateral angle blunt, slightly concave at upper 2/5 of outer edge. Aedeagus broad at base, gradually narrowed to about middle, uniform in width in apical half; cornuti a sheaf of spines; caulis well­developed.

Female: Unknown.

Distribution. China (Fujian).

Etymology. This specific name is derived from the Latin prefix rotundi (= rounded) and petalinus (= petaline), referring to the shape of uncus.

Figures

FIGURES 4 – 5. Rhopaltriplasia rotundipetalina Yu et Li, sp. n. 4. adult; 5. male genitalia.