A new species of the genus Phyllonorycter Hübner, 1822 (Lepidoptera: Gracillaridae) from Korea Author Sohn, J. - C. text Far Eastern Entomologist 2024 2024-03-31 496 12 15 http://dx.doi.org/10.25221/fee.496.3 journal article 10.25221/fee.496.3 2713-2196 10928390 955984FA-9C17-42C6-BC43-35F7457D77BA Phyllonorycter wolaksana sp. n. https://zoobank.org/NomenclaturalActs/ 680792DD-3718-418E-839B-FD8A8615F06F Figs 1–4 TYPES . Holotype : male, Korea : “ KOREA Chungbuk Prov. | Jecheon , Mt. Wolak-san | N36°51′56.0″ E128°05′20.0″ E Alt. 222m | 15-18 June 2007 coll. J.C. Sohn ”, dissected genitalia in capsule, GJUE . Paratypes : 4♂ , 1♀ , Korea : Chungbuk Prov. , Jecheon , Mt . Wolaksan ( 36°51′56.0″N 128°05′20.0″E , alt. 222 m ), 15-18 June 2007 ( JC Sohn ), [ GSN ] SJC-1351( ♂ ), 1352( ♀ ), 1484 ( ♂ ), [ COI ] JCS-23-014”, GJUE & NIBR . DIAGNOSIS. This species is similar to a European congener, P. coryli (Nicelli, 1851) in the male genitalia but differs from the latter in having the asymmetrical valvae and the lingui- form eighth sternite. DESCRIPTION. HABITUS ( Figs 1, 2 ). Head : Vertex lustrous, pale gray; frons lustrous, white. Antenna 2/3 as long as forewing, filiform in both sexes; scape white, tinged with gray dorsally; flagellomere pale gray, tinged with pale grayish-brown distally. Labial palpus lustrous, white; 2nd segment 1.5x longer than 1st; 3rd segment 2.5x longer than 2nd, acuminate apically. Thorax : Patagium white; tegula pale brown, tinged with white distally; mesonotum pale grayish-brown, with white streak laterally and medially. Forewing ( Fig. 2 ) length 3.1–3.5 mm, pale grayish-brown; costal streak white, curved on median area; medio-basal streak narrow, white; hind-basal streak white, inclined on median area; three white costal strigulae on apical area and one tornal patch crescentiform, white, juxtaposed with dark grayish-brown streak marginally; apical area with black streak medially; cilia fuscous above apex and on tornus, white below apex. Hindwing narrow, grayish-brown; cilia fuscous. Foreleg with coxa grayish-brown; femur and tibia grayish-brown dorsally, white ventrally; tarsus grayishbrown, with white ring basally. Midleg with coxa white; femur white, tinged with pale grayish-brown distally; tibia white, with grayish-brown band on distal 1/3 of dorsum; tarsus white, with dark grayish-brown patch dorsodistally. Hindleg with coxa, femur and tibia lustrous, pale gray; tarsus white, with grayish-brown patch dorsodistally. Abdomen : dorsal side pale grayish-brown; ventral side white, tinged with pale orange ventrobasally. Figs 1–4. Phyllonorycter wolaksana sp. n. 1 – adult, holotype, male (scale bar = 2 mm); 2 – magnified wings of holotype ; 3 – male genitalia, paratype (SJC-1484); 4 – female genitalia, paratype (SJC-1352). MALE GENITALIA ( Fig. 3 ). Tegumen symmetrical, subtriangular apically; anellus as long as tegumen, narrowed distally. Left valva broadly round costally, nearly straight on saccular margin, round apically, with spiniform setae subcostally on distal 2/3 and a long spiniform seta at middle of saccular margin; right valva similar to left valva, but narrower and with shorter saccular seta. Vinculum subtriangular. Flap-like eighth sternite tongue- shaped, scobinate and setose along submargins. Aedeagus slightly curved, narrowed to apex, with elongate rim basally and a hook-like projection subapically. FEMALE GENITALIA ( Fig. 4 ). Papillae anales band-like, setose. Apophyses posteriores as long as apophyses anteriores. Ostium bursae broad, with pouch-like emargination at the connection with ductus bursae. Most of ductus bursae and entire corpus bursae lost in the specimen. ETYMOLOGY. The species epithet is derived from the type locality, Mt. Wolaksan.