Eudarcia orbiculidomus ( Sakai & Saigusa,1999 )

Roh, Seung Jin & Byun, Bong-Kyu, 2019, The Meessiidae (Lepidoptera: Tineoidea) of Korea, Florida Entomologist 102 (1), pp. 65-75 : 68-71

Eudarcia orbiculidomus ( Sakai & Saigusa,1999)

( Figs.5 , 9, 10 , 17 , 21 , 25 )

Obesoceras orbiculidomus Sakai & Saigusa, 1999: 405–412 . Type locality: Japan.

Eudarcia orbiculidomus : Gaedike, 2000: 365; Xiao & Li, 2009: 308; Sakai, 2013: 124.

Adult ( Figs. 5 , 21 ). Wingspan 7.6 to 8.1 mm. Coloration and vestiture: Vertex of head roughly covered with light yellow hairs. Thoracic notum covered with yellowish scales. Upper side of forewing: ground color light yellow; blackish brown spots present widely. Hindwing covered with grey scales; post-marginal part present with long yellowish white hairs. Structure: head and compound eyes slightly small; ocelli absent. Maxillary palpus covered with light yellow scales, labial palpus drooping and covered with grayish scales. Antennae slightly thick and filiform, longer than 4/5 of the forewing. Forewing: slightly narrow, length/width (L/W) ratio 4.2, costa straight, termen very shortly arched to posterior margin, discal cell 0.66 times as long as forewing; venation ( Fig. 21 ): 7 separate and 2 forked veins originating at the discal cell; accessory and intercalary cell absent; Sc arising near 2/4 of the costa; Rs1 and Rs2 stalked and originating at half of the discal cell; Rs3 and Rs4 separate, Rs4 reaching to the apex; base of M weakly developed; M 1 and M 2 fused, M 1 + 2 and M 3 parallel; CuA 1 and CuA 2 originating at posterior margins of the discal cell, either separate and parallel; CuP slightly weak; basal part of 1A + 2A with loop. Hindwing: very narrow, L/W ratio 4.9, and costa straight; Sc + R straight to 1/2 of costa; Rs terminating at apex; base of M weakly developed; M 1 and M 2 fused, M 1 + 2 and M 3 originating at distal corner of posterior part of the discal cell; CuP absent; CuA 1 and CuA 2 stalked, 1A + 2A very weak; 3A present. Legs: epiphysis present; covered with light yellowish hairs. Abdomen: coremata of female present; corethrogyne of female absent.

Male genitalia ( Figs. 9, 10 ). Tegumen, vinculum, and uncus fused, uncus part deeply concave and bilobed; dorsal part of uncus present with some setae; gnathos fused with middle of dorsum part (tegument and uncus); vinculum slightly narrow; saccus 0.5 times as long as height of ring and highly slender; valva relatively broad and apex rounded, dorsal margin arched, ventral margin straight and parallel to dorsal margin (lateral view); transtilla narrow at costa of valva and well developed; phallus fairly thick and cylindrical, phallus longer than 1.2 times the height of the ring.

Female genitalia ( Fig. 17 ). Papillae anales slightly narrow with some short satae; apophyses posteriores very slender, apophyses posteriores 2.02 times longer than apophyses anteriores; apophyses anteriores relatively thick; antrum well developed; ductus bursae narrow and relatively short; corpus bursae slightly long.

Larval case ( Fig. 25 ). Length 5.0 mm. Larvae build their cases using small crustose lichen particles, forming wide oval-shaped cases.

MATERIAL EXAMINED

Two males and 4 females KOREA: Jeju Is., Chuja Is., 33.946011°N, 126.330552°E, collected 15-VII-2015, B.K. Byun, S.J. Roh, D.S. Kim , 2 male genitalia mounted on 80% glycerol solution, 1 female genitalia mounted on 60% euparal solution (genitalia no. KNAESJ00033 ), venation of wing slide no. KNAEVSJ9,DNA barcode Process ID KNAEM001-18 ( BOLD systems BIN. BOLD: ADJ8878 ) ( SEL / HNU) ; 2 males and 1 female KOREA: Chungcheongnam-do, Seosan-si , 36.711847°N, 126.547016°E, collected 1-V-2015 (larva), emerged 15 to 25-VI-2015, S.J. Roh, B.S. Jeon, D.S. Kim , 1 male mounted on 60% euparal solution (male genitalia no. KNAESJ00032 ) ( SEL / HNU) ; 3 females KOREA: Gangwon-do, Yeongwol-gun , 37.195550°N, 128.455027°E, collected 6-VI-2015 (larva), emerged 8-VI-2015, S.J Roh, J.H. Jeon, T.H. Yoo ( SEL / HNU) .

DISTRIBUTION

Korea (new record), Japan, China.

Figures

Figs.5-8. Adults:(5) Eudarcia orbiculidomus Sakai & Saigusa,male;(6) E.gwangneungensis sp.nov., female,paratype;(7) E.longiphalla sp. nov., female,paratype; (8) E. cornea sp. nov., female, paratype.

Figs. 9-16. Male genitalia:(9) Eudarcia orbiculidomus Sakai & Saigusa (genitalia no.KNAESJ00032),lateral view;(10) ditto, dorso-ventral view;(11) E. gwangneungensis sp. nov., holotype (genitalia no. KNAESJ00037),lateral view; (12) ditto,dorso-ventral view; (13) E. longiphalla sp. nov., holotype (genitalia no.KNAESJ00036), lateral view; (14) ditto, dorso-ventral view; (15) E. cornea sp. nov., paratype (genitalia no. KANES000J28),lateral view; (16) ditto, dorso-ventral view.

Figs. 17-20. Female genitalia: (17) Eudarcia orbiculidomus Sakai & Saigusa (genitalia no. KNAESJ00033); (18) E. gwangneungensis sp. nov., paratype (genitalia no. KNAESJ00035); (19) E. longiphalla sp. nov., paratype (genitalia no. KNAESJ00036); (20) E. cornea sp. nov., paratype (genitalia no. KANES000J29).

Figs. 21-24. Wing venation: (21) Eudarcia orbiculidomus Sakai & Saigusa (slide no. KNAEVSJ9); (22) E. gwangneungensis sp. nov., paratype (slide no. KNAEVSJ5); (23) E. longiphalla sp. nov., Holotype (slide no. KNAEVSJ6); (24) E. cornea sp. nov., paratype (slide no. KNAEVSJ8).

Figs. 25-29. Microhabitat and larval cases with pupal exuviae: (25) Eudarcia orbiculidomus Sakai & Saigusa, larval case with pupal exuviae; (26) E. gwangneungensis sp. nov., ditto; (27) Microhabitat of E. gwangneungensis sp. nov. (Korea, Gyeonggi-do, Pocheon-si, Gwangneung-forest, 20 Mar 2017); (28) ditto, close up; (29) ditto, scene of collection.