Eudarcia cornea Roh & Byun, 2019

Roh, Seung Jin & Byun, Bong-Kyu, 2019, The Meessiidae (Lepidoptera: Tineoidea) of Korea, Florida Entomologist 102 (1), pp. 65-75 : 74

Eudarcia cornea Roh & Byun , sp. nov. ( Figs. 8 , 15, 16 , 20 , 24 )

DIAGNOSIS

Eudarcia cornea sp. nov. is externally similar to E. gwangneungensis sp. nov. and E. longiphalla sp. nov., but it can be distinguished by wide dark brown scales on forewings. The male genitalia are similar to those of E. orbiculidomus Sakai & Saigusa, 1999 , but the uncus is markedly elongated, and valva is very wide and spinose. Furthermore, the male genitalia differ from E. dentata Gaedike, 2000 , and E. similidentata Xiao & Li, 2009 , by cornuti elongated to 2 spines on the apex of the phallus; vinculum broadly V-shaped. In addition, female E. cornea can be differentiated based on the wide eighth abdominal segment, elongated antrum, relatively thick ductus bursae, and well-developed ductus seminalis.

DESCRIPTION

Adult ( Figs. 8 , 24 ). Wingspan 6.3 to 7.1 mm. Coloration and vestiture: vertex of head roughly clothed with pale yellow hairs. Thoracic notum covered with dark brown scales.Forewing: ground color creamy white, widely covered with dark brown scales; short creamy-white hairs present on the termen. Hindwing covered with light brown scales and brown hairs present on the post-marginal part. Structure: head and compound eyes slightly large; ocelli absent. Mouthparts well developed, maxillary palpus and labial palpus covered with light brown scales, but black scales cover on 1 to 2 segments of maxillary palpus. Antennae filiform, covered with light brown scales. Forewing: slightly narrow, L/W ratio 4.38, costa straight, termen arched in the apex to posterior margin,discal cell 0.66 times as long as the forewings; 7 separate and forked veins absent in the discal cell ( Fig. 24 ); accessory and intercalary cell absent; Sc reaching to 2/5 of the costa; Rs3 and Rs4 stalked at anterior margin of distal corner of discal cell; Rs4 reaching apex; base of M weak; M 1 and M 2 fused; CuA 1 and CuA 2 originating at posterior margin of distal corner of discal cell; basal part of 1A + 2A looped. Hindwing short and narrow: L/W ratio 3.37; costa straight; Sc + R reaching to 3/5 of the costa; Rs terminating at 4/5 of the costa; base of M weak; M 1 and M 2 fused, M 1 + 2 reaching apex, M 1 + 2 and M 3 forked; CuP absent; CuA 1 and CuA 2 parallel, 1A + 2A slightly developed; 3A present, but weak. Legs covered with light brown hairs. Abdomen: covered with brown scales, corethrogyne absent.

Male genitalia ( Figs. 15, 16 ). Tegumen, vinculum, and uncus fused, slightly narrow; uncus short, elongated into 2 parts; vinculum broadly V-shaped; saccus short and narrowed downward, 0.79 times as long as the height of the ring; valva very wide, club-shaped (lateral view), costa of valva rounded in the apical part, spinose; transtilla short and hooked; phallus long and slender, longer than 2.32 times the height of the ring; cornuti elongated into 2 spines on the apex of the phallus.

Female genitalia ( Fig. 20 ). Ovipositor slightly long and narrow; papillae anales narrow, some short satae at the apical part; eighth abdominal segment wide; ostium bursa bell-shaped; apophyses posteriores thin and long, 3.6 times longer than apophyses anteriores, thick in the basal part; antrum elongated; ductus bursae slightly thick and short; corpus bursae wide and well sclerotized.

Larval case. Unknown.

TYPE MATERIAL

HOLOTYPE 1 male KOREA: Incheon, Ongjin-gun , Baengnyeong Is., 37.941388°N, 124.662247°E, collected 7-VII-2015, S.Y. Park, Y.M. Shin, J.W. Nam, male genitalia mounted on 80% glycerol solution (genitalia no. KNAESJ00027 ), DNA barcode Process ID KNAEM009-18 ( BOLD sys tems BIN. BOLD: ADL7356 ) ( KNAE).

PARATYPES 2 males and 3 females KOREA: Incheon, Ongjin-gun, Baengnyeong Is. , 37.941388°N, 124.662247°E, collected 7-VII-2015, S.Y.Park, Y.M. Shin, J.W. Nam , 1 male genitalia mounted on 60% euparal solution (genitalia no. KANES 000J28) , 2 females genitalia mounted on 60% euparal solution (genitalia no. KNAESJ00026 , KNAESJ00029 ), venation of wing slide no. KNAEVSJ8 , 2 males and 3 females DNA barcode Process ID KNAEM004-18 , KNAEM005-18 , KNAEM006-18 , KNAEM007-18 , KNAEM008-18 ( BOLD systems BIN. BOLD: ADL7356 ) ( KNAE) .

DISTRIBUTION

Korea.

ETYMOLOGY

The specific name is derived from the Latin word corneus (meaning “horn”), referring to the uncus part of male genitalia characters.

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).