Eudarcia gwangneungensis Roh & Byun, 2019

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

Eudarcia gwangneungensis Roh & Byun , sp. nov. ( Figs. 6 , 11, 12 , 18 , 22 , 26–29 )

DIAGNOSIS

Eudarcia gwangneungensis sp. nov. is externally similar to E. dentata Gaedike, 2000 and E. prolongata Xiao & Li, 2009 , but a wide light grey ground color of its forewings can be distinguished. The male genitalia of E. gwangneungensis are very similar to those of E. prolongata and E. dentate but the valva is very wide and the ampulla is relatively thick. Moreover, the male genitalia differ by very short saccus, cornuti is absent from the phallus, and transtilla is more slender and similar in shape to a sewing needle. Further, this species can be readily differentiated based on female genitalia; ductus bursae lacks spines and antrum is weakly developed.

DESCRIPTION

Adult ( Figs. 6 , 22 ). Wingspan 6.1 to 6.7 mm. Coloration and vestiture: vertex of head roughly covered with short, dark yellow hairs. Thoracic notum covered with dark brown scales. Forewing: ground color light grey and covered with dark brown scales, termen part present with short, light grey hairs. Hindwing covered with brown scales; post-marginal part present with long brownish hairs. Structure: head and compound eyes relatively small; ocelli absent. Mouthparts well developed: galea hooked with longer than 2/3 of labial palpus; maxillary palpus and labial palpus covered with light yellow scales; maxillary palpus 5 segmented; labial palpus 3 segmented. Antennae longer than 4/5 of the forewing with light brown scales, filiform, and with 42 flagellomeres. Forewing: slightly narrow, L/W ratio 3.6, costa straight, termen short and arched to posterior margin, discal cell 0.65 times as long as forewing; 7 separate veins and 1 forked vein originating at the discal cell ( Fig. 22 ); accessory and intercalary cell absent; Sc reaching to 2/5 of the costa; Rs1 and Rs2 fused; Rs3 and Rs4 originating at the anterior margin of distal corner of discal cell and forked at the base of 2/5 Rs3; Rs4 reaching near apex; base of M poorly developed; M 1 and M 2 fused, M 1 + 2 and M 3 parallel; CuA 1 and CuA 2 originating at posterior margin of the distal corner of the discal cell; CuP weak; basal part of 1A + 2A looped. Hindwing considerably narrow: L/W ratio 4.3; costa straight; Sc + R straight to 1/2 costa; Rs terminating at apex; base of M weakly developed; M 1 and M 2 fused, M 1 + 2 and M 3 stalked; CuP absent; CuA 1 and CuA 2 stalked, 1A + 2A slightly weak; 3A present. Legs: epiphysis present; covered with dark brown hairs. Abdomen: covered with brown scales, coremata of female present and corethrogyne absent.

Male genitalia ( Figs. 11, 12 ). Tegumen, vinculum, and uncus fused, uncus part triangular and considerably elongated; vinculum broadly Vshaped, slightly narrow; saccus very short, 0.34 times as long as the height of the ring; valva slightly broad and ampulla (apex of valva) rounded, harp very short and hooked (lateral view); transtilla considerably slender,straight at costa of valva and well developed; phallus short and thick, cylindrical, longer than 1.75 times the height of the ring.

Female genitalia ( Fig. 18 ). Ovipositor fairly long and narrow; papillae anales slightly narrow; ostium bursae located on anterior margin of sternum VIII, U-shaped; apophyses posteriores very slender, apophyses posteriores 3.3 times longer than apophyses anteriores, apophyses anteriores slightly thick and short; antrum short and weakly developed; ductus bursae narrow, slightly short; corpus bursae narrow and long, well sclerotized.

Larval case ( Figs. 26–29 ). Length 3.9 to 4.1 mm. Larvae build their cases by using small particles of crustose lichens and grains of sand attached on the rock, forming wide oval-shaped cases.

TYPE MATERIAL

HOLOTYPE: 1 male KOREA: Gyeonggi-do, Pocheon-si, Gwangneung-forest , 37.752619°N, 127.585850°E, collected (larva) 20-III-2017, S.J. Roh, Y.M. Shin, emerged (Adult) V-2017, genitalia mounted on 60% euparal solution (genitalia no. KNAESJ00037 ) ( KNAE).

PARATYPES: 1 male and 8 females KOREA: Gyeonggi-do, Pocheon-si, Gwangneung-forest , 37.752619°N, 127.585850°E, collected (larva) 20-III-2017, S.J. Roh, Y.M. Shin, emerged (Adult) V-2017 , 1 male whole body mounted on 60% euparal solution (slide no. SJWS001 , and genitalia no. KNAESJ00038 ) , 5 female genitalia mounted on 60% euparal solution (genitalia no. KNAESJ00011 KNAESJ00013 , KNAESJ00018 , KNAESJ00034 , and KNAESJ00035 ), venation of wing slide no. KNAE- VSJ5, DNA barcode Process ID KNAEM003-18 ( BOLD systems BIN.

BOLD: ADL 7237) ( KNAE).

DISTRIBUTION

Korea.

ETYMOLOGY

The specific name is derived from the type locality (Gwangneung forest) of the new species.

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.