Dryadaula koreana Roh & Byun, 2020

Roh, Seung Jin, Shin, Young-Min, Lee, Dong-Jun & Byun, Bong-Kyu, 2020, The first record of Dryadaulidae (Lepidoptera, Tineoidea) from Korea with the description of a new species, Dryadaula koreana sp. nov., Nota Lepidopterologica 43, pp. 221-225 : 221

Dryadaula koreana Roh & Byun sp. nov.

Material examined.

Holotype: South Korea · ♂; Jeollanam-do, Yeosu, Is. Dolsan; 34°36'N, 127°43'E; 14 June 2017; J.O. Lim, S.B. Choi, S.G. Lee, S.J. Roh leg.; genitalia No. SJ00065.

Paratypes: South Korea · 1 ♂; Incheon, Is. Baekryeong; 37°56'N, 124°41'E; 8 July 2015; S.Y. Park, Y.M. Shin, J.W. Nam leg.; genitalia No. SJ00064 · 1 ♂; Incheon, Is. Muyi; 37°24'N, 124°24'E; 9 July 2002; Kim, Lee, Song, Kim leg.; genitalia No. SJ00061 · 1 ♀; Gangwon-do, Chuncheon; 31 July 1983; K.T. Park leg.; genitalia No. SJ00060.

Diagnosis.

Dryadaula koreana sp. nov. is externally similar to D. epischista (Meyrick, 1936), but can be distinguished by the uncus of the male genitalia being elongate and slightly curved at its tip, and the right valva being rather wide, and in having three projections on the left valva. In addition, the apex of the phallus is strongly bifurcate.

Description.

Adult (Figs 1 , 2 ). Head: small, vertex densely covered with yellow hairs; labial palpus short with yellow scales; antennae filiform, irregularly alternating dark brown and yellowish white. Thorax covered with yellowish brown scales. Legs with femora, tibiae, and tarsi covered in light yellow hairs; tarsi irregularly covered in shiny brown scales. Wingspan 6.3-7.8 mm. Forewing costa straight, gently curved beyond apex, termen short and arched to posterior margin, ground colour yellowish brown, dark brown patterned. Forewing venation (Fig. 3 ) length-to-width ratio of 3.74; with 10 separate veins originating at discal cell; accessory and intercalary cells absent; Sc terminating at 0.4 × length of costa; M1 arising at mid-part of Rs4, reaching apex; CuP very weak, at 4/5 of costa. Hindwing costa relatively straight, apex slightly curved to termen, covered with dark brown scales; fringes long, dark brown. Hindwing venation (Fig. 3 ) length-to-width ratio of 5.84, all veins very weak except Sc, CuA1, and CuA2; Sc terminating at basal part of costa. Abdomen covered with dark brown scales, oviscapt covered in yellowish brown scales. Male genitalia (Fig. 4 ) asymmetrical. Uncus (Fig. 4b ) elongate and somewhat curved to tip; tegumen twisted to the left and somewhat broad, fused with vinculum; gnathos absent; right and left valva clearly asymmetrical, right valva (Fig. 4d ) broad and digitate, apical part densely covered with relatively long setae, left valva (Fig. 4a ) more slender than right valva and with three projections, lobate process near apical part bearing spinose setae on dorsal surface; vinculum slender; saccus blunt; juxta irregularly square and connected to left valva; phallus (Fig. 4c ) strongly bifurcate at apex, tip pointed. Female genitalia (Fig. 5 ); sternite VIII near ostium densely covered with bristles and strongly sclerotised on right side; papillae anales (Fig. 5a ) relatively slender, apical part concave with short setae; apophyses posteriores very short; ductus bursae and corpus bursae unclear.

Etymology.

The species name is derived from the type locality in Korea.

Figures

Figures 1 - 3. Adults and wing venation. 1. Male; 2. Female; 3. Wing venation.

Figures 4, 5. Genitalia. 4. Male (a, left valva; b, dorsal part and sternite VIII; c, phallus; d, right valva); 5. Female, 5 a. papillae anales