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ISSN : 1225-0171(Print)
ISSN : 2287-545X(Online)
Korean Journal of Applied Entomology Vol.59 No.1 pp.1-4
DOI : https://doi.org/10.5656/KSAE.2019.11.0.046

A New Record of Saridoscelis sphenias Meyrick, 1894 (Lepidoptera, Yponomeutidae), the Second Species of Saridoscelinae, from Korea

Jae-Cheon Sohn*
Department of Science Education, Gongju National University of Education, Chungnam 32553, Korea
Corresponding author:jsohn74@gjue.ac.kr
October 2, 2019 November 8, 2019 December 1, 2019

Abstract


Saridoscelis sphenias Meyrick is reported for the first time from Korea. It represents the second species of Saridoscelinae in the country. The external appearance and male genitalia of S. sphenias are described and illustrated. Records of this species in Korea bring a concern as a pest species to domestic blueberry cultivations.



상제집나방아과의 두 번째 종인 Saridoscelis sphenias Meyrick, 1894의 국내 첫 기록

손 재천*
공주교육대학교 과학교육과

초록


국내 미기록종인 Saridoscelis sphenias Meyrick을 보고한다. 이 종은 상제집나방아과의 두번째 종으로 기록된다. 정확한 동정을 위해 외부 형 질과 수컷 생식기를 그림과 함께 기술한다. Saridoscelis sphenias Meyrick은 블루베리의 잠재 해충으로 국내 농가에 주의를 요한다.



    Saridoscelis is the type genus of Saridoscelinae and it currently includes four species occurring in temperate and tropical Asia (Lewis and Sohn, 2015). This genus exhibits three unique characteristics (Moriuti, 1977;Dugdale et al., 1998): the male sternum VIII configuration, the socii of the male genitalia with fringed sensilla, and the hindwing with all three M branches. All known hostplants of Saridoscelis belong to Ericaceae, suggesting a strong trophic fidelity. Significant economic damage by Saridoscelis is rare but S. sphenias Meyrick has been regarded as a pest species in blueberry cultivation (Yu et al., 2012).

    Sohn and Choi (2016) reported Saridoscelis kodamai Moriuti from Korea. This was the first record of Saridoscelinae from the country. In their report, its occurrence status was pending due to the lack of evidence. In the present study, the second Korean species of Saridoscelinae and Saridoscelis is reported with photos of external and male genital features.

    Material and methods

    Specimens were obtained from the collection of the Department of Science Education, Gongju National University of Education (GNUE). The type specimen of Saridoscelis sphenias was photographed from the Natural History Museum, London, UK (NHMUK).

    Genitalia slides of specimens were prepared following Clarke (1941), except that Chlorazol black and Euparal resin were used for staining and permanent mounting, respectively. Terms for genitalia follow Klots (1970). The ‘GSN’ in the specimen data stands for ‘genitalia slide number.’

    Taxonomic accounts

    Family Yponomeutidae 집나방과

    Subfamily Saridoscelinae Moriuti 1977 상제집나방아과

    Genus SaridoscelisMeyrick, 1894

    SaridoscelisMeyrick, 1894: 28. Type species: Saridoscelis spheniasMeyrick, 1894.

    This genus is characterized by a unique modification of the male 8th abdominal sternite (Kyrki, 1990). The adults of Saridoscelis are mostly whitish moths with dark brown, straight streaks on the forewing. In all known cases, the larvae are associated with three genera of Ericaceae: Leucothoe, Pieris, and Vaccinium.

    Saridoscelis spheniasMeyrick, 1894 작은상제집나방 (Figs. 1, 2)

    Saridoscelis spheniasMeyrick, 1894: 28. Type locality: Myanmar, Koni.

    Saridoscelis issikiiMoriuti, 1961: 66. Type locality: Japan, Honshu, Hyogo Pref., Nisinomiya.

    Description. Head - Vertex and frons white. Labial palpus slender, white; 2nd segment tinged with dark grayish brown on outer surface. Antenna white, 6/7 as long as forewing. Thorax - Tegula white, intermixed with pale grayish brown scales medially; mesonotum pale grayish brown, tinged with white anteriorly and laterally. Forewing length 5-5.5 mm, pale grayish brown, intermixed with white scales, white horizontally along middle; costa dark brown on basal 1/6, accompanied with three oblique, dark grayish brown streaks on distal 1/3; dorsal patch oblique, broadened to dorsum, dark grayish brown; subterminal line straight, oblique, broadened to tornus, dark grayish brown; cilia dark grayish brown. Hindwing and cilia dark grayish brown. Eight abdominal sternite (Fig. 2B) triangular, deeply-emarginated medially on basal margin, with Tshaped arm apically, Male genitalia (Fig. 2A) - Uncus elongate, bifid; socius long, slender in basal 2/3, digitate in distal 1/3, with a bundle of spiniform setae apically. Tegumen trapezoidal in distal half, rectangular in basal half; gnathal arm conical, dentate, with subtriangular plate below. Valva elongate, sparsely setose; costa curved, bulged on distal 1/3; saccular plate as long as basal 2/5 of valva, with conical bulge apically. Saccus slender, 2x longer than socius, elongate-triangular basally, dilated in distal 1/4. Phallus (Fig. 2C) slender, nearly straight; apex with curved carina; cornuti present as fine spinules. Female not found in this study, described in Moriuti (1977).

    Material examined. 1♂, Jeonnam Prov., Jindo-gun, Gogun- myeon, Mt. Cheomchalsan, near Mosa Village, pine tree forest (34°28'00.8"N, 126°21'41.7"E), 29 August 2016 (JC Sohn), genitalia slide no. SJC-1074; 1♂, Jeonnam Prov., Wando-gun, Is. Wando, Wando-eup (34°17'53.1"N, 126°42'46.8"E), 24 August 2017 (JC Sohn).

    Distribution. Korea (new record), Japan, Taiwan, India.

    Host plants. Ericaceae - Vaccinium bracteatum Thunberg (Moriuti, 1961).

    Remarks. The type specimen of Saridoscelis sphenias is illustrated in this study (Figs. 1B and C). This species seems to be a resident or recently-established species in Korea. Its distribution within the country appears limited to the southwestern parts. Given the pest status of Saridoscelis sphenias in the neighboring countries, its occurrence in Korea may pose a threat to domestic blueberry cultivation. This species seems to be on flight in August, but it is known to be bivoltine in Japan (Moriuti, 1977).

    Statements for Authorship Position & contribution

    Sohn, J.C. : Gongju National University of Education, Professor; performed overall procedures of research and wrote the manuscript

    All authors read and approved the manuscript

    KSAE-59-1-1_F1.gif

    Adults of Saridoscelis sphenias Meyrick. A: male, Jindo-gun, Korea; B: holotype labels; C: holotype, female. Scale bars: 3 mm.

    KSAE-59-1-1_F2.gif

    Eighth sternite and male genitalia of Saridoscelis sphenias Meyrick. A: genital capsule; B: eighth sternite; C: phallus.

    Reference

    1. Clarke, J.F.C. ,1941. The preparation of slides of the genitalia of Lepidoptera. Bulletin of the Brooklyn Entomological Society 36, 149-161.
    2. Dugdale, J.S. , Kristensen, N. P. , Robinson, G. S. , Scoble, M. J. ,1998. The Yponomeutidae. in: Kristensen, N. P. (Ed.) Lepidoptera, Moths and Butterflies. Vol. 1: Evolution, Systematics, and Biogeography. Handbook of Zoology 4, 119-130.
    3. Klot, A.B. ,1970. Lepidoptera. in: Tuxen, S. L. (Ed.) Taxonomist’s Glossary of Genitalia in Insects. Munksgaard. Danmark, pp. 115-130.
    4. Kyrki, J. ,1990. Tentative reclassification of Holarctic Yponomeutoidea (Lepidoptera). Nota lepid. 13, 28-42.
    5. Lewis, J.A. , Sohn, J.-C. ,2015. Lepidoptera: Yponomeutoidea I (Argyresthiidae, Attevidae, Praydidae, Scythropiidae, and Yponomeutidae). in: Landry, B. (Ed.) World Catalogue of Insects, Vol. 12. Brill, Leiden/Boston. 253 pp.
    6. Meyrick, E. ,1894. On a collection of lepidoptera from upper burma. transactions of the entomological society of london for the year 1894(1), 1-29.
    7. Moriuti, S. ,1961. Japanese species of Saridoscelis Meyrick. Transactions of the Lepidopterological Society of Japan (Tyō to Ga) 11, 64-69.
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