Nycteola coreana (Leech, 1900)

Cha, Yeong-Bin, Heo, Un-Hong, Bayarsaikhan, Ulziijargal, Kim, Sora & Bae, Yang-Seop, 2023, Taxonomic review of the genus Nycteola Huebner (Lepidoptera, Nolidae) from Korea including potential invasive pests, Biodiversity Data Journal 11, pp. 114878-114878 : 114878

Nycteola coreana (Leech, 1900)

Sarrothripus coreana Leech, 1900 - Leech 1900: 518. Type locality: Korea: Gensan. Holotype: male, in coll. NHMUK.

Nycteola costalis Sugi, 1959 - Sugi 1959: 278. Type locality: Japan: Tokyo: Takao-san.

Nycteola costalis : Poole, 1989 - Poole 1989: 704; Sohn et al. (2005): 220; Paek et al. 2010: 304; Kim et al. (2016): 141; National Institute of Biological Resources 2019: 605.

Nycteola coreana : Pak, 1959 - Pak (1959): 38; Kim et al. 1982: 415; Poole 1989: 704; ESK and KSAE 1994: 374; Kononenko and Han (2007): 72; Paek et al. 2010: 304; Kim et al. (2016): 141; National Institute of Biological Resources 2019: 605; Park and Lee 2021: 615.

Materials

Type status: Other material. Occurrence: catalogNumber: INU-12096 ; recordedBy: Lee, Kim & Song; individualCount: 1; sex: 1 male; occurrenceID: BE5B9666-A3C2-5C63-BC7E-F02CDC5D5386; Taxon : class: Insecta ; order: Lepidoptera ; family: Nolidae ; genus: Nycteola ; specificEpithet: coreana; taxonRank: species; Location : country: Korea; stateProvince: JJ; locality: Seongpanak , Jeju-si ; Identification : identifiedBy: Y.B. Cha; dateIdentified: 2022; Event : eventDate: 26-07-2003; Record Level : language: en; collectionCode: Insects; basisOfRecord: PreservedSpecimen Type status: Other material. Occurrence: catalogNumber: INU-11953 ; recordedBy: Bae Y.S., Park B.S., Na S.M. Lee D.J.; individualCount: 1; sex: 1 female; occurrenceID: 4A0FB28B-DF31-529C-BB9A-785FC1683202; Taxon: class: Insecta; order: Lepidoptera ; family: Nolidae ; genus: Nycteola ; specificEpithet: coreana; taxonRank: species; Location : country: Japan; stateProvince: Nagasaki; locality: Ayumodoshi (1), Tsushima ; verbatimCoordinates: 34°09'12.96"N 129°12'58.48"E; Identification : identifiedBy: Y.B. Cha; dateIdentified: 2022; Event : eventDate: 22-06-2015; Record Level: language: en; collectionCode: Insects; basisOfRecord: PreservedSpecimen

Description

Adults. (Fig. 1 c, d) Length of forewing 9 mm in male, 11 mm in female, wingspan 20-24 mm ( Sohn et al. 2005). Antenna filiform in both sexes. Head and thorax grey. Ground colour of forewing grey; longitudinal basal fascia black; black medial line undulate, wavy; medial fascia black, triangular; a blackish streak under medial fascia; postmedial line undulate, wavy; subterminal line somewhat indistinct, undulate, wavy. Ground colour of hindwing dark grey. Abdomen grey.

Male genitalia. (Fig. 2 b, d, f) Uncus stout, rounded end, with subscaphium. Tegumen narrow, broadened basally. Valva triangular; costal margin almost straight with a bent spinous process; apex lobe hairy, supported by harpe-like process towards apex; tornal lobe hairy; ventral margin somewhat wavier than costal margin. Saccular shield anchor-shaped, partly fused to aedeagus. Vinculum rectangular. Aedeagus long, slender, with a double-bladed saw-shaped cornutus. Eighth tergite costally horizontal wing-shaped plate with two long clavate processes anteriorly; postero-laterally weakly sclerotised, with a membranous pouch posteriorly; 8th sternite with butterfly-shaped plate.

Female genitalia. (Fig. 3 b) Apophyses anteriores somewhat longer than apophyses posterior. Ostium bursae membranous, narrow to ductus bursae. Ductus bursae membranous, with weakly sclerotised area in 1/3 from posterior; appendix bursae based on 2/3 of ductus bursae. Corpus bursae ovate.

Diagnosis

This species can be distinguished from other congeners by its a conspicuous triangular black costal patch with a tornal black dot on the forewing in the adult. In the male genitalia, only the Nycteola coreana has a significantly slender aedeagus with a saw-shaped cornutus and a row of cornuti fields. In the female genitalia, its noticeable appendix bursae at ductus bursae can identify it from others.

Distribution

Korea, Japan ( Sasaki and Kishida 2011).

Ecology

Host plant: Quercus spp., Q. acuta, Q. glauca ( Fagaceae ) ( Yamamoto and Sugi 1987, Sohn et al. 2005, Heo 2021).

Notes

This species was firstly recorded from the Korean Peninsula by Leech (1900). Sohn et al. (2005) recorded N. costalis Sugi from Wando Is. from South Korea, but it was synonymised by Kononenko and Han (2007) as N. coreana . According to our findings in this study, while Poole (1989) was the first to describe N. coreana as a new combination from Sarrothripus to Nycteola , an earlier combination was discovered in the bibliography of Pak (1959).