Meganola costalis ( Staudinger, 1887 )

Cha, Yeong-Bin, Oh, Sung-Hwan, Bayarsaikhan, Ulziijargal, Na, Sol-Moon, Lee, Dong-June, Ko, Jae-Ho, Lee, Tak-Gi, Kim, Hyeong-Kyu, Jang, Chang-Moon & Bae, Yang-Seop, 2019, Review of the genus Meganola Dyar, 1898 (Lepidoptera: Nolidae, Nolinae) from Korea, with the description of a new species, Zootaxa 4686 (2), pp. 215-240 : 221-222

Meganola costalis ( Staudinger, 1887)

( Figs 6 , 18 , 29 )

Nola costalis Staudinger, 1887: 179–180 . TL: Russia (Amur, Ussuri, Askold).

Roeselia melanocosta Inoue, 1961: 683 .

Roeselia costalis: Hampson, 1900: 68 ; Choi, 2006: 187–188.

Rhynchopalpus costalis: Tshistjakov, 2008: 14–15 .

Meganola costalis: Inoue, 1982: 666 ; Oh, 1991: 75–77 [unpublished]; Sohn, 2005: 84–85; Sasaki, 2011: 179.

Diagnosis. This species is similar to M. strigulosa ( Staudinger, 1887) but can be distinguished from it by the following characters: forewing ground color gray; dark brown basal and costal patch; dark brown medial and postmedial lines waved in outer line near costa; male genitalia with pseudouncus tumescent at middle part; harpe short, bowlshaped, without dentation. saccus almost half-length of valva; aedeagus sclerotized, slender, with a cornutus; female genitalia with ostium bursae sclerotized, curved; ductus bursae membranous, curved, half-length of ostium bursae; corpus bursae ovoid, with two triangular signa, posterior signum two-thirds length than anterior.

Redescription. Adult ( Figs 6 ). Wingspan 15–20 mm in both sexes. Head and thorax gray in both sexes. Ground color of forewing pale gray in both sexes, with dark brown basal patch in half of costal margin; dark brown antemedial line waved in inner line near dorsal; dark brown medial and postmedial lines waved in outer line near costa; brown subterminal line waved; cilia gray, mixed with white scales. Ground color of hindwing dark brown; cilia dark brown in both sexes. Male genitalia ( Fig 18 ). Pseudouncus tapering, tumescent at median, apical pointed, weakly covered with setae, subscaphium present. Tegumen triangular, tumescent from below. Valva broadly to the apex; costal margin of valva sclerotized, slightly curved inwardly. Harpe short, bowl-shaped. Saccus short and V-shaped. Aedeagus slender, with a cornutus. Female genitalia ( Fig 29 ). Apophyses posteriores 1.5 times longer than anteriores. Ostium bursae sclerotized, curved. Ductus bursae partly sclerotized, curved, membranous near corpus bursae, twice length than ostium bursae. Corpus bursae ovoid, with two triangular signa, posterior signum two-thirds length than anterior.

Material examined. (1♂, 1♀) 1♂, GW, Temp. Baekdamsa , Injae, 9. VII. 2003 (Y.S. Bae, B.W. Lee, Y.G. Kim and Y.J. Song), Gen. Slide No. INU-9124; [Heo] 1♀, JN, Mt. Cheongwan-san , Jangheong, 26. V. 2018 (U. H. Heo), ex Pourthiaea villosa , emerged 15. VI. 2018, Gen. Slide No. INU-9154 .

Distribution. Korea (GW, JN), Japan, China (Northeast), Russia (Far East).

Hostplants. Korea: Pourthiaea villosa new record ( Rosaceae ). Malus baccata (Rosaceae) , ( Heo, 2016). Japan: Prunus incisa (Rosaceae) , ( Inoue, 1982). Genus malus spp., Sorbus spp. ( Rosaceae ), (Sugi, 1987).

Remarks. Sohn (2005) first reported this species from Jindo Island, Korea, based on two females. Male specimen was first recorded from Korea by Kononenko and Han (2007), based on Dr. Oh’s doctoral thesis.

Figures

FIGURES 5–8. Adults of genus Meganola spp. 5a. Meganola albula, male (INU-9126). 5b. ditto, female (INU-9125). 6a. Meganola costalis, male (INU-9124). 6b. ditto, female (INU-9154). 7. Meganola shimekii, female (INU-9018). 8a. M. mikabo, male (INU-9100). 8b. ditto, female (INU-9098). (Scale bar = 1cm)

FIGURES 16–18. Male genitalia of Meganola spp. (a: male genitalia, b: aedeagus, c: enlarged uncus, d: enlarged harpe). 16. Meganola triangulalis (photos by Choi (2006)). 17. Meganola albula (INU-9126). 18. Meganola costalis (INU-9124). (Scale bar = 1mm)

FIGURES 28–29. Female genitalia of Meganola spp. 28. Meganola albula (INU-9125). 29. Meganola costalis (SH-95). (Scale bar = 1mm)