Meganola triangulalis ( Leech, 1888 )

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 : 220-221

Meganola triangulalis ( Leech, 1888)

( Figs 4 , 16 , 27 )

Nola triangulalis Leech, 1888: 608–609 . TL: Japan (Satsuma, Kagoshima Pref.).

Roeselia triangulalis: Hampson, 1900: 57 ; Matsumura, 1930: 94; Choi, 2011: 274–276.

Meganola triangulalis: Inoue, 1982: 666 ; Oh, 1991: 85–87 [unpublished]; Sasaki, 2011: 180.

Diagnosis. This species is similar to M. protogigas ( Inoue, 1970) but can be distinguished from it by following characters: forewing ground color bright gray to fuscous gray, black median triangular patch on costal line, medial line in zigzag; male genitalia with tegumen not tumescent at basal area; valva expanded distally, not excurved; harpe spine-shaped on median area of valva; sacculus developed; aedeagus with long rod-shaped cornutus; female genitalia with 8 th segment sclerotized U-shaped with pointed apex; ostium bursae sclerotized, stout; ductus bursae rather sclerotized; corpus bursae small than other species, and two signa present, anterior signum twice length than posterior.

Redescription. Adult ( Figs 4a, b ). Wingspan 18 – 30 mm in both sexes. Head and thorax gray in male, bright gray in female. Ground color of forewing bright gray, with black basal patch in costal margin; black triangular patch in two-thirds medial area; black medial line in zigzag; postmedial line curved inwardly; black subterminal line waved; cilia gray, mixed with dark brown scales. Ground color of hindwing bright gray; cilia pale brown, in female ground color brighter than male. Male genitalia ( Fig 16 ). Pseudouncus tapering, weakly covered with setae. Tegumen triangular, tumescent from below. Valva elongated rectangular, weakly curved inwardly, with blunt apex; costal margin of valva sclerotized. Harpe minute dentate dosally, finger-shaped. Saccus U-shaped.Aedeagus weakly sclerotized, pointed apex, without cornutus. Female genitalia ( Fig 27 ). Apophyses posteriores almost same length as anteriores. Ostium bursae tubular, weakly sclerotized. Ductus bursae membranous, right angle at ostium bursae. Corpus bursae ovoid, with two spinous signa, one of them located posterior of corpus bursae, another one opposite anterior; appendix bursae present.

Material examined. (2♂, 2♀) 1♀, JJ, Yongdu-gol , Topyung, 5.VII. 1986 (K.T. Park), Gen. Slide No. SH-67 (slide lost); [MNU] 1♂, JJ, Seoguipo , Namwon, Silye, Mt. Halla-san, N 33˚19′56.7′′, E126˚36′25.7′′, 499 m, 11 Jun 2009 ; 1♂, JJ, Seoguipo , Namwon, Harye, Mt. Halla-san, N 33˚18′56.8′′, E126˚37′09.4′′, 264m, 4 May 2010; [KNA] 1♀, JJ, Bomokdong , Seogwipo (33˚14′31.91″N 126˚36′9.43″E), 29. V. 2013 (B.W. Lee) Gen. Slide No. INU-9182 .

Distribution. Korea (JJ), Japan, China, Taiwan, Thailand, India (Assam, Sikkim), Borneo.

Hostplants. Japan: Castanopsis sieboldii (Fagaceae) , ( Sasaki et al. 2011).

Remarks. This species first recorded from Korea by Kononenko and Han (2007), based on Dr. Oh’s doctoral thesis. The male adult and genitalia photographs were provided by Choi (2011).

Figures

FIGURES 1–4. Adults of genus Meganola spp. 1a. Meganola gigas, male (INU-9121). 1b. ditto, female (INU-9122). 2. Meganola protogigas, male (photos by Choi 2006)). 3a. Meganola subgigas, male (INU-9040). 3b. ditto, female (INU-9122). 4a. Meganola triangulalis, male (photos by Choi (2006)). 4b. ditto, female (SH-67). (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 26–27. Female genitalia of Meganola spp. 26. Meganola subgigas (INU-9122). 27. Meganola triangulalis (INU- 9182). (Scale bar = 1mm)