Nabangana, Byun, 2020

Byun, Bong-Kyu, 2020, First report of the tribe Chlidanotini (Lepidoptera: Tortricidae) from Korea, with the description of a new genus and species, Zootaxa 4845 (2), pp. 283-287 : 284

Genus Nabangana gen. nov.

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Type species: Nabangana koreana sp. nov.

Diagnosis. The new genus is somewhat similar in appearance to members of the tribe Enarmoniini , but it can be easily distinguished by the concaved termen beneath the apex in the forewing, the presence of hami and a subtriangular lobe on the valva in male genitalia, and a signum bearing numerous long spines in female genitalia. Also, the new genus is similar to the related genera, Trymalitis Meyrick, 1905 , Caenognosis Walsingharn, 1900 , Leurogyia Common, 1965 , and Daulocnema Common, 1965 , but it is different from them by the wing venation as written in the Discussion. The male genitalia ( Figs 5, 5a ) are similar to those of Leurogyia peristictum Common, 1965 , but can be distinguished by the rather narrow uncus, with sub-acute apex; the stick-shaped hami with broadened apex; the rather rounded valva, curved at middle of ventral margin with a subtriangular lobe medially. Aedeagus nearly straight with bifid apex, cornuti absent. The female genitalia ( Fig. 6 ) are in general similar to those of allied genera, but are characteristic especially by the sclerotized ductus bursae near the entrance, and the signum with a bundle of spines, and the accessory sac originating from the head of the signum.

Description. Head ( Figs. 2–3 ). Frons with short, whitish, rough scale tufts; rough yellowish brown scales around compound eye, base of antenna, and vertex; proboscis short; labial palpus somewhat subtriangular in frontal view, rather broadened downwards with long scales, apical segment narrowed, slightly porrect, subacute, with appressed short scales; ocelli absent; cilia of the antennae not developed.

Thorax: Legs with smooth scales. Forewing ( Figs 1, 4 ) narrow, elongate, costa gently arched basally, then nearly straight toward apex, apex narrowed and strongly produced, apex subacute, termen deeply concaved beneath apex, tornus somewhat broadly rounded. Forewing venation with Sc extending to near middle of the costa, R 1 from 2/3 length of the cell, R 3 from upper-right angle of the cell, R 4 and R 5 long stalked extending to near apex and the end of apex respectively, M 1 long to the termen beneath apex, M 2 straight to the concavity of the termen, M 3 and CuA 1 connate near the lower angle of the cell, CuA 1 strongly curved in middle and approaching M 3 near margin of termen, CuA 2 originated from beyond the half of the cell, more or less straight, 1A+2A with basal fork, extending to 1/3 of dorsum. Hindwing ( Figs 1, 4 ) slightly narrower than forewing, slightly acute apically, Sc fused with discal cell to beyond one-half, Rs and M 1 nearly coincident from upper angle of cell, then branched near apex, stem of M absent from cell, M 2 originating from the lower 1/3 of the outer margin of the discal cell, M 3 and CuA 1 long-stalked, CuA 2 from about 2/3 of cell, CuB vestigial, 1A+2A with basal fork, 3A vestigial.

Abdomen: hair pencil not observed.

Male genitalia ( Figs 5, 5a ). Tegumen broad; uncus broad basally, then narrow from middle towards apex, with two hami, the modification of the uncus, thick, with broadened apex, as long as 2/3 of uncus, socii clavate, hairy, rounded terminally; gnathos arms short, united medially, sub-acute terminally; transtilla broad, weakly sclerotized; juxta narrow at base, vinculum broad, rounded; valva internally strongly concave, distally broadly rounded, with long hairs along the terminal margin, a sub-triangular lobe with acute apex present medially; aedeagus as long as the height of the genitalia, nearly straight, bifid apically, cornutus absent.

Female genitalia ( Fig. 6 ). Papillae anales long, elongate, rounded posteriorly; ostium bursae broad, cup-shaped, well sclerotized; ductus bursae broad, as long as corpus bursae, sclerotized near entrance, then membranous towards corpus bursae; corpus bursae ovate, signum near junction of ductus bursae, a deeply invaginated sclerotized structure basally, with two series of appressed spines terminally, neck of accessory sac short, originating from the signum posteriorly.

Distribution. The genus occurs only in Korea.

Etymology. The species name of the new genus is derived from the common name for “moth” in Korea (Nabang).

Figures

FIGURES 5‒6. Genitalia of Nabangana koreana sp. nov. 5, male genitalia, holotype (genitalia slide number 854); 6, female genitalia, paratype (genitalia slide number 3464). Scale bar: 0.5mm.

FIGURES 1‒4. Morphological features of adults of Nabangana koreana sp. nov. 1, adult, paratype; 2, frontal view of head; 3, lateral view of head; 4, wing venation.