Torodora exilivalvata Park & Heppner, 2023

Park, Kyu-Tek & Heppner, John B., 2023, Review of the genera Thubana Walker and Torodora Meyrick (Lepidoptera: Lecithoceridae) from Sumatra, Indonesia, Zootaxa 5256 (5), pp. 434-456 : 451-453

Torodora exilivalvata Park & Heppner , sp. nov.

LSID: urn:lsid:zoobank.org:act:311C9AFE-FC61-4703-9150-99EF28E96D8F

( Fig. 12 , 13 )

Type specimen. Holotype: Male, N. Sumatra, 7 km SE Prapat , 30 Aug. 1992, ca. 1,400 m, J.B. Heppner & E.W. Diehl, gen. slide no. CIS-6155.

Diagnosis. The new species can be distinguished from its congeners by the forewing with a small, wedge-shaped yellowish-white spot just on the costa before the apex, the termen concave medially with black scales along margin, and the fringe creamy-white in basal half and brownish beyond. The male genitalia also can be distinguished from those of any known species of the genus by having an extremely narrow cucullus.

Description. Male ( Fig. 12A–C ). Wingspan 19.0 mm.

Head: frons creamy white; vertex brownish-orange. Antenna slightly longer than forewing; scape elongated, dark brown centrally on dorsal surface, creamy white on lateral sides; flagellum dark brown dorsally in basal 2/3, then with dark brown annulations beyond. Second segment of labial palpus thickened, dark brown dorsally and ventrally, creamy white lateral sides; 3rd segment slender, as long as 2 nd segment, dark brown dorsally and ventrally, creamy white on lateral sides.

Thorax: tegula and thorax brownish orange. Hind tibia brownish orange in basal 2/5, then creamy white beyond; apex with brownish-orange scales; tarsi yellowish white dorsally, brownish orange ventrally. Forewing brownish orange evenly, with very small, yellowish-white, wedge-shaped spot prior to apex on costa; the spot connected to 4–5 smaller white spots along termen inwardly near to tornus, these spots extended from the costal spot to tornus underside of wing ( Fig. 12.C ); termen concave medially. With blackish scales along margin, slightly sinuate; fringe creamy white in basal half, brownish in distal half; venation with R3 and R4 staked for basal 2/5; R4 and R 5 stalked; R 5 to apex; M 2 present. Hindwing same ground color as the forewing, without any markings on upper surface, white submarginal streak arising from before apex to near tornus ( Fig. 12C ); apex slightly produced; venation with M 2 present; a broad white streak also presented from before apex to tornus on underside of the wing. Abdomen: densely spinose; sternite VIII broad with gently convex posterior margin ( Fig. 13E ).

Male genitalia ( Figs 11A–D ): Uncus elongated, with sharply pointed apex. Median process of gnathos strongly bent from middle. Tegumen weakly sclerotized, deeply concave on anterior margin. Valva expanded near base, then oblique; costa gently concave; cucullus long, narrowly elongated, strongly upturned apically, with arched ventral margin. Juxta broad, without median and latero-caudal processes. Vinculum narrow, banded; saccal zone not produced anteriorly. Aedeagus slightly longer than valva; vental margin arched inwardly; dorsal margin gently arched medially; cornutus absent.

Female unknown.

Distribution. Indonesia (Sumatra).

Etymology. The specific name is derived from the Latin, exilis (= slender, narrow), referring to the narrowed valva of the male genitalia.

Figures

FIGURE 11. Torodora diehliella Park & Heppner, sp. nov.: A, male genitalia, slide no. CIS-6157; B, ditto, aedeagus; C, closeup uncus & gnathos; D, close-up juxta and vinculum; E, abdominal segments VI-VIII; F, female genitalia, slide no. CIS-6156; G, close-up pregenital plate of sternite VII; E, close-up signum. Scale bar: 1.0 mm.

FIGURE 12. Torodora exilivalvata Park & Heppner, sp. nov.: A, adult, male, holotype; B, head, dorsal view; C, under surface of wings; D, head with labial palpus, lateral view.

FIGURE 13. Torodora exilivalvata Park & Heppner, sp. nov.: A, male genitalia, slide no. CIS-6155; B, ditto, aedeagus; C, close-up uncus+gnathos; D, close-up juxta and vinculum; E, close-up distal part of aedeagus; F, abdominal segments VI-VIII. Scale bar: 1.0 mm.