Torodora diehliella 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 : 449-451

Torodora diehliella Park & Heppner , sp. nov.

LSID: urn:lsid:zoobank.org:act:536EDDBB-2BE4-4B7E-8C82-BA2EA054B593

( Figs 10 , 11 )

Type specimen. Holotype: Male, Indonesia, N. Sumatra, 43 km SW P[ematang] Siantar (HW 4), 24–26 Aug. 1992, 1,200 m, J.B. Heppner & E.W. Diehl, gen. slide no. CIS-6157.

Paratypes. 2♀, same data as the holotype, gen. slide no. CIS-6156 .

Diagnosis. The new species is characterized by the forewing ground color brownish-orange evenly, with a very small costal patch near 3/4 of the costa and the hind tibia. The male genitalia can be distinguished from those of any known species of the genus by the uncus elongated and the cucullus broadened with a truncated apical margin.

Description. Male ( Figs 10A–D ). Wingspan 17.0–18.0 mm.

Head: frons creamy white mixed with brownish scales; vertex same color as frons with brownish-orange scales posteriorly. Antenna slightly shorter than forewing; scape elongated, brownish orange dorsally, creamy white mixed with brownish scales ventrally; flagellum yellowish white, with distinct dark-brown annulations dorsally in about basal 1/3, then weaker beyond. Second segment of labial palpus long. slightly thickened with rough scales ventrally, mustard brown on outer surface with white apex, yellowish white on inner surface with brownish ring before apex; 3rd segment slender, as long as 2 nd segment, mustard brown ventrally. Thorax: tegula and thorax brownish orange. Hind tibia mustard brown dorsally with white yellowish white band apically; tarsi with dark brown band apically each segment. Forewing brownish orange evenly, with very small, yellowish-white costal patch at 3/4 of costa; costa nearly straight beyond basal 1/4; costal patch very small; apex roundly produced; termen oblique, slightly sinuate; fringe concolorous, yellowish white in apical 3 rd ( Fig. 11C ); venation with R 3 stalked with R 4+5 for basal half; R 4 and R 5 stalked, R 5 to termen; M 3 free; CuA 1 and CuA 2 staked for about basal half. Hindwing same ground color as the forewing; apex slightly produced; venation with M 2 present; M 3 and CuA 1 stalked. Abdomen ( Fig. 11E ): densely spinose; sternite VIII semi-ovate protrusion medially. as in Fig. 1 G .

Male genitalia ( Figs 11A–D ): Uncus elongated, with sharply produced apex, densely setose on apical part ventrally. Gnathos with median process strongly bent downward apically. Tegumen weakly sclerotized, deeply concaved on anterior margin. Valva broadly expanded in basal 1/3, then oblique; costa concaved; ventral margin deeply concaved medially, with triangular protrusion before emagination; cucullus broad, thumb-like, with truncated apical margin and arched ventral margin. Juxta broad, quadrate, caudal margin slightly concave, without latero-caudal processes. Vinculum band-shaped. Aedeagus stout, longer than valva, broadened in basal half, rounded apically; vental margin bent before middle; dorsal margin gently arched in basal 2/3; cornutus absent.

Female genitalia ( Figs 11F–H ): Abdominal sternite VIII deeply emarginated at middle ( Fig. 11F ). Antrum weakly developed, triangular, membraneous. Ductus bursae narrowed in distal 1/5, then broadened as wide as 1/2 width of corpus bursae, wrinkled; ductus seminalis arising from distal end of broadened area. Corpus bursae semiovate, more or less elongated; signum elliptical with nearly flattened apical margin, densely covered with minute conical spines.

Distribution. Indonesia (N. Sumatra).

Etymology. The specific name is derived from the name of the 2nd collector of the holotype, the late Dr. E. W. Diehl, formerly of Pematang Siantar.

Figures

FIGURE 1. Map of Northern Sumatra sites: 1) 43 km. SW Pematang Siantar ("HW4" of Diehl, or 'forest road 4') (1,200 m); 2) 18 km. NE Prapat (1,050 m); 3) 7 km. SE Prapat (1.400 m); 4) 5 km. SE Sipirok Hot Springs (1,100 m); 5) 6 km. N. Bungabondar (ca. 900 m).

FIGURE 10. Torodora diehliella Park & Heppner, sp. nov.: A, adult, male, holotype; B, head with labial palpus; C, left wing; D, hind tibia and tarsi.

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.