Thubana selenisa 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 : 446-447

Thubana selenisa Park & Heppner , sp. nov.

LSID: urn:lsid:zoobank.org:act:6D0CB96C-3727-4805-A98E-213B578967FE

( Fig. 8 )

Type specimen. Holotype: Male , Indonesia, N. Sumatra, 18 km NE Prapat, 8–14 Nov. 1985, ca. 1,050 m, J.B. Heppner & E.W. Diehl, gen. slide no. CIS-6153.

Diagnosis. The male genitalia of the new species are very similar to those of T. ochracea Park & Abang, 2005 , but the new species can be easily distinguished by the brownish-orange ground color of both wings, with yellowishorange, triangular costal patch on the forewing, and the brownish orange head, whereas in T. ochracea the ground color of both wings are dark mustard brown, with a quadrate costal patch, and the head with yellowish-white rough scales dorsally. The male genitalia also can be distinguished from each other as follows: 1) anterior margin of tegumen more or less rounded (sharply pointed apically in T. ochracea ); 2) outer margin of cucullus gently arched (more angled in T. ochracea ); 3) mesial plate of juxta broadly developed in crescent (more or less triangular in T. ochracea ); 4) basal half of aedeagus broader than that of T. ochracra ; ductus ejaculatorius of aedeagus differs as illustrated in Fig 8E and Fig. 9E .

Description. Male ( Figs 8A, B ). Wingspan 16.0 mm.

Head: frons yellowish white; vertex grayish brown. Antenna longer than forewing, about 1.4 times; scape elongated, broadened distally, grayish brown dorsally; flagellum shiny yellowish white, without annulations. Second segment of labial palpus thickened, strongly arched, grayish brown on outer surface, yellowish white on inner surface, brownish in apical 3rd; 3rd segment slender, longer than 2 nd segment.

Thorax: tegula and thorax brownish orange. Hind tibia with dark-brown sales dorsally, orange white scales before middle, orange white ventrally; 1 st and 2 nd tarsi with dark-brown scales apically. Forewing ground color brownish orange; costal patch large, triangular, yellowish white, lower corner reached to lower margin of discal cell; apex produced; termen oblique; fringe with yellowish-white scales between apex and M 1. Hindwing ground color same as that of forewing, without markings.

Male genitalia ( Figs 8C–E ): Uncus somewhat stout, narrower toward apex; apex blunt. Median process of gnathos relatively long, strongly bent beyond 2/3. Tegumen deeply concave on anterior margin. Valva broad; costa roundly expanded basally, deeply concave medially; ventral margin nearly straight; cucullus thumb-like, densely setose, with a cluster of long setae near lower corner; outer margin gently arched; apex roundly produced. Juxta broad, with short, digitate latero-caudal lobes; median plate crescent, heavily sclerotized. Vinculum banded. Aedeagus narrower toward apex, longer than valva, broad basally; cornutus absent.

Female unknown.

Distribution. Indonesia (N. Sumatra).

Etymology. The specific name is derived from the Greek, selenis (= crescent), referring to the crescent median plate of the juxta in the male genitalia.

Figures

FIGURE 8. Thubana selenisa Park & Heppner, sp. nov.: A, adult, male, holotype; B, head, dorsal view; C, male genitalia, slide no. CIS=6153; D, ditto, aedeagus; E, close-up central part; F, abdominal segments VII-VIII. Scale bar: 1.0 mm.

FIGURE 9. Thubana ochracea Park & Abang, 20o5: A, adult; B, Head with antenna; C, male genitalia, slide no.JBH-4148; D, ditto, aedeagus; E, close-up central part; F, abdominal segments VI-VIII. Scale bar: 1.0 mm.