Thubdora angustiala Park & Karisch, 2021

Park, Kyu-Tek & Karisch, Timm, 2021, The family Lecithoceridae (Lepidoptera, Gelechioidea) from Bioko Island (Equatorial Guinea), with descriptions of five new species, Zootaxa 4995 (3), pp. 581-593 : 587-588

Thubdora angustiala Park & Karisch , sp. nov.

LSID: urn:lsid:zoobank.org:act:CF4C608C-AC71-498C-A801-F326853779EC

( Figs. 5A–C )

Type specimen. – Holotype: ♀, Equatorial Guinea, Island of Bioko (former Fernando Póo), Gran Caldera Volcanica de Luba u Ose, outer NNE slope about 4 km SSW Ruiché, 5 km S of Luba, higher altitude primary rain forest, 1,200 m, 3°22’30” N 8°32’30” E, 18.viii.1994, at light, leg. T. Karisch, gen. slide no. 3827/ Karisch, deposited in coll. Karisch in SDEI.

Diagnosis. This new species is similar to the preceding new species, T. biocoica , but it can be easily distinguished from the latter by the following characters: the forewing more elongated, with a small, yellowish-white costal patch located before 3/4 of costa, and the termen very oblique, whereas in T. biocoica the costal patch is located nearer to apex and the termen not oblique, nearly straight.

Description. Female ( Figs. 5A, B ). Forewing length 8.5 mm.

Head: Dark brown dorsally, with yellowish-white erect scales laterally. Antenna slightly shorter than forewing; scape elongated; flagellum slightly ciliate-fasciculate, yellowish white with dark-brown annulations. Labial palpus with very short 1 st segment; 2 nd segment thickened, more or less flattened, curved upward, yellowish brown on outer surface, dark brown dorsally and ventrally; 3 rd segment strongly upturned, slender, as long as second segment, yellowish white, speckled with dark-brown scales.

Thorax: Tegula and thorax dark brown dorsally. Median legs with dark-brown femur; tibia dark brown, paler towards apex, with a pair of spurs terminally, the inner one 2.5 times longer than the outer one. Hind leg with darkbrown femur; tibia with brownish rough scales above, with pale-yellow scales apically; spurs at middle and near end, inner one more than 2 times longer than the outer one. Forewing nearly parallel-sided; ground color dark brown with a small, triangular yellowish-white costal patch at about basal 3/4; no transverse lines or streaks presented; apex rounded; termen oblique and slightly sinuate, fringes concolorous with ground color, with a narrow yellowishwhite basal line along margin. Hind wing brownish gray; fringes concolorous with ground color, with narrow yellowish-white basal line.

Abdomen: Dark brown, with pale yellowish brown terminal segment. Spinose zones with very strong spines on dorsal surface.

Female genitalia ( Figs. 5C ): Abdominal sternite VIII deeply emarginated medially, into U-shape. Apophyses anteriores about half the length of apophyses posteriores. Ostium bursae gently concave.Antrum heavily sclerotized, quadrate, sharply produced latero-caudally, slightly concave on lateral margin, connecting membranous swollen posterior part of ductus bursae. Ductus bursae broad in posterior 2/5, gradually broader distally; narrowed in anterior 3/5, nearly parallel-sided, once coiled anteriorly. Corpus bursae ovate, about half the length of ductus bursae; signum with hood-shaped plates divided by a broad, transverse groove medially.

Male unknown.

Distribution. Known from the type locality on Bioko only.

Etymology. The species name is derived from the Latin, angusti (= narrow) and ala (= wing), referring to the narrowed forewing.

Figures

FIGURE 5. Thubdora angustiala Park & Karisch, sp. nov.: A, adult, holotype; B, dorsal surface of head and thorax; C, female genitalia, slide no, 3827/Karisch. Scale bar for the genitalia with aedeagus: 1.0 mm.