Thubdora trigonoides Park, 2020

Park, Kyu-Tek, Mey, Wolfram, Koo, Jun-Mo, Prins, Jurate De, Akite, Perpetra & Cho, Soowon, 2020, Fourteen new species of the genus Thubdora Park, 2018 (Lepidoptera Gelechioidea: Lecithoceridae) from Uganda, and three new combinations in Ptilothyris Walsingham, 1897 from DR Congo, Zootaxa 4759 (4), pp. 451-487 : 476-478

5. Thubdora trigonoides Park , sp. nov.

( Figs. 18 A–G)

Type specimens. Holotype: male, Uganda, Kibale Nat. Park, Biol. Field Station , 19–24 xi 2014, LF, leg. W. Mey, gen. slide no. CIS-7252 . Paratypes: 1♂, same data as the holotype, gen. slide no. CIS-7009, wing slide no. 7032, COI barcode CBNU062. All types in MfN .

Diagnosis. This new species is externally similar to T. ghesquierei , but it is easily distinguished from the latter by the male genitalia: uncus slightly concave on caudal margin and directed outwardly, valva with triangularly elongated cucullus, juxta trapezoidal with short, acute latero-caudal lobes, and aedeagus stout, with a large sac containing numerous spinules medially.

Description. Male ( Figs. 18 A–D). Forewing length 7.5–8.0 mm. Head: Dark brown dorsally, with pale-orange erect scales laterally. Antenna shorter than forewing; basal segment elongated, pale orange dorsally, dark brown on anterior and posterior surface; flagellum serrate, with fine cilia ventrally, pale orange gradually changing to creamy white towards apex, dark-brown annulations irregularly. Second segment of labial palpus thickened, yellowish brown on outer surface, pale orange on inner surface; 3 rd segment slender, strongly upturned, shorter than 2 nd segment, pale orange all around.

Thorax: Notum and tegula dark brown; ventral surface of legs orange white. Forewing costa arched in basal 1/4, strongly oblique beyond 3/4; apex obtuse; termen slightly concave below apex; venation ( Fig. 18D ) with R 1 strongly bent outwardly near base, distance between R 1 and R 2 twice or longer than that between R 2 and R 3; R 3 and R 4 stalked in proximal half; R 5 absent; M 1 close to R 3+4 at base; M 2 nearly parallel to M 3; M 3, CuA 1 and CuA 2 on a common stalk, 1A+2A shortly forked at base; cell closed; fringe black. Hind wing broader than forewing; apex obtuse; venation with M 2 absent; M 3 and CuA 1 short-stalked; cell closed about middle of the wing.

Abdomen ( Fig. 18G ): No hair-pencils developed in abdominal segment VII-VIII; abdominal segment VIII with heavily sclerotized, crescent anterior margin, with several spines on dorsal surface, not specifically modified on ventral surface. Male genitalia ( Figs. 18E, F ): Uncus with large, latero-caudal processes; anterior margin concave medially. Basal plate of gnathos with round caudal margin; median process elongated, curved pre-apically. Tegumen with thumb-like lobes bearing setae in distal part, incised in inverted V-shape on anterior margin. Valva expanded near base on costa; ventral margin slightly concave before low corner of cucullus; cucullus narrowed toward apex, strongly upturned, densely setose; apex narrowly produced. Juxta trapezoidal, slightly broadened distally, with acute latero-caudal processes, slightly convex medially on caudal margin, with a narrow stalk anteriorly. Vinculum band-like, triangularly produced anteriorly. Aedeagus stout, broad at base, gradually narrowed towards apex; apex sharply produced; cornuti consisting of two different-sized bundles with numerous spines.

Female unknown.

Distribution. Uganda (Kabarole Distr.).

Etymology. This species name is derived from the Greek trigono (= triangular), referring to the triangularly elongated cucullus of the male genitalia, with a Greek superlative ending - oides.

Figures

FIGURE 18. Thubdora trigonoides Park, sp. nov.: A, adult, holotype; B, base of antenna, holotype; C, labial palpus, lateral view, holotype; D, venation; E, male genitalia, paratype, gen slide no. CIS- 7009; F, aedeagus, same paratype; G, abdominal segments VI–VIII, same paratype. Scale bar for genitalia and aedeagus: 1.0 mm.