Thubdora corystos 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 : 471-474

2. Thubdora corystos Park , sp. nov.

( Figs. 15 A–G)

Type specimen. Holotype: male, Uganda, Mpigi, Mpanga Forest , 0˚12ʹ24ʹʹN 32˚18ʹ05ʹʹE, 1–5 v 2019, leg. KT Park, JM Koo, JD Kim; gen. slide no.CIS-7334 . Paratypes: 4♂, 1♀, same data as holotype; gen. slide no. CIS-7338 (♂) & CIS-7344 (♂), COI barcode CBNU118; CIS-7346 (♂); CIS-7352 (♀). All types in NIBR .

Diagnosis. The new species is similar to T. bilobella in forewing color pattern and hardly distinguishable by superficial characters, but it can be distinguished from the latter by the less elongated forewing and the male genitalia: uncus much broader with caudal processes directed outwardly; basal plate of gnathos broader, helmet-shaped; cucullus less elongated, not strongly upturned; juxta shorter and broader.

Description. Male ( Figs. 15A, B ). Forewing length 7.5–8.0 mm. Head: Dark purple dorsally, with pale-orange erect scales laterally. Antenna shorter than forewing; basal segment elongated, pale orange dorsally, dark brown on anterior and ventral surface; flagellum serrate, with fine cilia ventrally, pale orange gradually becoming creamy white from near middle toward apex, with dark annulations basally, often indistinct. Second segment of labial palpus thickened, greyish brown on outer surface, gradually paler toward apex; 3 rd segment slender, shorter than 2 nd segment.

Thorax: Thorax and forewing color pattern nearly identical to those of T. bilobella . Forewing less elongated than that of T. bilobella .

Abdomen ( Figs. 15C, D ): Dark brown on dorsal surface; hair-pencils between segment VII and VIII not developed. Tergite VIII heavily sclerotized, crescent anterior margin. Male genitalia ( Figs. 15E, F ): Uncus short, broad, with latero-caudal processes directed outwardly; caudal margin concave medially. Basal plate of gnathos broad, helmet-shaped; median process not abruptly curved pre-apically. Tegumen incised in inverted V-shape on anterior margin. Valva slightly expanded on costa basally; cucullus not strongly upturned, triangularly elongated in distal half, with narrowly produced apex, densely setose. Juxta short and broad, not exceeding upper base of valva, concave on caudal margin, with crescent ventral plate medially; latero-caudal processes short, triangular. Vinculum band-like. Aedeagus stout, broad at base, with heavily sclerotized apical plate ventrally and gradually narrowed to- wards apex dorsally, with sharply produced apex; cornuti consisting of a heavily sclerotized, strong spine with long extension anteriorly, about half the length of aedeagus, and a row of spines, about 2/3 of the spine. Female genitalia ( Fig. 15G ): Abdominal sternite VII deeply emarginated in U-shape medially. Ostium bursae concave, with crescent caudal margin. Antrum elongated, sclerotized, about 1/2 the length of ductus bursae. Ductus bursae short, broadened over all. Corpus bursae large, elongated, bearing at least 15 strong spines scattered in posterior half, with a simple accessory bursae broadly joined posteriorly near cervix; signum plate large, nearly rectangular, about 1/2 the width of corpus bursae, with narrow, serrate posterior and anterior lips.

Distribution. Uganda (Mpigi Distr.).

Etymology. This species name is derived from the Greek korys (= helmet), referring to the helmet-shaped basal plate of the gnathos in the male genitalia.

Figures

FIGURE 15. Thubdora corystos Park, sp. nov.: A, adult, holotype; B, lateral view of abdomen; C, abdominal segment VI–VIII; D, abdominal sternite VIII; E, male genitalia, holotype, gen. slide no. CIS-7334; F, aedeagus, holotype; G, female genitalia (with a close-up of signum), gen. slide no. CIS-7349. Scale bar for genitalia and aedeagus: 1.0 mm.