Thubana similidalgona, Yu & Wang, 2025

Yu, Shuai & Wang, Shuxia, 2025, New species and new records of the genus Thubana Walker (Lepidoptera: Lecithoceridae) from China, with a checklist of the genus in the country, European Journal of Taxonomy 987, pp. 81-97 : 90-95

Thubana similidalgona sp. nov.

urn:lsid:zoobank.org:act:8A6E5966-E642-4C5E-A8D8-96CB66EB2C73

Figs 2C , 4C

Diagnosis

The new species is similar to Th. dalgona Park & Heppner, 2022 , in the male genitalia, but it can be distinguished by the forewing lacking a costal patch, and the cucullus uniformly wide; whereas in the latter species, the forewing possess a costal patch ( Park & Heppner 2022: 31, figs 1–2), and the cucullus narrowed distally ( Park & Heppner 2022: 32, fig. 4; Park et al. 2022: pl. 78e).

Etymology

The specific epithet is derived from the Latin ‘ simil- ’ and ‘ dalgona ’, referring to the similarity of the new species and Th. dalgona .

Type material

Holotype

CHINA • ♂; Yunnan Prov., Xishuangbanna, Yexianggu ; 22°10′ N, 100°52′ E; 762 m a.s.l.; 8 Jul. 2015; K.J. Teng and X. Bai leg.; slide no. YS20211 ; NKU.

Paratype

CHINA • 1 ♂; Yunnan Prov., Xishuangbanna, Menglun ; 1335 m a.s.l.; 12 Jun. 2017; K.J. Teng et al. leg.; slide no. YS20161 ; NKU.

Description

Adult male ( Fig. 2C )

Wingspan 18.5‒19.0 mm. Head dark brown, orange white on lateral sides. Antenna orange white except dark brown on scape and base of flagellum. Labial palpus yellowish brown except orange white at apex of second palpomere, third palpomere nearly as long as second palpomere. Thorax and tegula dark brown. Forewing with costal margin nearly straight, apex obtuse, termen shallowly concave; ground colour dark brown, no pattern; fringe greyish black, basal line orange white. Hindwing and fringe dark brown, fringe with an orange white basal line.

MALE GENITALIA ( Fig. 4C ). Uncus wide at the base, shrunken at basal 1/3, broadened in a triangle distally, with an uprightly directed extension from the middle below the posterior margin. Gnathos with median process wide at the base, narrowed to basal 2/3 where it is curved, thereafter abruptly narrowed to pointed apex. Valva broadened and parallel-sided basally, narrowed to cucullus; cucullus about half length of valva, almost uniformly wide, apex rounded, slightly arched ventrally; costa straight in basal1/5, broadly concave in distal 4/5; sacculus broadly banded, slightly sinuate ventrally. Vinculum narrow; saccus welldeveloped, almost trapezoidal. Juxta subquadrate, slightly widened posteriorly, shallowly concave on posterior margin, blunt on anterior margin; with two heavily sclerotised, triangular processes medially below the posterior margin, narrowly connected at base; posterolateral lobe thumbed. Aedeagus slightly shorter than valva, broadened basally, narrowed to middle where it is curved, distal half uniformly wide, spiculose in ventral distal 1/4; cornuti consisting of a small, weakly sclerotised plate at basal 1/4, a cluster of spinules at basal 1/3 dorsally, a denticulate plate about 3/5 length of aedeagus, and dispersed thumbtack-shaped spines running from about middle to before apex.

Female

Unknown.

Distribution

China (Yunnan).

Thubana similidalgona sp. nov.

TL: China (Yunnan). TD: NKU .

Distribution. China (Yunnan).

Figures

Fig. 2. Dorsal habitus of Thubana spp. A. Th. quadrilatera sp. nov., holotype, ♂ (slide no. YS19773, NKU). B. Th. rongjiangensis sp. nov., holotype, ♂ (slide no. LCU009, LCU). C. Th. similidalgona sp. nov., holotype, ♂ (slide no. YS20211, NKU). D. Th. yingjingensis sp. nov., holotype, ♂ (slide no. LCU198, NKU). Scale bars = 2.0 mm.

Fig. 4. Male genitalia of Thubana spp. A. Th. quadrilatera sp. nov., holotype (slide no. YS19773, NKU). B. Th. rongjiangensis sp. nov., holotype (slide no. LCU009, LCU). C. Th. similidalgona sp. nov., holotype (slide no. YS20211, NKU). D. Th. yingjingensis sp. nov., paratype (slide no. LCU195, NKU). E. Th. yingjingensis sp. nov., holotype (slide no. LCU198, NKU). Scale bars = 0.5 mm.