Promalactis tengchongensis Wang, 2021

Wang, Shuxia & Liu, Chen, 2021, Taxonomic study of the genus Promalactis Meyrick, 1908 (Lepidoptera: Oecophoridae) X. The commotica species-group, with descriptions of twenty-two new species, Zootaxa 4980 (2), pp. 293-330 : 321-322

Promalactis tengchongensis Wang , sp. nov.

( Figs 21 , 43 )

Type material. CHINA, Yunnan: Holotype ♂, Linjiapu (25.29°N, 98.70°E), Tengchong City , 2144 m, 15.VIII.2014, leg. KJ Teng et al., slide No. HXM14152 . Paratypes (9♂): 7♂, same data as holotype, except 14‒16.VIII.2014, slide Nos. JYY17845, HXM14153, JYY17435, JYY17436, JYY17437 ; 1♂, Nankang, Baoshan , 2009 m, 17.VIII.2014, leg. KJ Teng, slide No. LC 19592 ; 1♂, Dahaoping , Tengchong County, 2020 m, 11.VIII.2015, leg. KL Liu & JX Zhao, slide No. LC 19350 .

Diagnosis. The new species can be distinguished from other species of the group by the unique male genitalia in which both the uncus and gnathos are bilobed distally, and the dorsal lobe of the valva has a tuft of scales.

Description. Adult ( Fig. 21 ). Forewing length 5.5‒7.0 mm.

Head: Vertex and frons greyish brown, occiput rust brown. Labial palpus with second palpomere orange yellow, paler on inner surface; third palpomere blackish brown except white at apex. Antenna with scape white; flagellum black, with white annulations on dorsal surface.

Thorax: Dorsum of mesothorax and tegula pale ocherous brown to rust brown. Forewing orange yellow, with dense blackish brown scales between fold and dorsum; markings white edged with blackish brown scales: costal spot inverted sub-triangular, extending from between basal 3/5 and beyond distal 1/4 to posterior angle of cell; basal streak slender, oblique inward to base of fold; antemedian streak from dorsal 2/5 to anterior margin of cell, then bent inward; dorsal streak arched, from basal 3/5 oblique outward to posterior margin of cell; tornal spot blackish brown, diffused inward to end of dorsal streak, pretornal spot represented by a few white scales; apical spot large, ovate, not well separated from terminal spots; fringe orange yellow except greyish brown around tornus. Hindwing and fringe deep grey. Fore- and midlegs white on ventral surface; dorsal surface black, tibiae with two white dots, with white scale tufts at apex, tarsi white at apices of basal two tarsomeres; hindleg with ventral side yellow, dorsal side brown except tarsus white distally at each tarsomere.

Abdomen: Male genitalia ( Fig. 43 ). Uncus with basal 2/3 parallel-sided, distal 1/3 bifurcate in broad V-shape, each lobe narrowed to pointed apex. Gnathos approximately as long as uncus; mesial plate sub-rectangular, squamous on distal 3/5; apex broadly concave at middle, forming two lobes anterolaterally; basal arms shorter than mesial plate. Tegumen furcate from posterior 1/4; lateral arms slightly narrowed to rounded apex. Valva sub-parallel-sided basally, bilobed distally: dorsal lobe lanceolate, with setae along middle longitudinally, forming a distinct distal tuft of long setae, rounded at apex; ventral lobe with dorsal margin straight, ventral margin roundly produced and setose basally, deeply concave inward and narrowed beyond middle, widened and with tiny denticles distally, obtuse at apex; costa very short, shorter than dorsal lobe; sacculus narrow, not distinct basally. Saccus shorter than uncus, rounded at apex. Juxta narrow in basal 1/3, parallel-sided from basal 1/3 to distal 4/5 laterally, then obliquely narrowed to pointed apex on right side, with fine tufted setae; basal lobe clubbed, extremely slender, longer than saccus. Aedeagus shorter than valva, spatulate distally, with denticles apically; cornutus absent.

Female. Unknown.

Distribution. China (Yunnan).

Etymology. This specific epithet refers to the type locality, Tengchong, Yunnan Province.

Figures

FIGURES 17‒22. Adults of Promalactis spp. 17, P. similibellatula, holotype, ♂; 18, P. squamacea, holotype, ♂; 19, P. stenognatha, holotype, ♂; 20, P. subgladiata, holotype, ♂; 21, P. tengchongensis, holotype, ♂; 22, P. triangulivalva, holotype, ♂. Scales = 2 mm.

FIGURES 40‒44. Male genitalia of Promalactis spp. 40, P. squamacea, holotype, slide No. DZH12334; 41, P. stenognatha, paratype, slide No. JYY17582; 42, P. subgladiata, holotype, slide No. LC19714; 43, P. tengchongensis, holotype, slide No. HXM14152; 44, P. triangulivalva, holotype, slide No. JYY17244. Scales = 0.2 mm.