Promalactis binipapillata 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 : 302-303

Promalactis binipapillata Wang , sp. nov.

( Figs 7 , 29 , 46 )

Type material. CHINA, Yunnan: Holotype ♂, Taiyanghe Nature Reserve (22.68°N, 101.03°E), Pu’er City, 9. VI.2015, leg. ZG Zhang, slide No. JYY17611 . Paratypes (2♂, 7♀): 1♂, 2♀, 8‒9. VI.2015, slide No. JYY17859 ♀, other same data as holotype ; 1♀, Taiyanghe Nature Reserve , 1450 m, 23.VIII.2014, leg. ZG Zhang, slide No. JYY17881 ; 1♀, Taiyanghe National Forest Park, Pu’er City , 1450 m, 3‒6.VII.2015, leg. KJ Teng, slide No. JYY17883 . Thailand: 1♂, Doi Suthep-Pui , Chiang Mai, 1440 m, 22‒23.IX.1986, leg. G.S. Robinson, slide No. NHMUK-010316888 .

Diagnosis. The new species can be distinguished from its congeners by two features of the male genitalia: a tower-like uncus and a narrowly elongate valva with a dense patch of large setae and fine hairs along the ventral margin of the distal 3/5.

Description. Adult ( Fig. 7 ). Forewing length 5.5‒6.5 mm.

Head: Vertex shining white, frons silvery grey, occiput rust brown. Labial palpus with second palpomere pale ocherous yellow, paler on inner surface; third palpomere blackish brown. Antenna with scape white; flagellum black, with white annulations on dorsal surface.

Thorax: Dorsum of mesothorax and tegula rust brown. Forewing orange yellow; markings white edged with black scales: costal spot sub-rectangular, extending obliquely outward to middle of outer margin of cell; basal streak oblique inward to base of fold, straight; antemedian streak from dorsal 2/5 to basal 2/5 of anterior margin of cell, slightly arched outward; dorsal streak from basal 2/3 extending obliquely outward to below and before posterior angle of cell; tornal spot small, with a black line extending from its anterior margin arched to end of dorsal streak; apical spot ovate; two terminal spots smaller, narrowed to posterior corner of termen, interrupted by black scales; fringe mostly orange yellow, greyish brown along distal part of costal margin and around tornus. Hindwing and fringe brown. Fore- and midlegs white on ventral surface, black on dorsal surface, tibiae with white scale tufts at apex, tarsi with basal two tarsomeres white distally; hindleg yellowish white ventrally, brown dorsally except tarsus white at apex of each tarsomere.

Abdomen: Male genitalia ( Fig. 29 ). Uncus tower-like, widened from base to basal 1/4, then narrowed to basal 2/3, distal 1/3 uniformly slender, rounded at apex; two pairs of lateral papillary lobes, one at basal 1/4 and another at basal 2/3, both with long setae. Gnathos shorter than uncus; mesial plate broad tongue-shaped, rounded apically, distal 3/5 spiculate; basal arms shorter than mesial plate, slightly narrowed at base. Tegumen widened to posterior 2/5; lateral arms slightly narrowed to rounded apex. Valva elongate, basal 2/5 uniform in width, with a distinct basal opening, distal 3/5 slightly narrowed to rounded apex, with large dense setae and fine hairs along ventral margin and around apex. Sacculus wide at base, narrowed to distal end, apically reaching beyond basal 1/3 of ventral margin; saccus approximately half length of valva, narrowed to rounded apex. Juxta broad, triangularly produced distally; basal lobe clubbed. Aedeagus almost as long as valva, slightly curved; cornutus absent.

Female genitalia ( Fig. 46 ). Papillae anales setose, rounded caudally. Apophyses posteriores 3 times length of apophyses anteriores. Lamella postvaginalis tubular, with sparse setae distally, straight apically; lamella antevaginalis broad cup-shaped, with a spine lateroapically. Ductus bursae with basal 2/3 heavily sclerotized, uniform in width, distal 1/3 broadened, membranous, with a narrow spiral belt bearing 1‒2 short spines. Corpus bursae 0.5 time length of ductus bursae, granulate; signum consisting of two short denticles, with a weakly sclerotized basal plate.

Distribution. China (Yunnan); Thailand.

Etymology. The specific epithet is derived from the Latin bini- and papillatus, referring to the two pairs of papillary lobes of the uncus.

Figures

FIGURES 1‒8. Adults of Promalactis spp. 1, P. apiculifera, holotype, ♂; 2, P. apisetosa, holotype, ♂; 3, P. arcicosta, holotype, ♂; 4, P. baoshana, holotype, ♂; 5, P. bicornuta, holotype, ♂; 6, P. bilobignatha, paratype, ♂; 7, P. binipapillata, paratype, ♀; 8, P. bispina, paratype, ♀. Scales = 2 mm.

FIGURES 29‒34. Male genitalia of Promalactis spp. 29, P. binipapillata, holotype, slide No. JYY17611; 30, P. bispina, holotype, slide No. JYY17858; 31, P. curvicosta, holotype, slide No. LC19516; 32, P. denticuligera, holotype, slide No. LC19310; 33, P. lianhuashana, holotype, slide No. JYY17753; 34, P. motuoensis, holotype, slide No. JYY17672. Scales = 0.2 mm.

FIGURES 45‒50. Female genitalia of Promalactis spp. 45, P. arcicosta, slide No. LC19394; 46, P. binipapillata, slide No. JYY17673; 47, P. bispina, slide No. JYY17838; 48, P. curvicosta, slide No. LC19762; 49, P. denticuligera, slide No. LC19313, 49a, enlarged ductus bursae, 49b, enlarged singum, slide No. JYY17327; 50, P. motuoensis, slide No. JYY17597. All paratypes. Scales = 0.2 mm.