Promalactis bigeminata Wang, 2019

Wang, Shuxia & Liu, Chen, 2019, Taxonomic study of the genus Promalactis Meyrick, 1908 (Lepidoptera: Oecophoridae) VI. The bigeminata species group, with descriptions of seven new species, Zootaxa 4679 (2), pp. 286-296 : 287-288

Promalactis bigeminata Wang , sp. nov.

( Figs 1 , 8 , 15 )

Type material. CHINA, Guangxi Zhuangzu Autonomous Region : Holotype ♂, Mt. Daming (23.53°N, 108.34°E), 1250 m, 24.V.2011, coll. Linlin Yang and Yinghui Mou, slide No. DZH11028 . Paratypes (24♂, 78♀): 23♂, 68♀, 20‒29.V.2011, other same data as holotype, slide Nos. LC 19013 ♀, LC19015 ♀, LC19018 ♀, LC19019 ♀, LC19020 ♀, LC19021 ♀, LC19022 ♀, LC19023 ♀, LC19024 ♀, DZH11027 ♀, DZH002 ♂, DZH004 ♀, DZH005 ♂ (4♂, 4♀ deposited in NHMUK) ; 3♀, 1200 m, 6‒7.VII.2011, coll. Shulian Hao and Yinghui Sun, other same data as holotype, slide No. LC 19029 ; 1♀, Shaoping, Pingxiang , 280 m, 23.VII.2012, coll. Xiaofei Yang and Zhenguo Zhang, slide No. DZH12293 ; Guizhou Province: 1♂, 6♀, Pinghe, Xishui , 1200 m, 1.VI.2000, coll. Yanli Du, slide Nos. DZH10320 ♀, DZH10321 ♂, DZH10340 ♀, DZH10341 ♀.

Diagnosis. This species can be distinguished from other members of the bigeminata group by the left lateral process of the uncus with the distal half densely setose and broadened sub-elliptically, the costa with a stout process longer than the saccus, and the dorsoapical lobe of the valva with a slender, very long process arising from its base.

Description. Adult ( Fig. 1 ). Wingspan 9.0‒11.0 mm. Head white, with scattered yellow scales laterally. Labial palpus white, second segment with basal 2/3 yellow on outer surface, third segment with distal 1/3 black. Antenna white except scape black apically and flagellum annulated with blackish brown on dorsal surface. Collar white; thorax orange yellow except less than 1/5 white distally; tegula orange yellow. Forewing orange yellow from base to basal 3/5, thereafter pale brownish yellow to apex; with three white fasciae: basal fascia at proximal base; antemedian fascia wider than basal fascia, extending from about basal 1/5 of costal margin to about middle of dorsum, oblique outward, widened anteriorly; postmedian fascia from basal 2/3 of costal margin to dorsum near end of fold, oblique inward, anterior 2/5 extended outward and forming a sub-quadrate costal spot, with scattered black scales on outer margin, posterior 3/5 uniformly narrow, slightly diffused outward, with grey and black scales scattered from outer margin of posterior half to inner margin of apical spot along termen, interrupted with white scales or dots; apical spot white, ovate; cilia orange yellow along distal part of costal margin, greyish yellow along termen, tinged with black-tipped scales. Hindwing and cilia grey.

Male genitalia ( Fig. 8 ). Uncus narrow and arched backward medially, lateral arms asymmetrical: left arm with basal half narrow, distal half broadened sub-elliptically, densely setose; right arm slender, slightly shorter than left one, distally narrowed to pointed apex. Tegumen widened medially. Valva narrow at base, broadened medially, distinctly narrowed from about distal 1/3 to before apex; apex bilobed, forming two small, heavily sclerotized triangular lobes: dorsal lobe slightly smaller, with a slender, sinuate, very long process arising from its base; costa with a large, sparsely setose, sub-clavate process from beyond middle extending horizontally outward, wider basally, rounded apically, reaching apex of dorsal lobe. Sacculus weakly sclerotized, uniformly narrow. Saccus parallel laterally, rounded apically. Juxta with basal 3/4 slender, weakly sclerotized; distal 1/4 bilobed, broadened sub-triangularly, exceeding median part of uncus; anterior lobe finely clavate. Aedeagus straight, about 1.5 times length of valva, with a small weakly sclerotized triangular sclerite and two thorn-like processes distally; cornutus absent.

Female genitalia ( Fig. 15 ). Apophyses anteriores about half length of apophyses posteriores. Eighth tergum sinuate on posterior margin, with small process posterolaterally; sternum sclerotized on anterior margin. Seventh sternum with a large weakly sclerotized round area medially. Lamella postvaginalis paired, heavily sclerotized, somewhat foliate, narrowed posteriorly, serrate on posterior margin. Ductus bursae sclerotized, uniform, slightly shorter than corpus bursae. Corpus bursae large, sub-oval, densely granulous, with a small sub-round sclerite posteriorly; signum sub-rhomboid, serrate on margins, with a ridge along midline.

Distribution. China (Guangxi, Guizhou).

Etymology. The specific name is derived from the Latin bigeminatus, referring to the paired lamella postvaginalis of the female genitalia.

Figures

FIGURES 1‒7. Adults of Promalactis spp. 1, P. bigeminata sp. nov., holotype, ♂; 2, P. derecta sp. nov., holotype, ♂; 3, P. pectinacea sp. nov., holotype, ♂; 4, P. pileata sp. nov., holotype, ♂; 5, P. scalpelliformis sp. nov., holotype, ♂; 6, P. ventericoncava sp. nov., holotype, ♂; 7, P. venteriprocessa sp. nov., paratype, ♀; 7b, head. Scales = 2 mm except 7b = 0.2.

FIGURES 8‒11. Male genitalia of Promalactis spp. 8, P. bigeminata sp. nov., paratype, slide No. DZH10321; 9, P. derecta sp. nov., holotype, slide No. DZH09023; 10, P. pectinacea sp. nov., holotype, slide No. ZMUC-NK019; 11, P. pileata sp. nov., holotype, slide No. DZH09007. Scales = 0.2 mm.

FIGURES 15‒18. Female genitalia of Promalactis spp. 15, P. bigeminata sp. nov. paratype, slide No. DZH10320; 16, P. pileata sp. nov., paratype, slide No. DZH08087; 17, P. scalpelliformis sp. nov., paratype, slide No. LC19035; 18, P. venteriprocessa sp. nov., paratype, slide No. LC19032. Scales = 0.2 mm.