Promalactis scalpelliformis 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 : 292-293

Promalactis scalpelliformis Wang , sp. nov.

( Figs 5 , 12 , 17 )

Type material. CHINA, Sichuan Province: Holotype ♂ , Mt. E’mei (29.57°N, 103.36°E), 830 m, 14.VII.2014, coll. Kaijian Teng, Wei Guan, Xiuchun Wang and Shurong Liu, slide No. LC19108 ♂. Paratypes (2♂, 4♀): 1♀, 13.VII.2014, other same data as holotype, slide No. LC 19035 ; Zhejiang Province: 1♀ , Baishanzu, Qingyuan, 1149 m, 14.VIII.2016, coll. Qingyun Wang, Meiqing Yang and Ping Liu, slide No. LC19071; Taiwan Province ( MNHU): Huisun Exper. Forest , Nantou County, 1♂ , 600 m, 25‒27.IV.1999, slide No. MNHU-NK043, 1♀, 22‒ 24.X.1998, 1♂, 1♀, 1100 m, 22‒24.IV.1999, coll. Mey and Ebert, slide Nos. MNHU-NK039 ♀, MNHU-NK052 ♂, MNHU-NK066 ♀.

Diagnosis. This species can be distinguished from its congeners by having a large knife-shaped uncus, and a valva with a dorsoapical lobe arched dorsad and bearing long setae beyond middle.

Description. Adult ( Fig. 5 ). Wingspan 8.0‒10.0 mm. Head white, occiput yellow. Labial palpus white, inter- mixed with yellow scales; third segment brownish yellow distally, acute apically. Antenna with scape white on dorsal surface except dark brown apically, yellow on ventral surface; flagellum white ringed with dark brown dorsally, white ringed with yellow ventrally. Thorax and tegula pale brownish yellow. Forewing with basal 3/5 orange yellow, distal 2/5 brownish ochreous yellow; three white fasciae edged with sparse black scales: basal fascia extending from base of costal margin obliquely outward to base of dorsum; antemedian fascia extending from about basal 1/5 of costal margin to basal 2/5 of dorsum, oblique outward, parallel with basal fascia, slightly widened anteriorly; postmedian fascia from basal 3/5 of costal margin to dorsum just before end of fold, widest on costal margin, narrowed sub-triangularly to anterior 2/5, with scattered black scales on outer margin, posterior 3/5 narrow, oblique inward; black and grey scales from outer margin of postmedian fascia scattered along termen to apex; apical spot white, small; cilia ochreous brownish yellow along distal part of costal margin, ochreous yellow mixed with black-tipped scales along termen. Hindwing and cilia grey.

Male genitalia ( Fig. 12 ). Uncus heavily sclerotized, knife-shaped, wide at base, narrowed to pointed apex; left margin obliquely straight; right margin arched, with dense spines along distal 3/4, forming a tuft exceeding apex. Tegumen relatively short, produced posterolaterally, concave semicircularly on anterior margin. Valva narrow, subrectangular, with two sclerotized apical lobes: dorsal lobe shorter, arched dorsad and bearing setae beyond middle, narrowed and produced to a spine distally; ventral process longer and wider, narrowed to sharp apex, with strong dense setae. Sacculus broad, shorter than ventral distal process. Saccus shorter than uncus, sub-triangular, rounded anteriorly. Juxta weakly sclerotized, cylindrical. Aedeagus straight, slightly shorter than uncus, sclerotized distally, with a cochlea-like sclerite near apex, with dense fine spines apically; cornutus absent.

Female genitalia ( Fig. 17 ). Apophyses anteriores about 1/4 length of apophyses posteriores. Eighth tergum with sparse short setae; eighth sternum with posterior margin straight, serrate, anterior margin obtuse. Lamella postvaginalis weakly sclerotized, sub-ovate, longitudinally split into two parts from middle, sharp at apex. Ductus bursae membranous, shorter than corpus bursae. Corpus bursae large, oval, densely granulous; signum rhomboid, with a strong spine from middle.

Distribution. China (Sichuan, Taiwan, Zhejiang).

Etymology. The specific name is derived from the Latin scalpelliformis , referring to the knife-like shape of the uncus of the male 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 12‒14. Male genitalia of Promalactis spp. 12, P. scalpelliformis sp. nov., holotype, slide No. LC19108; 13, P. ventericoncava sp. nov., holotype, slide No. DZH09009;14, P. venteriprocessa sp. nov., hototype, slide No. LC19056. 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.