Promalactis curvitaeniata Wang, 2019

Wang, Shuxia & Jia, Yanyan, 2019, Taxonomic study of the genus Promalactis Meyrick, 1908 (Lepidoptera: Oecophoridae) IV. The sakaiella species group, with descriptions of fifteen new species, Zootaxa 4563 (3), pp. 491-515 : 499-500

Promalactis curvitaeniata Wang , sp. nov.

( Figs 9 , 23 , 35 )

Type material. CHINA , Guangxi Zhuangzu Autonomous Region: Holotype ♂, Huaping Village (23.97°N, 109.72°E), Longsheng County, 1300 m, 1.VIII.2006, coll. Weichun Li, slide No. DZH11058. Paratypes (1♂, 1♀): 1♂, same data as holotype; 1♀, Mt. Daming, Nanning , 1200 m, 5.VIII.2011, coll. Shulian Hao and Yinghui Sun, slide No. DZH11053 .

Diagnosis. This new species is similar to P. biprosessa sp. nov. in having a similar forewing pattern and a curved free distal process of the valva. It can be distinguished from P. biprosessa sp. nov. in the male genitalia by having an elongate triangular saccus with pointed apex and the valva lacking an inner process. In P. biprosessa sp. nov. the saccus is uniformly wide except slightly narrowed from preapex to obtuse apex, and the valva has a large inner process arising from beyond its middle.

Description. Adult ( Fig. 9 ) wingspan 12.5 mm. Head with vertex shining creamy white, frons brown, occiput deep copper brown. Labial palpus with first and second segments orange yellow on inner surface, ocherous brown on outer surface; third segment black, almost as long as second segment. Antenna with scape white; flagellum with basal 1/3 white and distal 2/3 white annulated with black on dorsal surface, dark brown on ventral surface. Thorax and tegula deep copper brown. Forewing orange yellow, dark brown along basal 2/3 of costal margin; dorsum with a copper brown stripe along base, with a white line along its outer margin; median fascia ocherous yellow, broad, ill-defined, its inner margin with a deep silvery grey streak along posterior 2/3, extending from basal 3/4 of dorsum slightly inward to about middle of upper margin of cell, mixed with black scales, with a white line along inner margin of silvery grey streak; deep silvery grey fascia along outer margin of median fascia, from beyond basal 2/3 of costal margin reaching tornus, mixed with black scales, with a white stripe along anterior 2/5 of its outer margin; distal patch black, mixed with grey and yellowish brown, narrowed from apex along termen to tornus, meeting deep silvery grey fascia; cilia yellow except deep grey along distal aprt of costal margin and around tornus on extension of distal patch and silvery fascia. Hindwing and cilia deep grey. Fore- and midlegs black on dorsal side, greyish white on ventral side, tarsi white at apex of each tarsomere; hindleg grey, tarsus yellowish white except pale brown at apex of each tarsomere.

Male genitalia ( Fig. 23 ). Uncus separated from near base, lateral arms narrow, pointed at apex. Gnathos composed of two large triangular lobes, narrowly rounded at apex, joined ventrally by a broad band at base, as long as uncus. Tegumen divided from near posterior margin, broadly and uniformly ribbon-like, only slightly narrowed anteriorly. Valva sub-rectangular, with a free distal process; free distal process curved obliquely inward by an acute angle and extending to before middle of costa, narrowed at base, widened medially, again narrowed to pointed apex, with a fine spine at distal 1/4 on ventral margin, with a longer spine at distal 1/3 on dorsal surface extending far beyond apex of distal process, with rowed spines throughout distal 1/3 on dorsal surface. Costa arched, with a short basal thorn pointing inward. Sacculus broad rectangular, slightly narrower than maximum width of valva, with setae distally, sclerotized along dorsal margin. Saccus elongate triangular, approximately 1.6 times length of uncus, pointed at apex. Juxta shorter than saccus; lateral lobes gradually narrowed to pointed apex; basal lobe strong, clubbed, longer than lateral lobes. Aedeagus slender, arched medially, approximately 1.4 times length of vlava; cornutus absent.

Female genitalia ( Fig. 35 ). Apophyses anteriores stout, approximately 1/3 length of apophyses posteriores. Eighth tergite sub-quadrate, shallowly concave at middle on posterior margin. Lamella antevaginalis subtrapezoidal, dentate on posterior margin, produced posterolaterally. Antrum elongate, narrower than ductus bursae. Ductus bursae slightly longer than corpus bursae, curved, with a narrow sclerite medially. Corpus bursae round, granulous; signum nail-like, basal plate large, irregularly shaped, with denticles.

Distribution. China (Guangxi).

Etymology. This epithet is derived from the Latin curvus and taeniatus, referring to the narrow curved sclerite in the female ductus bursae.

Figures

FIGURES 5–10. Adults of Promalactis spp. 5. P. campanulata sp. nov., holotype, ♂; 6. P. tibetica sp. nov., holotype, ♂; 7. P. subquadrata sp. nov., holotype, ♂; 8. P. auremacularis sp. nov., paratype, ♂; 9. P. curvitaeniata sp. nov., paratype, ♀; 10. P. lvovskyi sp. nov., holotype, ♂. Scales =1.0 mm

FIGURES 21–26. Male genitalia of Promalactis spp. 21. P. auremacularis sp. nov., holotype, slide No. MNHU-NK036; 22. P. biprocessa sp. nov., paratype, slide No. JYY17670; 23. P. curvitaeniata sp. nov., holotype, slide No. DZH11058; 24. P. lvovskyi sp. nov., holotype, slide No. TLMF-NK001; 25. P. bicornea sp. nov., holotype, slide No. JYY17533; 26. P. spiniflagellata sp. nov., holotype, slide No. JYY17526. Scales =0.2 mm (not available for No. 21).

FIGURES 32‒36. Female genitalia of Promalactis spp. 32. P. apicidigitata sp. nov., paratype, slide No. JYY17155; 33. P. tibetica sp. nov., paratype, slide No. JYY17568; 34. P. auremacularis sp. nov., paratype, slide No. MNHU-NK042; 35. P. curvitaeniata sp. nov., paratype, slide No. DZH11053; 36. P. lvovskyi sp. nov., paratype, slide No. TLMF-NK002. Scales =0.2 mm (not available for No. 34).