Promalactis argentifasciaria Wang, 2018

Jia, Yanyan, Wang, Shuxia & Bae, Yang-Seop, 2018, The genus Promalactis Meyrick (Lepidoptera: Oecophoridae) in Cambodia, with description of eight new species, Zootaxa 4422 (1), pp. 104-114 : 111-112

Promalactis argentifasciaria Wang , sp. nov.

( Figs 6 , 14 )

Type material. CAMBODIA: Holotype ♂, Samkos (12°12'40.43''N, 102°53'42.38''E), Central Cardamom Mountains , Pursat Province, 23.XII.2014, coll., Bae Y.S. et al., slide No. INU-NK15162 . Paratypes: 1♂, same data as holotype, slide No . W17012 ( NKU); 1♂, Kohkong (11°41'44.9''N, 103°06'51.8''E), Cardamom Mountains , Kohkong Province, 25.XII.2014, coll. Bae Y.S. et al., slide No. INU-NK15140.

Diagnosis. This new species can be easily distinguished from its allies by having two silvery fasciae on the forewing, and the asymmetrical valva with large weakly sclerotized asymmetrical ventral process in the male genitalia.

Description. Adult ( Fig. 6 ) wingspan 7.5 mm. Head with vertex cream white, frons grayish brown. Labial palpus with second segment brown, third segment white except black distally. Antenna white, flagellum annulated with black on dorsal surface. Thorax and tegula ocherous brown. Forewing ocherous yellow, with two silvery fasciae edged with black scales: antemedian fascia broad, from between basal 1/3 and 1/2 of costal margin extending straightly to dorsum, widened anteriorly; postmedian fascia from between distal 1/3 and 1/6 obliquely inward to tornus, narrowed at about lower corner of cell, sinuate laterally, extending along dorsum to median fascia, forming a large U shaped pattern; apical spot narrow, from apex extending along termen to beyond tornus where it meets postmedian fascia; cilia orange yellow except gray around tornus. Hindwing and cilia gray. Fore- and midlegs with ventral side yellowish white, dorsal side black, tarsi white at apices of first and second tarsomeres; hindleg whitish yellow, with brownish gray hairs on tibia, tarsus whitish gray.

Male genitalia ( Fig. 14 ): Uncus large, wide basally, narrowed to hooked apex. Gnathos invisible. Tegumen sub-trapezoidal, deeply concave on anterior margin. Valva asymmetrical: left valva narrow at base, widened gradually to basal 2/5, then narrowed to apex, with two large and several small spines distally, protruding roundly at dorsal 2/5; large and clubbed process at dorsal 2/5 arising from ventral side, with strong setae, its apex rounded, not exceeding apex of valva. Right valva rhomboid, densely setose along costa, with two strong spines and dense denticles distally; large, sub-rectangular, weakly sclerotized process from ventral side, with long setae along dorsal margin, with a tuft of fine setae at approximately distal 1/3, apex obtuse, exceeding apex of valva. Saccus shorter than uncus, triangular, narrowly rounded at apex. Juxta shorter than uncus, broadly banded and arched. Aedeagus nearly as long as valva, dilated slightly at base; cornutus indistinct.

Female unknown.

Distribution. Cambodia (Kohkong, Pursat).

Etymology. The specific epithet is derived from the Latin argentum (silver) and fasciarius (fascia), referring to the two silvery fasciae on the forewing.

Figures

FIGURES 1–8 Adults of Promalactis spp. 1. P. latiuscula sp. nov., holotype ♂; 2. P. curvicornuta sp. nov., holotype ♂; 3. P. ostacantha sp. nov., holotype ♂; 4. P. apicuncata sp. nov., holotype ♂; 5. P. granulosa sp. nov., holotype ♂; 6. P. argentifasciaria sp. nov., holotype ♂; 7. P. quadrilobata sp. nov., holotype ♀; 8. P. trifasciata sp. nov., holotype ♀. Scale bars =1.0 mm.

FIGURES 9–14 Male genitalia of Promalactis spp. 9. P. latiuscula sp. nov., holotype, slide No. INU-NK15147; 10. P. curvicornuta sp. nov., holotype, slide No. INU-NK15133; 11. P. ostacantha sp. nov., holotype, slide No. INU-NK15113; 12. P. apicuncata sp. nov., holotype, slide No. INU-NK15159; 13. P. granulosa sp. nov., holotype, INU-NK15117; 14. P. argentifasciaria sp. nov., holotype, slide No. INU-NK15162. Scale bars = 0.2 mm.