Promalactis latiuscula 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 : 104-105

Promalactis latiuscula Wang , sp. nov.

( Figs 1 , 9 )

Type material. CAMBODIA: Holotype ♂, Samkos (12°12'40.43''N, 102°53'42.38''E), Central Cardamom Mountains , Pursat Province, 647 m, 7.II.2015, coll. Bae Y.S. et al., slide No. INU-NK15147.

Diagnosis. This new species is similar to P. thiasitis Meyrick, 1908 and P. javana Lvovsky, 2000 in the forewing having a white pre-tornal stripe extending from before the end of fold to below the costal spot. It can be easily distinguished from P. thiasitis by the basal and antemedian fasciae reaching the costal margin, whereas they reach vein Sc in the latter species. It can be distinguished from P. javana in the male genitalia by the valva narrowed from base to basal 3/5, and distal 2/5 produced to a dorso-apical process that is narrowed to a point and a stout clubbed ventro-apical process that is thicker and longer than the dorso-apical process; in P. javana , the valva is widened to before apex, and its dorso-apical process is slender and almost uniform, and the ventro-apical process is produced sharply to a point.

Description. Adult ( Fig. 1 ) wingspan 6.5 mm. Head white, occiput yellowish brown. Labial palpus with first and second segments yellow, tinged with black scales at apex of second segment; third segment with basal 1/3 white, distal 2/3 black, tinged with white before apex. Antenna with scape white; flagellum blackish brown, alternated with cream white dorsally. Thorax and tegula yellow. Forewing yellow, mixed with blackish brown and silvery scales distally, with dense gray scales on tornal area; markings white edged with black scales: both basal and antemedian fasciae reaching costal margin, antemedian fascia wider and medially arched outward; costal spot at basal 3/5, sub-rounded, crossing middle of wing ventrally; pre-tornal stripe as long as costal spot; apical spot irregular in shape; pre-apical dot beyond tornus, represented by a few white scales; cilia yellow. Hindwing and cilia light grayish brown. Fore- and midlegs white, with black marks; hindleg gray, white at apices of first and second tarsomeres.

Male genitalia ( Fig. 9 ). Uncus campanulate, basal 1/3 wide and parallel, median 1/3 gradually narrowed, distal 1/3 uniformly slender, obtuse at apex. Gnathos widely banded, spatulate ventrally, shorter than uncus. Tegumen divided from middle, anteriorly narrowed to rounded apex, heavily sclerotized along edges. Valva broad at base, narrowed to basal 2/3, distal 1/3 furcate, forming two processes: dorsal process gradually narrowed to pointed apex, shorter than ventral process; ventral process stout, clubbed, densely setose distally, rounded apically. Sacculus wide at base, narrowed to end, reaching 1/2 length of ventral margin of valva. Saccus longer than uncus, wide, distal 1/4 distinctly narrowed to apex. Juxta single lobed, relatively wider, nearly as wide as saccus, longer than uncus plus gnathos, medially widened, slightly narrowed to rounded apex distally, not reaching base of uncus apically, with a pre-apical seta; basal lobe slender, reaching before apex of saccus. Aedeagus slightly longer than valva, almost uniform; cornutus slender, hooked, placed distally.

Female unknown.

Distribution. Cambodia (Pursat).

Etymology. The epithetic name is derived from the Latin latiusculus (wider), referring to the relatively wide juxta.

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.