Promalactis apicuncata Wang, 2018

Promalactis apicuncata Wang View in CoL , sp. nov.

( Figs 4 View FIGURES 1–8 , 12 View FIGURES 9–14 , 16 View FIGURES 15–19 )

Type material. CAMBODIA: Holotype ♂, Seima ( 12°14'54'' N, 107°03'15''E), Keo Seima Wildlife Sanctuary , Mondulkiri Province, 16.VIII.2013, coll. Bae Y.S. et al., slide No. INU-NK15159 GoogleMaps . Paratypes: 1♂, same data as holotype, slide No. W17011 ( NKU) GoogleMaps ; 2♂, 1♀, 9−12.XI.2011, slide Nos. INU-NK15093 ♂, INU-NK15165 ♀, coll. Bae Y.S. et al., other same data as holotype GoogleMaps ; 1♂, Samkos (12°12'40.4 3'' N, 102°53'42.38''E), Pursat Province, 830 m, 6.II.2015, coll. Bae Y.S. et al., slide No. INU-NK15136.

Diagnosis. This new species is characterized by the forewing having an inverted irregular V-shaped tornal spot. It can be distinguished from the similar-looking species by the valva with two large ventroapical spines hooked dorsad, and with a large semicircular protuberance beyond the middle of the costa.

Description. Adult ( Fig. 4 View FIGURES 1–8 ) wingspan 8.5−9.0mm. Head with vertex snowy white, frons silvery gray, occiput pale reddish brown. Labial palpus with second segment yellow to brownish yellow; third segment blackish brown except white at apex. Antenna with scape white; flagellum black, dorsal surface white on basal several flagellomeres, alternated with white on remaining flagellomeres. Thorax and tegula pale reddish brown. Forewing yellow, markings white edged with black scales: basal fascia from base of fold obliquely straight outward; antemedian fascia wider, sub-parallel with basal fascia, arched outward slightly, reaching upper margin of cell; costal spot sub-rectangular, slightly narrowed posteriorly, extending from distal 2/5 obliquely outward, crossing upper corner of cell ventrally; tornal spot irregularly inverted V shaped, its outer arm large, inner arm shorter and slenderer; apical spot round; two pre-apical spots placed on termen, much smaller than apical spot; cilia yellow except gray around tornus. Hindwing and cilia deep gray. Fore- and midlegs black, fore tibia with two white dots and a small apical tuft of white scales, mid tibia with a white tuft of long scales, fore and mid tarsi white at apices of first and second tarsomeres counting from base; hindleg whitish yellow on ventral side, grayish brown on dorsal side except tarsus whitish yellow at apex of each tarsomere.

Male genitalia ( Fig. 12 View FIGURES 9–14 ): Uncus wide basally, narrowed distally, rounded apically. Gnathos strong, longer than uncus, trapezoidal, straight apically. Tegumen divided from about posterior 1/4, narrowed anteriorly to rounded apex, sclerotized along edges. Valva wide at base, slightly narrowed to apex; costa concave before middle, with a large semicircular protuberance from beyond middle to before apex; ventral area setose from end of sacculus to apex, produced to two large ventroapical spines hooked dorsad. Sacculus wide at base, slightly narrowed to 2/3 of ventral margin of valva. Saccus shorter than uncus, broad triangular, rounded at apex. Juxta sub-rounded; lateral lobe slender, with sparse setae. Aedeagus stout, almost as long as valva, with wrinkles distally; cornutus large, slightly shorter than half length of aedeagus, its basal 2/3 rhombic, distal 1/3 slender, with strong spines.

Female genitalia ( Fig. 16 View FIGURES 15–19 ): Apophyses posteriores approximately twice as long as apophyses anteriores. Sternum quadrate, with fine setae on posterior margin; tergum large, rounded on posterior margin. Ostium bursae large and rounded. Antrum strong, almost uniform. Ductus bursae membranous, coiled medially, with a wide banded sclerite extending from antrum to corpus bursae. Corpus bursae elongate ovate, granulous, with two sclerotized sub-rectangular plates of granules; signum being a large rectangular plate with granules and denticles.

Distribution. Cambodia ( Mondulkiri, Pursat).

Etymology. The specific epithet is derived from the Latin apex and uncatus (hooked), referring to the hooked ventroapical spines of the valva.