Promalactis abasiloba Wang, 2020

Liu, Chen & Wang, Shuxia, 2020, Genus Promalactis Meyrick, 1908 (Lepidoptera: Oecophoridae) from Malaysia with description of three new species, Zootaxa 4755 (1) : -

Promalactis abasiloba Wang , sp. nov.

( Figs. 3, 6 )

Type material. Holotype ♂, Mt. Trusmadi (5.44°N, 116.45°E), Sabah, Malaysia, 1223 m, 10.V.2019, coll. S Yu, slide No. LC 19284 . Paratypes: 2 ♂, 11‒12.V.2019, other the data same as for holotype, slide No. LC 19126 ; 1 ♂, 11.II.2018, coll. MJ Qi, other data the same as for holotype, slide No. JYY17627 .

Diagnosis. This new species can be distinguished from its congeners by the forewing having a large grey costal and tornal patches, and in the male genitalia by the costa concave dorsally at subapical area and widened elliptically ventrad, and the juxta obtusely widened anteriorly.

Description. Adult ( Fig. 3 ). Wingspan 9.0‒ 10.5 mm.

Head with frons snowy white, vertex blackish brown; occiput brown, with a row of white scales horizontally. Labial palpus with second segment brown except white at apex; third segment white, with wide black annulation at base, at basal 2/5 and before apex respectively. Antenna black, scape snowy white at base and apex, flagellum annulated with white. Thorax and tegula brown; tegula yellowish brown distally. Forewing ocherous brown from base to basal 3/4, distal 1/4 ocherous yellow; costal patch at distal 1/4, large inverted trapezoidal, silvery grey, its anterior and outer margins with dense black scales, inner margin with two white dots (sometimes connected to one spot); apical spot white, its inner margin with black scales forming a diffused spot; tornal spot silvery grey, with black scales; six white markings with blueish metallic shinning, edged with black scales: cell with a dot at base, fold with a stripe at about basal 1/3 and 2/3 respectively, dorsum with stripe at base, at basal 1/3 and basal 3/5 respectively, second one inverted L shaped; cilia pale ocherous yellow. Hindwing and cilia greyish brown. Fore- and midlegs with dorsal side white; ventral side black, fore tibia with white dot at middle and with small white tuft at apex, fore- and mid tarsi white at apices of basal, second and distal tarsomeres; hindleg whitish yellow ventrally, greyish brown dorsally except tarsus dirty white at apex of each tarsomere.

Male genitalia ( Fig. 6 ). Uncus wide at base, narrowed to pointed apex, arched dorsad from anterior margin to middle on ventral surface, sclerotized with setae laterally. Gnathos as long as uncus; gnathos plate narrow lingulate, scaly distally, rounded apically; lateral arm shorter, widely banded. Tegumen bifurcate from posterior 2/5, then slightly narrowed to rounded apex. Valva broad, basal 3/4 subparallel, slightly narrowed from distal 1/4 to apex; costa sickle-shaped as a whole, basal 2/3 uniformly narrow, arched, widened ventrad from distal 1/4 to preapex, then narrowed again to narrowly rounded apex, setose, concave at preapex dorsally. Sacculus with basal 3/5 uniform, narrowed from basal 3/5 to 4/5, then curved upward and narrowed to pointed apex. Saccus shorter than uncus, wide at base, narrowed to about middle, sharply narrowed from middle to pointed apex. Juxta longer than hight of tegumen, widened and produced outward basally, narrowed near base, widened from near base to about basal 3/7; distal 4/7 furcate, lateral arm strong, slightly widened medially, sharply narrowed from preapex to pointed apex. Aedeagus as long as valva, curved; cornutus being a short spine, about 1/6 length of aedeagus.

Female unknown.

Distribution. Malaysia.

Etymology. The specific epithet of this new species is derived from the Latin a-, basi - and lobus, referring to the absence of the juxta basal lobe.

Figures

FIGURES 2‒7. Promalactis spp. 2‒4. Adults of Promalactis spp.: 2, P. clavivalvata, holotype, ♂; 3, P. abasiloba, holotype, ♂; 4, P. trusmadiensis, holotype, ♂. 5‒7. Male genitalia of Promalactis spp.: 5, P. clavivalvata, holotype, slide No. LC19142; 6, P. abasiloba, paratype, slide No. LC19126; 7, P. trusmadiensis, holotype, slide No. JYY17908. Scales: 1‒3 = 2.0 mm, 4‒6 = 0.2 mm.