Promalactis magnisaccata Wang & Liu & David 2024, sp. nov.
Creators: name: Wang, Shuxia
name: Liu, Chen
name: David, Lees
Publisher: name: Zenodo
Year: 2024
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Lepidoptera
Oecophoridae
Promalactis
Promalactis magnisaccata

description: Promalactis magnisaccata Wang, sp. nov.
(Figs 24, 57)
Type material. Thailand: Holotype ♂, Khao Yai NP, Park HQ, 720 m, 2–4.XI.1988, leg. J.D. Bradley, Angoon Lewvanich & D.S. Fletcher, slide No. NHMUK010317008.
Diagnosis. The new species can be distinguished from the other species of the group by the strong thumb-shaped mesial plate of the gnathos, the valva densely setose in distal 3/5 and without distinct sacculus, and the large broad saccus basally wider than the maximum width of the valva.
Description. Adult (Fig. 24). Forewing length 4.0 mm.
Head. Vertex snowy white, frons dark grey, occiput black. Labial palpus with second segment black on outer surface, greyish brown on inner surface; third segment black, except white at apex on inner surface. Antennal scape snowy white dorsally, pale grey ventrally; flagellum black, alternating with white dorsally except basal three flagellomeres white.
Thorax. Mesonotum and tegula rust brown. Forewing brownish yellow; markings white edged with black scales: costal spot sub-ovate, extending from distal 2/5 obliquely outward and crossing anterior angle of cell; basal streak from dorsum oblique inward to above base of fold; antemedian streak from basal 3/5 of dorsum to basal 2/5 of anterior margin of cell, parallel with basal streak; dorsal streak from distal 1/5 of dorsum oblique outward to posterior angle of cell; tornal streak oblique inward, meeting dorsal streak, forming an arched speckle; apical spot rounded; termen with indistinct small dot below apical spot, with denser black scales; fringe orange yellow except grey around tornus. Hindwing and fringe grey. Foreleg black except femur white dorsally, tibia with white spot at base and middle, with a tuft of white scales apically, tarsus white at apices of basal two tarsomeres; midleg black except femur brown, tibia with a white spot at base, with a tuft of white scales at apex, tarsus white at apices of basal two and apical tarsomeres; hindleg yellow ventrally, black dorsally, tarsus white at apices of basal four tarsomeres and on entire apical tarsomere.
Male genitalia (Fig. 57). Uncus represented by two small setose lobes. Gnathos with mesial plate elongate, strongly thumb-shaped, slightly dilated before rounded apex; basal arm longer than mesial plate. Tegumen arched mediolaterally, with a shallow anterior emargination. Valva narrow at base, slightly widened to obtusely rounded apex, densely setose in distal 3/5. Saccus large, broad triangular, narrowed to rounded apex, basal width wider than maximum width of valva. Juxta short, narrowly clubbed, with three short apical spines. Phallus slender, about 3 times length of valva; cornutus slender, approx. 1/4 length of phallus, placed distally.
Female unknown.
Distribution. Thailand.
Etymology. The specific epithet is derived from the Latin magni- and saccatus, referring to the large saccus of the male genitalia.
description: Published as part of Wang, Shuxia, Liu, Chen & David, Lees, 2024, Partial revision of Promalactis Meyrick (Lepidoptera: Oecophoridae), based on specimens deposited in the Natural History Museum, London, pp. 1-58 in Zootaxa 5536 (1) on pages 24-25, DOI: 10.11646/zootaxa.5536.1.1, http://zenodo.org/record/14023827