Promalactis stenognatha Wang & Liu 2021, sp. nov.
Creators: name: Wang, Shuxia
name: Liu, Chen
Publisher: name: Zenodo
Year: 2021
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Lepidoptera
Oecophoridae
Promalactis
Promalactis stenognatha

description: Promalactis stenognatha Wang, sp. nov.
(Figs 19, 41, 57)
Type material. CHINA, Yunnan: Holotype ♂, Linjiapu (25.29°N, 98.70°E), Tengchong, 2144 m, 14.VIII.2014, leg. KJ Teng et al., slide No. JYY17593. Paratypes (6♂, 6♀): 1♂, 6♀, same data as holotype, except 14‒16.VIII.2014, slide Nos. HXM14206 ♀, JYY17846 ♀, JYY17847 ♀, LC19775 ♂; 1♂, Nankang, Baoshan, 2009 m, 10.VIII.2014, leg. KJ Teng et al., slide No. JYY17861; 1♂, Nankang, Baoshan, 2009 m, 17.VII.2015, leg. KJ Teng & X Bai; 3♂, Mt. Xiaohei, Longling, 1974 m, 28‒30.VII.2015, leg. KJ Teng & X Bai, slide Nos. JYY17583, JYY17582.
Diagnosis. The new species can be distinguished by its narrow, slightly hooked gnathos, a costa with a large flagellate process, and a valva with two distal lobes curving in opposite directions.
Description. Adult (Fig. 19). Forewing length 5.5‒6.5 mm.
Head: Vertex shiny white, frons greyish brown, occiput dim rust brown. Labial palpus with second palpomere orange yellow, paler on inner surface; third palpomere blackish brown except white at apex. Antenna with scape white; flagellum black, with white annulations on dorsal surface.
Thorax: Dorsum of mesothorax and tegula pale ocherous brown to rust brown. Forewing orange yellow, with blackish brown scales between fold and dorsum; markings white edged with blackish brown scales: costal spot inverted sub-triangular, extending obliquely outward to above posterior angle of cell; basal streak oblique inward to base of fold; antemedian streak from dorsal 1/3 to anterior margin of cell, arched outward medially; dorsal streak from basal 3/5 oblique outward to distal 1/4 of posterior margin of cell; tornal spot blackish brown, narrowed and diffused inward to end of dorsal streak; pretornal spot white, very small; apical spot rounded; two terminal spots smaller than apical spot, weakly separated by black scales; fringe orange yellow except greyish brown around tornus. Hindwing and fringe deep grey. Fore- and midlegs white on ventral surface; dorsal surface black, tibiae with two white stripes, with white scale tufts at apex, tarsi white at apices of basal two tarsomeres; hindleg yellow, tinged with blackish brown on dorsal side, tarsus white except second and third tarsomeres blackish brown at base.
Abdomen: Male genitalia (Fig. 41). Uncus narrowed from base to narrowly rounded apex. Gnathos as long as uncus; mesial plate wide at base, distinctly narrowed and heavily sclerotized to pointed apex distally, slightly curved, with dense denticles; lateral arms wider and shorter than mesial plate. Tegumen furcate from posterior 1/3; lateral arms slightly narrowed to rounded apex. Valva relatively narrow, sub-parallel, with two distal lobes curving in opposite direction, forming a broad U-shape: dorsal lobe slender, extending dorsad, curved, rounded at apex, with a tooth at about middle; ventral lobe narrowed to apex, with an apical spine; costa with a long flagellate process arising from before dorsoapical process, far exceeding apex of dorsoapical process, with a longitudinal patch of long setae distally; sacculus ill-defined. Saccus slightly shorter than uncus, rounded anteriorly. Juxta broad, slightly widened to obtuse apex; basal lobe slender, longer than uncus. Aedeagus longer than valva, slightly curved, triangularly produced and with fine wrinkles distally, with fine denticles apically; cornutus absent.
Female genitalia (Fig. 57). Apophyses posteriores 4 times length of apophyses anteriores. Lamella postvaginalis rectangular, longer than wide, notched at middle on posterior margin; lamella antevaginalis broad, deeply concave at middle on posterior margin, forming rounded posterolateral lobes with sparse setae, lateral margin with denticles along posterior half, concave at posterior 1/3. Antrum cup-shaped. Ductus bursae with basal 2/3 heavily sclerotized, slender, uniform; distal 1/3 broadened, membranous, with a sclerotized narrow coiled belt bearing 1‒2 short spines. Corpus bursae ovate, shorter than ductus bursae; signum an elongate ovate plate with two short denticles.
Distribution. China (Yunnan).
Etymology. The epithet of the new species is derived from the Greek steno- and gnathus, referring to the narrow hooked gnathos.
description: Published as part of Wang, Shuxia & Liu, Chen, 2021, Taxonomic study of the genus Promalactis Meyrick, 1908 (Lepidoptera: Oecophoridae) X. The commotica species-group, with descriptions of twenty-two new species, pp. 293-330 in Zootaxa 4980 (2) on pages 319-320, DOI: 10.11646/zootaxa.4980.2.4, http://zenodo.org/record/4889068