Promalactis fasciserrata Wang, 2020

Wang, Shuxia & Liu, Chen, 2020, Taxonomic study of the genus Promalactis Meyrick, 1908 (Lepidoptera: Oecophoridae) IX. The maculosa species-group, with descriptions of eighteen new species, Zootaxa 4890 (1), pp. 38-66 : 47

Promalactis fasciserrata Wang , sp. nov

( Figs 9 , 40 )

Type material. CHINA, Tibet: Holotype ♀, 80K (29.66°N, 95.49°E), Motuo County, 2089 m, 19.VIII.2017, leg. MJ Qi & XF Yang, slide No. JYY17767 . Paratypes: 1♀, same data as holotype ; 3♀, 80K, Motuo County, 2076 m, 6–9.VIII.2018, leg. MJ Qi, slide No. LC19209 .

Diagnosis. The new species is similar to P. bomiensis sp. nov. in appearance and in female genitalia. It can be distinguished by the ostium bursae concave in a broad U-shape on the posterior margin, produced outward at anterior 1/3 of lateral margin, and the antrum slightly narrower anteriorly; in P. bomiensis , the ostium bursae is concave circularly on the posterior margin, produced outward lateromedially, and the antrum is widened anteriorly.

Description. Adult ( Fig. 9 ). Wingspan 11.0–12.0 mm. Head dark brown. Labial palpus with second segment black on outer surface, greyish black on inner surface; third segment black except basal 1/3 and apex white. Antenna with scape white except black apically on dorsal surface, pale grey on ventral surface; flagellum black annulated with white dorsally, dark brown ventrally. Thorax and tegula dark brown. Forewing dark ocherous brown; an ocherous yellow band as wide as 1/4 width of wing running from base to basal 1/3 along costal area, an ill-defined longitudinal median stripe extending from posterior corner of preceding band straightly to before apex; markings white edged with black scales: costal spot placed beyond middle, large, narrowed obliquely outward, touching longitudinal median stripe posteriorly, with blackish grey patch on inner and outer margins anteriorly; fold with a slim streak at base, a round spot at middle, a short stripe at distal 1/4; cell with a stripe from basal 1/4 extending outward, arched to above middle of fold, connected with spot at middle of fold, interrupted by black scales medially; dorsum with three streaks: first streak from near base straightly inward to below fold, second streak from basal 2/5 oblique outward to basal 1/3 of fold, third streak from basal 2/3 oblique outward to distal 1/3 of fold; apical spot ovate, with dense black scales from inner margin diffused to costal margin; terminal spot placed between apex and tornus, smaller than apical spot; tornus with diffused black and grey scales, tinged with white scales centrally; cilia ochreous yellow except brown on extension of tornus. Hindwing and cilia greyish brown. Fore- and midlegs brownish grey ventrally, black dorsally, tibiae with a white spot at base and middle respectively, with a cluster of white scales at apex, tarsi white at apices of basal two tarsomeres; hindleg yellowish brown ventrally, greyish black dorsally, tarsus white at apex of each tarsomere.

Male unknown.

Female genitalia ( Fig. 40 ). Apophyses anteriores shorter than half length of apophyses posteriores. Eighth sternum with posterior margin rounded, narrowly concave at middle, setose. Ostium bursae large, concave in broad U-shape on posterior margin, produced to a triangular process posterolaterally, dentate on posterior and lateral margins; lateral margin with a uniformly narrow band extending from posterior 1/3 to anterior margin of seventh sternum, serrate along outer margin, with a triangular process at anterior 1/3. Antrum with posterior half uniformly wide, anterior half slightly narrower. Ductus bursae membranous, wider than antrum, with several spines near antrum. Corpus bursae rounded, with two ovate signa, each signum bearing dense denticles.

Distribution. China (Tibet).

Etymology. The specific epithet of the new species is derived from the Latin fascea and serratus, referring to the serrate band on the lateral margin of the ostium bursae.

Figures

FIGURES 7‒12.Adults of Promalactis spp. 7, P. plicata, holotype, ♂; 8, P. bomiensis, paratype, ♂; 9, P. fasciserrata, holotype, ♀; 10, P. brevipalpa, holotype, ♂; 11, P. libona, holotype, ♂; 12, P. medilargissima, holotype, ♂. Scales = 2 mm.

FIGURES 36‒41. Female genitalia of Promalactis spp. 36, P. coloristigmosa, paratype, slide No. LC19222; 37, P. cruciate, paratype, slide No. HXM14250; 38, P. lonchodes, paratype, slide No. JYY17727; 39, P. bomiensis, paratype, slide No. LC19306; 40, P. fasciserrata, holotype, slide No. JYY17767; 41, P. brevipalpa, paratype, slide No. HXM13120, 41a, enlarged ductus bursae. Scales = 0.2 mm.