Promalactis bomiensis 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 : 45-47

Promalactis bomiensis Wang , sp. nov.

( Figs 8 , 26 , 39 )

Type material. CHINA, Tibet: Holotype ♂ , Tongmai Town (30.10°N, 95.08°E), Bomi County, 2029 m, 13.VIII.2018, leg. MJ Qi, slide No. LC19226 . Paratypes: 4♂, 3♀, 12–16.VIII.2018, other data same as holotype, slide Nos. LC19225 ♀, LC19425 ♂.

Diagnosis. The new species can be distinguished from its congeners in the male genitalia by the valva having a small spine-like apical process, and the juxta with lateral arm asymmetrically bilobed distally. It is similar to P. fasciserrata sp. nov. in female genitalia, and the differences between them are given in the diagnosis of the latter species.

Description. Adult ( Fig. 8 ). Wingspan 9.0–11.0 mm. Head dark brown. Labial palpus with second segment black on outer surface, dark grey on inner surface; third segment black except white basally and apically. Antenna with scape white on dorsal surface, grey on ventral surface; flagellum black, alternated with white on dorsal surface. Thorax and tegula dark grey. Forewing ochreous brown; markings white edged with black scales: costal spot sub-triangular, placed beyond basal 3/5, extending to anterior angle of cell; cell with a slender streak from basal 1/4 extending outward; fold with a dot at base, with a larger spot and a short stripe at middle and distal 1/4 respectively; dorsum with three streaks: first streak at base, straight to base of fold, meeting dot at base of fold; second streak from basal 2/5 oblique outward to distal 1/4 of fold, meeting spot at middle of fold; third streak from basal 3/5 oblique outward to distal 1/4 of fold; apical spot ovate, with dense black scales diffused from inner margin to costal margin; terminal spot placed between apex and tornus; tornus with diffused black and grey scales, tinged with white scales centrally; cilia ochreous brown. Hindwing and cilia grey. Fore- and midlegs black, fore femur and midleg pale grey ventrally, tibiae with a white dot at base and middle respectively, with a tuft of white scales apically, tarsi white at apices of basal two tarsomeres; hindleg yellowish brown ventrally, greyish black dorsally, tarsus white at apices of basal four tarsomeres and on entire apical tarsomere.

Male genitalia ( Fig. 26 ). Uncus campaniform, wide at base, narrowed to basal 3/5, then uniformly narrow to obtuse apex. Gnathos shorter than uncus; mesial plate narrowly lingulate, with scale-like protuberances, with a large membranous apical process; basal arm shorter than mesial plate. Tegumen branched from posterior 1/4; lateral arm narrowed triangularly to apex. Valva elongate, wide at base, narrowed to about middle, then nearly uniform to rounded apex, with a small spine-like apical process; costa concave near base, serrate distally; sacculus wide at base, narrowed to middle, setose distally. Saccus shorter than uncus, wide at base, narrowed to apex. Juxta with lateral arm widened to middle, uniform from middle to asymmetrically bilobed apex: inner lobe extremely slender and long, reaching before middle of uncus, outer lobe spine-shaped, very short; basal lobe short, as long as outer lobe. Aedeagus straight, about same length as valva; with two cornuti: one basally slender, distally consisting of several spines of unequal length, the other one spine-shaped, placed distally.

Female genitalia ( Fig. 39 ). Apophyses anteriores about half length of apophyses posteriores. Eighth sternum sub-rectangular; posterior margin rounded, concave at middle, with spicules. Ostium bursae large, concave circularly on posterior margin, posterolaterally produced to a triangular process bearing several strong apical spines; lateral margin produced outward medially, with a uniformly narrow band extending from above middle to anterior margin of seventh sternum, serrate along outer margin. Antrum narrow basally, widened anteriorly. Ductus bursae membranous, wider than antrum, with several spines near antrum. Corpus bursae rounded, with granules; with two ovate signa, each bearing dense denticles.

Distribution. China (Tibet).

Etymology. The specific epithet of this new species is derived from the type locality, Bomi County, Tibet.

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 25‒30. Male genitalia of Promalactis spp. 25, P. plicata, holotype, slide No. JYY17788; 26, P. bomiensis, holotype, slide No. LC19226, 26a, enlarged cornutus; 27, P. brevipalpa, holotype, slide No. DZH12288, 27a, enlarged cornutus; 28, P. libona, holotype, slide No. JYY17787, 28a, enlarged cornutus; 29, P. medilargissima, holotype, slide No. LC19307, 29a, enlarged cornutus; 30, P. ramivalvata, paratype, slide No. DZH10184. Scales = 0.2 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.