Promalactis shengtangshana Min & Li & Wang 2026, sp. nov.
Year: 2026
Type: article
Abstract: Promalactis shengtangshana Wang sp. nov. (Figs 5, 11, 14) Type material. Holotype ♂, CHINA, Guangxi: Mt. Shengtang, Dayaoshan National Nature Reserve, Jinxiu County (23.97ºN, 110.11ºE), 1195 m, 22.VII.2022, leg. H Sun, ZX Xu and D Zhang, slide No. MQY25620. Paratypes: 4♂ 3♀, 21–22.VII.2022, other same data as holotype, slide Nos. MQY25621 ♀, MQY25659 ♂, MQY25660 ♀, MQY25661 ♀, MQY25662 ♂, MQY25663 ♂. Diagnosis. The new species is similar to P. quinilineata Wang, Kendrick & Sterling, 2009. It can be distinguished from P. quinilineata in the male genitalia by the lateral lobes of the juxta without processes, and the phallus with a triangular preapical process and without a sclerotized apical thorn; in the female genitalia by the ostium bursae without a band arising from the anterolateral corner. In P. quinilineata, the lateral lobes of the juxta have an apexpointed process arising from the base, and the phallus lacks a preapical process and possesses a sclerotized apical thorn; in the female genitalia, the ostium bursae has a wide serrate band arising from the anterolateral corner. The new species is also similar to P. similiquinilineata sp. nov. It can be distinguished in the male genitalia by the lateral lobes of the juxta without lateral processes, and the phallus with a triangular process at distal 1/3 dorsally. In P. similiquinilineata sp. nov., the lateral lobes of the juxta have asymmetrical lateral processes, and the phallus possesses a small triangular plate near the apex. Slight differences lie in the female genitalia of the two species: in P. shengtangshana sp. nov., the lamella postvaginalis is shallowly concave at the middle on the posterior margin, the lamella antevaginalis is subquadrate, and the antrum bears a wider, more heavily sclerotized band laterally; whereas in P. similiquinilineata sp. nov., the lamella postvaginalis is rounded on the posterior margin, the lamella antevaginalis is subrectangular, and the antrum has a narrower, weakly sclerotized band laterally. Description. Adult (Fig. 5) with wingspan 7.0–8.0 mm. Head. Vertex and frons pale yellow, occiput deep brown. Labial palpus with second segment pale yellow except black in basal 2/3 on both ventral and outer surface; third segment black except pale yellow in basal 1/3 on inner surface, pale yellow except black in distal 1/3 on outer surface. Antenna with scape yellow; flagellum black alternating with yellow dorsally, deep brown ventrally. Thorax. Mesonotum black, tegula black in basal half, yellow in distal half. Forewing golden yellow; costal margin with three large black patches: basal patch subrectangular, extending obliquely outward to above fold, edged with a white line on outer margin extending to cell; median patch subtriangular, edged with a white line on outer margin extending to posterior angle of cell; distal patch subtriangular; fold with a small white spot at base; dorsum with a black mixed with golden yellow stripe from near base obliquely inward to base of fold, with two white streaks running respectively from basal 1/4 and 3/4, parallel and oblique outward, edged with dense black scales along their inner margins, first streak meeting white line from outer margin of basal patch; apex with a small white dot; termen with black scales, forming a black band, with a white dot at middle; fringe golden yellow except greyish black on extension of distal patch and around tornus. Hindwing and fringe grey. Abdomen. Male genitalia (Fig. 11) with uncus wide at base, slightly narrowed to middle, distal 1/2 uniformly slender to rounded apex. Gnathos about 3/4 length of uncus; wide at base, slightly narrowed to basal 2/3, distal 1/3 parallel and squamous, with an extremely short, papillate membranous process arising from before apex of ventral surface. Tegumen furcate from posterior 1/3, laterally narrowed to anterior end. Valva subrectangular, bilobed distally: costal process subtriangular, setose, pointed at apex; ventral process being a large, upcurved spine, very strong; sacculus parallel, reaching before base of ventral lobe of valva, setose distally. Juxta reaching near base of gnathos; lateral lobe very strong, narrowed toward apex, basal 1/4 enlarged; basal lobe reaching 3/5 length of saccus. Saccus longer than uncus, subparallel to before rounded apex. Phallus about 2.5 times length of saccus, tubular, dorsally with a large, strongly sclerotized, triangular process at distal 1/3; cornutus slender, about 1/4 length of phallus. Female genitalia (Fig. 14) with apophyses anteriores 1/2 length of apophyses posteriores. Lamella postvaginalis being a short plate, shallowly concave at middle on posterior margin. Lamella antevaginalis subquadrate. Antrum subquadrate, with heavily sclerotized narrow band laterally. Ductus bursae approximately 1.5 times length of corpus bursae, with a subrectangular plate below antrum, which bears large spines on its posterior margin, a large spine in its middle, a circle of small spines from its anterior margin extending backward to posterior 2/5 of antrum and then coming downward to posterior margin of subrectangular plate. Corpus bursae ovate, membranous; signum absent. Distribution. China (Guangxi). Etymology. The specific epithet of this new species is from the type locality, Mt. Shengtang, Guangxi Zhuang Autonomous Region.
Authors: Min, Qiuyue, Li, Houhun, Wang, Shuxia
Institutions: Kashi University, Nankai University
Language: English
Subfield: Insect Science
Domain: Life Sciences
Open Access status: green
OpenAlex ID: W7204184699