Perissus yangmingae, Xie & Chen & Cui, 2025

Perissus yangmingae sp. nov.

Chinese common name: șẹēź天+

Figs 1 View FIGURE 1 , 2 View FIGURE 2

Description. Holotype, male. Body length 26.2–29.8 mm, humeral width 7.1–7.7 mm. Body black, clothed with greyish yellow pubescence forming a pattern of interspersed grey and black bands on elytra; head, scape, pronotum, basal fourth of elytra, legs and underside clothed with sparse greyish yellow erect hairs.Antennae clothed with rather fine and close pubescence on antennomeres 5–11, slightly lighter in colour towards apex. Pronotum provided with a vague black spot on each side behind middle. Scutellum uniformly clothed with dense greyish yellow pubescence. Elytra mostly clothed with rather sparse greyish yellow pubescence and provided with three remarkable greyish yellow bands of dense pubescence as follows: the first one located before middle, extending forwards along suture to scutellum and slightly expanded transversely after scutellum; the second one located behind middle, irregular and narrows towards outer end; the third one occupies entire apex. Legs and underside clothed uniformly clothed with greyish yellow pubescence.

Frons transverse, with sparse punctures and a deep median sulcus. Antennae robust, reaching about the elytral middle; scape stocky; antennomere 3 longest; antennomere 11 pointed apically. Pronotum about as long as wide, with slightly arcuate sides and slightly constricted base; disc slightly convex, with shallow fine punctures. Scutellum short and broad, rounded apically. Elytra elongate, about three times as long as humeral width; humeri rounded; sides slightly narrowing towards apex; apices narrowly rounded; surface not smooth, finely wrinkled-punctate. Metasternum provided with a prominent and smooth median longitudinal black line. Each abdominal ventrite about equal in length. Pro- and mesolegs shorter than metalegs, femora distinctly swollen into clavate, metatibiae slightly longer than metafemora.

Male terminalia. Tergite VIII clothed with sparse setae and dotted with sparse punctures, with apex concavely truncated ( Fig. 1i, j View FIGURE 1 ). Parameres about one-third as long as tegmen, clothed with several long setae at apex, with a length-to-width ratio of about 4.7. Median lobe moderately curved in lateral view, about as long as tegmen; median struts about 0.7 times as long as median lobe (including median struts); dorsal plate narrowly rounded at apex; ventral plate tapered at apex ( Fig. 1m –o View FIGURE 1 ).

Female. Body length 30.2–33.3 mm, humeral width 7.3–8.5 mm.Very similar to male, but antennae not reaching elytral middle, pronotum less arched at sides, elytra clothed with less pubescence at base and the distal abdominal ventrite narrower.

Material examined. Holotype, male, China, Shanxi Province, Xiangning County (乡÷县), Zaoling Township (ṩü乡), Changjuwan Village (K咀ṉñ), 35° 47’ 05”N, 110° 41’ 10”E, alt. 872 m, 9 April 2024, Ya-Qin Cui leg. GoogleMaps ; Paratype: 4 males 2 females, same data as for holotype. The holotype and paratypes are deposited in the Insect Collection, College of Agriculture, Yangtze University ( YZU) GoogleMaps .

Diagnosis. The new species is most similar to Perissus kankauensis Schwarzer, 1925 but differs in the following aspects: the male antennae only reach the elytral middle, the pronotum lacks coarse granules, the pre-median band of the elytra is distinctly widened in the section extending along the suture after the scutellum, while the postmedian band neither extends forwards along the suture nor connects with the apical band.

Etymology. The new species is named after Ms. Zhou Yang-Ming, first author’s mother.

Remarks. To the best of current knowledge, the only host is Elaeagnus mollis Diels ( Elaeagnaceae , Fig. 2f, g View FIGURE 2 ). Perissus yangmingae sp. nov. causes damage to branches and trunk, their larvae boring into stems and adults fed on the bark of young shoots ( Fig. 2d, e View FIGURE 2 ). The earliest emergence of adults has been observed in early April.