Phloeotrinus elongatus, Yang & Zeng, 2025

Phloeotrinus elongatus sp. nov.

Fig. 6 View Figure 6

Material examined.

Holotype: • “ June 9, 2019 / China, Guizhou Province, Leishan County, Queniao Village / Flight Intercept Trap # 6 / leg. Shulin Yang ”. 26°23.79'N, 108°13.32'E, 1 ♂, LS 19-0437 . GoogleMaps

Diagnosis.

This new species can be distinguished from congeners by characteristics of head, pronotum and male genitalia. The head of Phloeotrinus elongatus sp. nov. is not sulcate longitudinally. Head is sulcate medially in P. femoralis Lewis, 1895 and P. filiformis (Marseul, 1876) . Tibiae are not bicoloured in P. elongatus sp. nov., while apexes of tibiae are orange in P. femoralis . There is a narrow median furrow on the basal 3 / 4 of pronotum in P. elongatus sp. nov., while the pronotum is not furrowed in P. minusculus (Nomura, 1962) . Compared to characteristics of male genitalia of P. femoralis , P. filiformis , and P. minusculus , as illustrated by Toyoshima and Ishikawa (2000), the parameres are constricted before the apex in P. femoralis and P. filiformis , while the parameres are not constricted in P. elongatus sp. nov. Although the parameres are also not constricted before the apex in P. minusculus , the median lobe is longer than the parameres in P. minusculus but subequal in P. elongatus sp. nov.

Description.

Male (Fig. 6 View Figure 6 ), body elongate, length 9.0 mm (anterior margin of the epistoma to the apices of elytra), width 2.0 mm (widest at elytra after humeri); head, thorax elytra, and tibiae black, maxillary palpi, labrum, anteclypeus, scape, apex of antennomere 2, coxae, femur and abdominal ventrites yellow to dark brown; body densely and finely punctate with pale hairs. Head (Fig. 6 b View Figure 6 ) about as long as wide; apex of labrum slightly concave in the middle; terminal maxillary palpomere securiform, longer than palpomere 3, about half as long as palpomere 2; frons with dense hairs; eyes large, slightly emarginate anteriorly; antenna short, not reaching middle of elytra, black except scape and apex of antennomere 2, slightly widened apically from antennomeres 3–10; antennomere 11 pointed; ratios of antennomeres 1: 0.49: 0.79: 0.75: 0.75: 0.81: 0.75: 0.72: 0.67: 0.62: 0.78. Thorax. Pronotum 1.8 mm long, widest at base, 2.0 mm, rounded apically; base slightly bisinuate; disc with a weak, longitudinal, glossy groove from base to about apical 1 / 4; scutellum subquadrate, raised above elytra, with dense hairs on sides. Elytra black, as wide as pronotum at humeri, transversely depressed at base; parallel-sided to apical 1 / 4, then tapering towards apices, rounded apically. Legs slender, femur yellowish orange; tarsomeres 1–3 of pro-tarsi expanded; tarsomere 4 bilobed underside; outer sides of meso- and meta-tibiae with transverse rows of bristles; prosternal process short (Fig. 6 c View Figure 6 ), widely rounded; mesosternal process long, triangular, rounded apically. Abdomen (Fig. 6 c View Figure 6 ) dark brown, with dense, pale hairs. Genitalia (Fig. 6 d, e View Figure 6 ). Parameres not constricted at base, sides parallel, widely tapering and pointed apically. Female unknown.

Etymology.

The specific name refers to its elongate body. Latin, elongata (elongate); an adjective.

Collection circumstances.

Same locality and habitat as P. similis sp. nov., as given above.

Distribution.

China: Guizhou Province: Leishan County: Mount Leigong.