Melandrya bifasciata, Yang & Zeng, 2025

Melandrya bifasciata sp. nov.

Fig. 5 View Figure 5

Material examined.

Holotype: • “ May 5, 2019 / China, Guizhou Province, Leishan County, Queniao Village / Flight Intercept Trap # 14 / leg. Shulin Yang ”. 26°23.50'N, 108°14.20'E, 1 ♂, LS 19-0208 GoogleMaps ; Paratypes: • “ June 3, 2016 / China, Guizhou Province, Leishan County, Getou Village / Flight Intercept Trap # 2 / leg. Shulin Yang ”. 26°23.46'N, 108°14.12'E, 1 ♀, LS 16-1528 GoogleMaps ; • “ May 5, 2017 / China, Guizhou Province, Leishan County, Getou Village / Flight Intercept Trap # 1 / leg. Shulin Yang ”. 26°24.09'N, 108°13.50'E, 1 ♂, LS 17-0897 GoogleMaps ; • “ May 15, 2013 / China, Guizhou Province, Leishan County, Wudong Village / Flight Intercept Trap 150 # 2 / leg. Shulin Yang ”. 26°22.10'N, 108°10.20'E, 1 ♂, LS 13-1476 GoogleMaps ; • “ May 5, 2017 / China, Guizhou Province, Leishan County, Getou Village / Flight Intercept Trap # 2 / leg. Shulin Yang ”. 26°23.46'N, 108°14.12'E, 1 ♀, LS 17-0891 GoogleMaps ; • “ May 13, 2016 / China, Guizhou Province, Leishan County, Queniao Village / Flight Intercept Trap # 3 / leg. Shulin Yang ”. 26°24.07'N, 108°13.44'E, 1 ♀, LS 16-1511 GoogleMaps .

Diagnosis.

Melandrya bifasciata sp. nov. differs from most of its congeners by the distinct thick bicoloured hairs on its elytra, except for Melandrya jaromiri Konvička, 2015 . Both species have black and whitish-yellow pubescent elytra and legs. These two species can be distinguished by the general body profile, the shape of pronotum and elytral hair pattern. The body is strongly tapered posteriorly in M. bifasciata while it is oblong and moderately tapered posteriorly in M. jaromiri . Sides of the pronotum are nearly parallel at basal 1 / 4–1 / 3 in M. bifasciata while the sides of the pronotum are gradually tapering anteriorly in M. jaromiri . Furthermore, the pronotum is not emarginated laterally near basal pronotal sides and lacks humps on the disc in M. bifasciata . The pronotum is emarginated laterally near basal pronotal sides and with four humps on the disc in M. jaromiri .

Description.

Male (Fig. 5 a, b, d, e, g View Figure 5 ), body spindle-shaped, length 8.3–10.5 mm (anterior margin of the epistoma to the apices of elytra), width 2.6–3.2 mm (widest at elytra behind the rounded humeri); black, anteclypeus yellow to dark brown; body densely and finely punctate, with decumbent long black and pale hairs. Head (Fig. 2 d View Figure 2 ) about as long as wide; apex of labrum slightly concave in the middle; terminal maxillary palpomere cultriform, as long as palpomere 2; epistomal suture slightly raised; frons sub-square, with long sparse hairs of an radiation pattern; eyes large, slightly emarginate anteriorly; antenna (Fig. 5 e View Figure 5 ) short, not reaching middle of elytra, black except yellowish orange in apex of antennomere 11; ratios of antennomeres 1: 0.7: 1.25: 1.5: 1.2: 1.3: 1.2: 1.15: 1: 1: 1.2. Thorax. Pronotum 1.7–2.2 mm long, widest at basal 1 / 3 with width 1.9–2.3 mm, width 1.3–1.4 mm at apical margin, approximately trapezoidal at apical 2 / 3, and nearly parallel-sided posteriorly, slightly constricted at base; base slightly emarginate mesally and weakly bisinuate; pronotum with a weak longitudinal groove in the middle and slightly depressed longitudinally near basal margin at the middle of each half; hairs in the middle of pronotum black, about 1 / 3 of pronotum width; scutellum subquadrate, rounded apically, with dense, long, pale hairs. Elytra black, wider than pronotum at humeri, widest at basal 1 / 8, then tapering towards apices, rounded apically; pale hairs on each elytron presenting three patches, 1) a narrow, inverted L-shaped patch at humerus, stem of the “ L ” extending posteriorly about 1 / 4 of elytral length, 2) a transverse patch at the mid of elytron, width about 1 / 5 of elytral length, extending anteriorly along suture about its width and slightly extending posteriorly along suture, 3) an apical patch, width also about 1 / 5 of elytral length. Legs slender, most parts of femur and tibia with dense pale hairs except apical 1 / 4 of pro-tibia, apical half of meso-tibia, and apical half to apical 3 / 5 of meta-tibia, tarsomeres 1–3 of pro-tarsi slightly widened (Fig. 5 g View Figure 5 ); prosternal process short and indistinct; mesosternal process short, triangular, pointed apically. Abdomen (Fig. 2 b View Figure 2 ). Pale hairs on ventrites shorter than hairs on elytra and sparser than those on thoracic sternites. Genitalia (Fig. 5 i View Figure 5 ). Aedeagus elongate, length about 5 × width, median lobe longer than parameres, pointed apically. Female (Fig. 5 e, f, h View Figure 5 ), length 10.9–12.4 mm, width 3.6–3.9 mm; generally resembling male, differing from male in larger, stouter, and more parallel-sided body, and shorter antenna and tarsomeres 1–3 of pro-tarsi (Fig. 5 h View Figure 5 ) not expanded as in male.

Etymology.

The specific name refers to the two transverse hair bands on the middle and apex of elytra. Latin, bi (two) and fasciata (banded); an adjective.

Collection circumstances.

Specimens of this new species were collected in evergreen broadleaf forests of Quercus multinervis (W. C. Cheng & T. Hong) J. Q. Li , Fagus longipetiolata Seemen , Fagus lucida Rehder & E. H. Wilson , Pinus massoniana Lamb. , and Cunninghamia lanceolata (Lamb.) Hook growing in the villages of Wudong and Getou (Fig. 4 b View Figure 4 ).

Distribution.

China: Guizhou Province: Leishan County: Mount Leigong.