Xylodrypta zhenghei, Zhang & Meng & Beaver, 2022

Zhang, Yi-Feng, Meng, Ling-Zeng & Beaver, Roger A., 2022, A review of the non-lyctine powder-post beetles of Yunnan (China) with a new genus and new species (Coleoptera: Bostrichidae), Zootaxa 5091 (4), pp. 501-545 : 537-539

Xylodrypta zhenghei sp. nov.

Fig. 38 (A–G)

Type material. Holotype: Female: CHINA: (1♀), Yunnan Daweishan National Natural Reserve , 22°54′28.09″N, 103°41′48.19″E, 06.X.2018, 2111m, leg. LZ Meng ( IZAS) . Allotype: Male: as holotype except: 22°54′30.41″N, 103°41′50.32″E, 08.III.2019, 2136m ( IZAS) . Paratypes: As holotype except: 22°54′29.66″N, 103°41′48.59″E, 19.IV.2019, 2120m (1♀); as previous except: 22°54′30.79″N, 103°41′50.17″E, 30.III.2019, 2130m (1♂); as previous except: 22°54′31.29″N, 103°41′49.10″E, 14.IV.2018, 2121m (2♀♀) (All HUC).

Description. Length 7.0–8.0 mm, 2.6 × longer than wide (n = 4), body cylindrical, elongate, slightly widened posteriorly. Body yellowish brown, head and ventral parts black, abdominal ventrites reddish brown posteriorly, antennae and legs yellowish except for dark anterior tibiae.

Head. Labrum slightly concave at middle and covered with dense downwardly directed short setae, forming a brush at anterior margin. Epistoma narrow, its surface densely granulate, apical margin arcuately emarginate., with sparse soft golden yellow hair directed medially. Fronto-clypeal suture sulciform, distinct. Frons wider than epistoma, its surface densely granulate, convex at middle, with long hairs directed medially. Vertex conspicuously wrinkled. Antennae with 10 antennomeres, club with three antennomeres, the first two slightly transverse, the third longest, elongate, rectangular, outer side of first two club antennomeres with two indistinct sensory areas covered with short, dense golden yellow hairs. Eyes slightly flattened, without setae behind ocular margins ( Fig. 39C, F ).

Pronotum. Transverse, 1.1 × wider than long (n = 4), strongly narrowed in front and widest behind middle, finely and more or less roughly punctured on area above anterior margin between uncinate teeth, glabrous, shining and smooth on disc and laterally; lateral carina absent, little crease visible only posteriorly; anterior angles each with a short, upturned tooth, behind these a row of larger asperities forming the edge of the rasp; asperities on anterior slope small, sparsely placed, becoming smaller towards summit; posterior angles not protruding and blunt apically; anterolateral part of pronotum covered with very sparsely short, white, recumbent pubescence.

Scutellar shield. Small, tongue-shaped, light brown, surface finely punctured with short soft hairs.

Elytra. 1.8 × longer than wide (n = 4). Glabrous, shining, punctures fine, shallow near base, increasing in density and size posteriorly. Upper margin of declivity bearing three pairs of spines, evenly spaced, apices of inner two pairs sharply pointed, slightly curved ventrally, outermost spine slightly less sharply pointed, directed ventrally and medially. Declivity densely punctured, punctures circular, slightly smaller in diameter than interspaces. Suture raised in lower two-thirds of declivity truncation, extending to angularly produced apex.

Abdomen. Ventrites finely, densely punctured, with dense, pale pubescence. Female abdomen without modifications of ventrites. Male abdomen with pleural pieces.

Legs. Anterior tibiae normal, widest apically, with a row of small teeth on outer side, covered with sparse golden yellow hairs.

Genitalia. Fig. 38 E&F provide the photographs of genitalia of male (E) and female (F) of X. zhenghei sp. nov.. It shows a long and slim penis of male and a much smaller size of female genitalia contour.

Diagnosis. The species is distinguished from X. lanna ( Liu et al. 2021) and X. guochuanii by the absence of a small pair of tubercles adjacent to the suture on the upper margin of the declivity. It is distinguished from X. bostrychoides by the smooth, shining pronotal disc, lacking any sculpture, and the sharply pointed (not broadly rounded) spines on the declivital margin. It is also distinguished from X. guochuanii in having the anterior slope of the pronotum and the declivity similar in colour to the rest of the dorsal surface (not black), and the absence of modifications of the fourth ventrite of the female.

Etymology. The species is named in memory of the famous Ming Dynasty explorer, Zheng He (1371-1433).

Figures

FIGURE 38. (A, B, C, D, E, F, G) Lateral (A), dorsal (B), abdomen segment (C♂, D♀), genitalia (E♂, F♀) and posterior decliv- ity (G) of Xylodrypta zhenghei sp.nov., 1 micro scale bar of E and F = 0.01 mm, and total scale bar of E and F= 1mm.

FIGURE 39. (A, B, C, D, E, F) Front and anterior 45° angel views on head of Calophagus colombiana sp.nov. (A, D), Xylodrypta guochuanii sp.nov. (B, E) and Xylodrypta zhenghei sp.nov. (C, F).