Dinoderus (Dinoderastes) hongheensis, 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 : 508-510

Dinoderus (Dinoderastes) hongheensis sp. nov.

Fig. 7 (A, B, C, D, E)

Type material. Holotype: CHINA: Yunnan, Jinping Fenshuiling National Natural Reserve , 22°45′53.41″N, 103°28′53.23″E, 14.V.2021, 1562m, leg. LZ Meng ( IZAS). Paratypes (4): as holotype except: 22°48′59.45″N, 103°27′20.67″E, 24.iv.2021, 1210m (2); as previous except: 04.v.2021 (1); Daweishan National Natural Reserve , 22°54′28.09″N, 103°41′48.19″E, 12.v.2018, 2111m, leg. LZ Meng (1) (all HUC) .

Description. Length 3.3–3.8 mm, 2.6 × longer than wide (n = 3); Body cylindrical, elongate, black, except femora and tibiae blackish-brown, tarsi reddish-brown.

Head. Labrum punctured at both sides, smooth and reflexed at middle. Epistoma narrow, its apical margin arcuately emarginate, sparse soft setae directed forwards. Frons indistinct, narrower than epistoma, with finely but distinctly micro-sculptured surface, setulae (seen only near to epistoma) directed towards middle of frons, vertex inconspicuously wrinkled. Antennae with 10 antennomeres, club of 3 antennomeres, the second transverse, the third of subequal width and length, broadly rounded at apex. Eyes distinctly flattened, radial setae behind ocular margins yellowish-white, short.

Pronotum. Widest behind midlength, 1.1 × wider than long (n = 3); lateral carina distinct, reaching beyond pronotal midlength and extended anteriorly to join row of denticles on anterior margin; these denticles (5 on each side) evenly spaced, median two teeth widely separated and sharply triangular, those in remaining rows finer, semicircularly distributed; basal part of pronotum covered with small, shallow punctures; prescutellar depression very shallow and inconspicuous; vestiture yellowish-white, recumbent, denser only on sides and near basal angles.

Scutellar shield trapezoidal, black.

Elytra. Faintly shining, parallel sided, 1.7 × longer than wide (n = 3), anterior margin sharp and distinct; elytral punctures small near base, increasing in size and more closely placed towards declivity, shallow, surface between them weakly (anteriorly) to distinctly (in apical part) convex; apices of elytra invisible from above, apical margin finely crenulate; declivity densely, coarsely punctured, suture distinctly raised and widened in mid-declivity; setae very fine, hardly discernible in basal and middle parts of elytra which appear almost glabrous, but distinct, erect, golden-yellow, short, sharply pointed on declivity.

Tarsi. First tarsomere long at least as long as the next two together, distal tarsomere somewhat shorter than the total length of the others; ventral side of basal two tarsomeres with brushes of dense, long setae.

Diagnosis. Currently the subgenus Dinoderastes only includes 4 species ( Borowski & Węgrzynowicz 2012). Two of these, D. (Dinoderastes) japonicus Lesne , and D. (D.) scabricauda Lesne have 11 antennomeres. Dinoderus (Dinoderastes) hongheensis sp. nov. Dinoderus (D.) speculifer , Dinoderus (D.) exilis , and D. (D.) nanxiheensis sp.nov. described below, have 10 antennomeres. These four species are distinguished by characters of the pronotum and elytral declivity. The two median teeth on the anterior margin of the pronotum are closely placed in D. exilis , but more widely separated in the other three species. D. speculifer is distinguished by an area on each side of the suture on the elytral declivity which is smooth and shining ( Fig. 9C ). D. nanxiheensis has the suture raised on the declivity, and a narrow, impunctate, shining groove on either side of it ( Fig. 8E ). The entire elytral declivity is coarsely and densely punctured in D. hongheensis and D. exilis , but the punctures of the former species are much smaller than those of D. exilis , and less closely spaced.

Etymology. The species is named in reference to the type locality. All of the type specimens were collected on both sides of the Honghe river (“Red river”, also called Yuanjiang), an important river passing through the middle of Yunnan Province and running into Laocai Province of Vietnam from Hekou County.

Distribution. China S-W (Yunnan) only.

Host plants. Unknown.

Figures

FIGURE 7. (A, B, C, D, E) Lateral (A), dorsal (B), posterior 45° angel (C), head (D) and posterior tarsi (E) views of Dinoderus (Dinoderastes) hongheensis sp. nov.. Total horizontal scale bar of B =1 mm; 1 micro scale bar of E = 0.01 mm, total micro scale bar of E = 0.2 mm.

FIGURE 8. (A, B, C, D, E) Lateral (A), dorsal (B), posterior 45°angel (C), antennae (D) and declivity (E) views of Dinoderus (Dinoderastes) nanxiheensis sp. nov.. Total horizontal scale bar of B =1 mm.

FIGURE 9. (A, B, C) Lateral (A), dorsal (B), posterior 45° angel (C) views of Dinoderus (Dinoderastes) speculifer Lesne, 1895. Total horizontal scale bar of B =1 mm.