Calophagus colombiana, 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 : 529-530

Calophagus colombiana sp. nov.

Fig. 36 (A–E)

Type material: Holotype: Female: CHINA: Yunnan Daweishan National Natural Reserve , 22°50′50.31″N, 103°45′28.60″E, 19.IV.2020, 1893m, leg. LZ Meng. ( IZAS) . Allotype: Male: as holotype. Paratypes: as holotype (4♀♀, 4♂♂); as previous except: 22°50′52.90″N, 103°45′28.95″E, 29.V.2020, 1872m (1♀, 3♂♂); as previous except: 19.IV.2020 (1♂); as previous except: 22°50′52.14″N, 103°45′28.59″E, 28.V.2019, 1881m (1♂); as previous except: 22°50′55.03″N, 103°45′29.29″E, 19.IV.2020, 1843m (3♂♂); as previous except: 22°54′30.79″N, 103°41′50.17″E, 29.V.2019, 2130m (1♀); as previous except: 22°54′30.41″N, 103°41′50.32″E, 20.X.2018, 2136m (1♂) (all HUC).

Description. Length 7.0–8.0 mm, 2.4 × longer than wide (n = 4), body cylindrical, elongated, and slightly widened posteriorly; pronotum yellowish-brown, elytra sometimes bicoloured, becoming darker from yellowish-brown anterior to dark-brown at apical declivity, sometimes elytra wholly darker; ventral parts yellowish-brown anteriorly, abdomen blackish-brown; anterior tibiae black.

Head. Labrum concave at middle and covered with dense downwardly directed setae, especially at the anterior margin. Epistoma narrow, its surface densely granulate, apical margin arcuately emarginate, with moderately dense, soft, golden yellow hairlike setae directed medially. Fronto-clypeal suture sulciform, quite distinct. Frons narrow, wider than epistoma, its surface densely granulate, convex at middle, setae near epistoma curved towards middle of frons. Vertex conspicuously wrinkled. Antennae with 10 antennomeres, funiculus with 5, the funicular antennomeres gradually becoming more transverse towards club of 3 antennomeres; first club antennomere somewhat oval, the second and third elongate rectangular, the third longest, both sides of the club antennomeres with two longitudinal bands of short and dense golden yellow hairs, less distinct on the apical antennomere. Eyes slightly flattened, without setae behind ocular margins ( Fig.39A, D ).

Pronotum. Transverse, 1.25 × 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, smooth and impunctate surface on posterior half of pronotum and laterally. Lateral carina visible only posteriorly as an indistinct fold. 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, densely placed, becoming smaller towards summit. Posterior angles angulate, anterolateral part of pronotum with sparse punctures with dense, long, white, recumbent pubescence.

Scutellar shield. Small, tongue-shaped, slightly convex, finely punctured.

Elytra. Length to width ratio 1.7 × (n = 4); Glabrous and shining anteriorly, punctures small, shallow near base, increasing in density, size and depth posteriorly, sometimes coalescent near declivity, and interspaces very narrow. Margin of declivity with three pairs of small, slightly protruding, bluntly tipped tubercles, the first pair adjacent to suture, the second and third widely separated, the third larger, placed a little below the midpoint of the declivity; declivital surface densely punctured, the punctures circular, the base smooth, the diameter slightly less than the interspaces; suture distinctly raised in lower two-thirds of declivity, slightly less so at the apex.

Abdomen. Ventrites with dense, fine pubescence. Male: last ventrite with pleural pieces, ventries 1-4 unmodified. Female: penultimate ventrite with a median, distinctly convex process directed posteriorly and slightly ventrally, terminating in a row of four separate long sharply pointed spines, of almost equal length, the median pair more strongly ventrally curved ( Figs 36A, C ).

Legs. Anterior tibia normal, widest apically, with a row of small teeth externally, covered with sparse golden yellow setae. Second and third segments of tarsi usually distinctly wider than following segments, and bearing golden-yellowish, long and thick brushes of hairs.

Diagnosis. The species is placed provisionally in Calophagus Lesne. The genus at present contains only a single species, C. pekinensis Lesne, 1902 (Liu 2021) . This is the only Oriental genus of Xyloperthini which has longitudinal bands of hairs on the club antennomeres, as found in the present species. It shares the thick brush of hairs on the frons, the three rather small tubercles on the margin of the elytra declivity, the presence of pleural pieces in the male, and the general habitus of C. pekinensis . However, in contrast to C. colombiana , C. pekinensis completely lacks a lateral carina on the pronotum, and the female ventrites are unmodified (Liu 2021). C. colombiana also differs from C. pekinensis in the coarse punctation of the posterior part of the elytra, which in C. pekinensis is smooth and very finely punctured. Most genera of Xyloperthini are in need of revision, although some progress has been made (e.g. Liu & Beaver 2017; Liu 2021; Liu et al. 2021), and further studies, preferably comparing DNA, are needed to determine whether the present species is correctly placed.

Etymology. The species is named in reference to the famous voyager, Cristóbal Colón (Spanish, 1451-1506), as both Chinese authors of this manuscript have dreamed, during their youth, of being a captain and sailing around the world.

Figures

FIGURE 36. (A, B, C, D, E) Lateral (A), dorsal (B), abdomen (C♀, D♂) and longitudinal bands on club antennomeres views of Calophagus colombiana sp.nov.. Total horizontal scale bar of B =1 mm.

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).