Cyclorhipidion conidentatus Smith, Beaver & Cognato, 2022

Smith, Sarah M., Beaver, Roger A., Pham, Thai Hong & Cognato, Anthony I., 2022, New species and new records of Xyleborini from the Oriental region, Japan and Papua New Guinea (Coleoptera: Curculionidae: Scolytinae), Zootaxa 5209 (1), pp. 1-33 : 9-10

Cyclorhipidion conidentatus Smith, Beaver & Cognato sp. nov.

( Figs 25–28 )

http://zoobank.org/ urn:lsid:zoobank.org:pub:78CCF021-B47F-48D6-8914-BF9AD4A33C79

Type material. Holotype, female: INDONESIA, Sulawesi Utara, Dumoga Bone N.P., ‘Clarke’ Camp lower montane forest, 1140 m, at light, March 1985, NHMUK014591834 (NHMUK) . Paratypes, female, as holotype except: G. Mogongonipa summit, 1008 m, at light, May 1985, MSUC_ARC_314151 (1, MSUC); as previous except: November 1985 (1, RABC) .

Diagnosis. This species can be distinguished by the posterior face of the protibiae inflated and denticulate, almost appearing to have a double row of denticles on outer margin; declivital interstriae 1–4 bearing a regular row of conical denticles or tubercles; and declivital striae weakly impressed.

Cyclorhipidion conidentatus is most similar to C. sus ( Schedl, 1973) and C. multipunctatum ( Browne, 1980) which both have the posterior face of the protibiae inflated and denticulate and a type 4 antennal club. C. conidentatus can be distinguished from both by the presence of conical denticles or tubercles along the entire length of declivital interstriae 2 that are as large as those of other interstriae.

Similar species. Cyclorhipidion sus , C. multipunctatum

Description (female). 3.1–3.5 mm long (mean = 3.37 mm; n = 3); 2.38–2.50 × as long as wide. Body dark reddish brown, the elytra darker especially on the declivity, vestiture fairly long and dense. Head: epistoma entire, transverse, lined with a row of hair-like setae. Frons broadly convex, slightly transversely depressed between the eyes, weakly shining, finely papillate on lower part above epistoma, the papillae with short, fine, erect hairs, traces of a fine median carina, upper part with punctures larger, sparser and impressed; vertex impunctate. Eyes deeply emarginate above level of antennal insertion, upper portion of eyes smaller than lower part. Submentum narrowly triangular, deeply impressed. Scape short and thick, approximately as long as club. Pedicel as long as funicle. Antennal funicle 4-segmented, segment 1 as long as pedicel. Club as broad as tall, circular, club type 4, flattened, segments 1 and 2 visible on posterior face. Pronotum 0.96–1.07 × as long as wide. In dorsal view long and rounded frontally, type 7, sides evenly rounded, widest in the middle, rounded anteriorly; anterior margin without serrations. In lateral view elongate with disc much longer than anterior slope, type 7, disc flat, summit just in front of middle. Anterior slope strongly convex, very densely covered with small, granulate asperities, decreasing in size towards the summit, posterior part of disc subnitid, finely densely punctate, the pubescence fairly long, inclined towards the summit. Scutellum linguiform, fairly large, shining, impunctate. Elytra: 1.42 × as long as wide, 1.33–1.48 × as long as pronotum and slightly wider. Base transverse, edge oblique, humeral angles rounded, sides parallel in basal 2/5, then slightly narrowed, rather abruptly incurved apically, with a constriction just before apex. Declivity beginning after basal half of elytra, convex, its slope gradually increasing towards apex. Basal part of disc flat, shining, striae and interstriae finely densely, irregularly, punctate, strial and interstrial punctures indistinguishable, strongly confused, setose, punctures with fairly long, inclined hairs; posterior part of disc and declivity matte, striae 1 and 2 sulcate on upper two-thirds (weakly so in both paratypes), strial punctures clear, larger and much shallower than those on interstriae, closely placed, weakly impressed; interstriae much wider than striae, each with a regular row of conical denticles or tubercles (more strongly developed in the larger specimens), extending almost to beginning of declivity on interstriae 1 and 2, progressively less close on the outer interstriae, sutural interstriae widened and outwardly convex on apical third of declivity, all interstriae with several irregular rows of minute punctures bearing long semi-erect hairs. Posterolateral margin rounded. Legs: procoxae contiguous. Protibiae semi-circular with evenly rounded outer margin, broadest at apical 1/3; eight moderate denticles on outer margin; posterior face weakly inflated, denticulate near outer margin. Meso- and metatibiae flattened, outer margins evenly rounded with 15 and 14 large similarly sized socketed denticles, respectively, their length longer than basal width.

Distribution. Indonesia (Sulawesi).

Host plants. Unknown.

Etymology. L. conus = cone, dentatus = toothed, referring to the conical denticles on the elytra.

Figures

FIGURES 21‒36. Lateral, dorsal, posterior oblique and anterior view of Cyclorhipidion achlys holotype, 3.4 mm (21–24), Cyclorhipidion conidentatus holotype, 3.1 mm (25–28), Cyclorhipidion gladigerum holotype, 2.6 mm (29–32), Cyclorhipidion lapilliferum holotype, 3.4 mm (33–36).