Cycnoderus (Cycnoderus) metallicus, Bezark, Larry G., Santos-Silva, Antonio & Galileo, Maria Helena M., 2016

Bezark, Larry G., Santos-Silva, Antonio & Galileo, Maria Helena M., 2016, New South American species of Cerambycinae, and notes on Corimbion balteum Martins (Coleoptera, Cerambycidae), Zootaxa 4107 (4), pp. 587-594: 590-591

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Cycnoderus (Cycnoderus) metallicus

sp. nov.

Cycnoderus (Cycnoderus) metallicus   sp. nov.

( Figs. 4–7 View FIGURES 1 – 7. 1 – 3 )

Male. Integument metallic dark-green with violaceous reflections, mainly on head, except for: mouthparts reddishbrown; scape, pedicel, and antennomeres III –V violaceous; antennomeres VI –XII reddish-brown with apex violaceous; metepisterna reddish-brown; distal areas of metasternum reddish-brown; coxae and trochanters reddish brown; femoral peduncles reddish-brown; femoral clubs violaceous (less so on profemora); tibiae and tarsi violaceous (less so on apex of protibiae); lateral sides of ventrites and most of ventrites IV –V dark reddish-brown.

Head. Frons moderately coarsely, abundantly punctate; with short, sparse setae. Area between antennal tubercles and upper eye lobes, moderately coarsely, abundantly punctate; with short, sparse setae (more abundant than on frons) interspersed with some long setae close to eyes. Vertex coarsely, abundantly punctate on area close to eyes, finer, confluent, somewhat rugose on area close to prothoracic margin. Area behind upper eye lobes coarsely, abundantly punctate, gradually confluent toward area of connection of lobes. Area behind lower eye lobes moderately finely, abundantly punctate on area near connection of lobes, gradually finer, sparser toward ventral side of head, with smooth area close to prothoracic margin. Genae finely, moderately abundantly punctate close to eyes, smooth toward apex. Submentum somewhat vermiculate interspersed with fine, moderately abundant punctures; with short, erect, sparse setae. Antennal tubercles moderately finely punctate at base, smooth on remaining surface. Longitudinal sulcus distinct from clypeus to about level of middle of upper eye lobes. Distance between upper eye lobes 0.4 times length of scape; distance between lower eye lobes 0.7 times length of scape. Antennae 12 -segmented; as long as 4.5 times elytral length; reaching elytral apex at basal third of antennomere VI; ventral side of antennomeres III –V with moderately short, thick setae (shorter, sparser from III to V); antennal formula based on antennomere III: scape = 0.46; pedicel = 0.11; IV = 1.03; V = 1.18; VI = 1.03; VII = 0.92; VIII = 0.91; IX = 1.09; X = 1.15; XI = 1.29; XII = 1.48.

Thorax. Prothorax 1.8 times longer than wide; lateral sides subparallel at anterior sixth, divergent toward base of distal third, slightly convergent toward base of distal ninth, which is subparallel. Pronotum transversely striatepunctate on basal ninth; narrow area close to anterior margin subsmooth; disc moderately coarsely, abundantly punctate (punctures coarser, more confluent close to lateral sulcus); lateral sides with narrow, longitudinal, sinuous sulcus, from apex of striate-punctate basal region to about anterior ninth, where the sulcus is abruptly curved toward lateral edge of prothorax; outer area close to longitudinal sulcus coarsely, moderately sparsely punctate; inner side of longitudinal sulcus with very short, moderately abundant white setae. Lateral sides of prothorax sparsely striate-punctate on basal ninth, moderately coarsely, sparsely punctate from apex of basal ninth to about anterior fifth, transversely striate, interspersed with fine, sparse punctures on anterior fifth (denser near anterior margin). Prosternum moderately coarsely punctate on basal two-thirds (surface somewhat rugose, except for basal lateral regions), transversely striate-punctate on anterior sixth (punctures fine), with sparse transverse striae and punctures between anterior sixth and rugose area. Prosternal process centrally as wide as half of base of profemoral peduncle; distal region triangularly expanded, finely pubescent. Mesosternum and mesosternal process pubescent, finely, moderately abundantly punctate, except for subsmooth region between them. Mesepisterna moderately coarsely, abundantly punctate. Metasternum laterally moderately coarsely, abundantly punctate, gradually finer, sparse toward center; finely pubescent. Metepisterna with sculpture and pubescence as on lateral portion of metasternum. Scutellum finely pubescent. Elytra moderately densely, coarsely punctate; wide band along suture and apex with short, moderately abundant setae, distinctly sparser on remaining surface; parallel-sided except for distinctly rounded apex (subacute at sutural angle). Femora with very short, sparse setae. Tibiae with dense setae on dorsal and lateral fourth (protibiae) or fifth (meso- and metatibiae), abundantly setose on about distal ventral half.

Abdomen. Ventrites laterally microsculptured interspersed with fine punctures, centrally finely, moderately sparsely punctate; lateral sides pubescent; central area sparsely pubescent, with erect, sparse setae.

Dimensions (mm). Holotype male. Total length (including mandibles), 10.00; prothoracic length, 2.55; anterior prothoracic width, 1.10; basal prothoracic width, 1.35; largest prothoracic width, 1.45; humeral width, 1.80; elytral length, 6.10.

Type material. Holotype male from VENEZUELA, Anzoategui: 2 km E La Ceiba (1360 ’), 2.VIII. 1988, C. & L. O’Brien, and G. Wibmer col. ( LGBC, to be deposited at CAS).

Etymology. The specific epithet refers to the metallic luster of the dorsal surface of this striking beetle.

Remarks. Cycnoderus (Cycnoderus) metallicus   sp. nov. differs from C. (C.) tenuatus Audinet-Serville, 1834   as follows: lateral tumid area of pronotum slightly distinct dorsally, not projected toward center anteriorly; densely punctate area of pronotum glabrous; longitudinal sulcus of pronotum with short, abundant white setae. In C. (C.) tenuatus   the lateral tumid area of the pronotum is very distinct in dorsal view and it is notably projected toward the center anteriorly, the densely punctate area of the pronotum has short, moderately abundant setae, and the longitudinal sulcus of the pronotum does not have white setae.


California Academy of Sciences