Ceresium lucidum Dillon & Dillon, 1952

Waqa-Sakiti, Hilda, Winder, Linton & Lingafelter, Steven W., 2015, Review of the genus Ceresium Newman, 1842 (Coleoptera, Cerambycidae) in Fiji, ZooKeys 532, pp. 15-53 : 25

Taxon classification Animalia Coleoptera Cerambycidae

Ceresium lucidum Dillon & Dillon, 1952 Fig. 7

Ceresium lucidum : Dillon and Dillon 1952: 25, Fiji: Viti Levu, holotype (BPBM).

Description.

Based on the holotype specimen (BPBM). Size 9.5 mm long, 2.0 mm wide at humeri; integument color reddish brown, lighter brown towards elytral apex (Fig. 7a). Head with shallow interantennal tubercle region, tubercles only slightly raised; punctate with sparse ochraceous pubescence on tubercles and throughout frons; vertex and occiput with sparse ochraceous pubescence. Frons and frontoclypeal margin punctate with sparse and long, ochraceous hairs (Fig. 7b). Antennae long, extending beyond elytra by <2 antennomeres. Antennae with vestiture of short, dense, ochraceous setae. Antennomeres unspined and not expanded at apices; antennomeres 9-11 damaged. Antennomere 4 almost subequal to scape (0.9 mm); 5 longest. Scape very short, gradually clavate, extending slightly beyond apex of pronotum.

Pronotum broadly arcuate, widest across middle, and almost as wide as long. Pronotum with sparse punctures and sparsely scattered pubescence elsewhere (Fig. 7c). Elytron with sparse and regularly spaced ochraceous pubescence. Punctation dense, shallow and gradually becoming shallower and smaller in size towards apex. Elytral apex rounded to suture. Scutellum triangular and narrowly rounded covered with sparse, ochraceous pubescence. Legs moderate in length, femora distinctly but gradually clavate, base of hind femora (3.02 mm) extending to apical margin of 5th ventrite.

Venter of abdomen and thorax sparsely ochraceous pubescent throughout, not obscuring integument. Length of abdomen 3.82 mm. Prosternal process very narrow, gradually declivous, weakly notched and expanded at apex, less than 1/5 width of procoxa. Procoxal cavities widely open posteriorly. Mesocoxae closed laterally to mesepimeron (Fig. 7d). Mesosternum not produced vertically, without anterior tubercle or sulcus; without lateral projections into mesocoxae. Apex of terminal ventrite subtruncate without notch.

Remarks.

The key characters show this species to be closest to Ceresium epilais . Ceresium lucidum is distinguished by having the pronotum with a diffuse, dark macula at either side of middle, and being widest anterior of the midpoint while Ceresium epilais lacks pronotal maculae and is widest medially at sides. This rare species is endemic to Fiji and known only from the holotype that was collected on Viti Levu at lights during October ( Dillon and Dillon 1952).