Ceresium striatipenne 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 : 35-37

Taxon classification Animalia Coleoptera Cerambycidae

Ceresium striatipenne Dillon & Dillon, 1952 Fig. 14

Ceresium striatipenne : Dillon and Dillon 1952: 15, Fiji: Viti Levu, Nandarivatu, holotype (BPBM).

Description.

Based on the holotype and a paratype specimen (BPBM) and two specimens from 2008 surveys (FNIC, USP). Size 9.5-11.0 mm long, 2.0-2.5 mm wide at humeri; integument color maroon-brown; darker at head becoming paler towards elytral apex (Fig. 14a). Head with shallow interantennal tubercle region, tubercles only slightly raised; punctate with very sparse golden pubescence on tubercle margin; vertex and occiput with sparser almost bare golden pubescence and punctate. Distinct median line running longitudinally between eye lobes. Golden pubescence denser around eye margins (Fig. 14b). Antennae long, extending beyond elytra by one antennomere. Antennae with vestiture of short, dense, ochraceous setae (longer at apices of antennomeres). Antennomeres unspined and expanded at apices; last antennomere slightly shorter than penultimate. Antennomere 3 shorter than scape; 4 subequal in length to scape; 5 very long and the longest. Scape long, clavate, extending to apical sixth of pronotum.

Pronotum broadly arcuate, widest below middle, and transverse. Narrower at anteriorly than posteriorly. Pronotum with three longitudinally glabrous lines with moderately dense golden pubescence between glabrous lines and sparsely pubescent elsewhere. Pronotum with moderately dense punctures in center between glabrous lines and sparsely elsewhere (Fig. 14c). Elytron glabrous with sparse golden pubescence. Disk coarsely, irregularly punctate, punctures finer behind apical quarter. Elytral apex together rounded. Scutellum broadly rounded, covered with dense, golden pubescence. Legs small to moderate in length, femora distinctly but gradually clavate, hind femora extending to beyond base of fourth ventrite.

Venter of abdomen and thorax with sparse ochraceous pubescence at sides with sparser pubescence along middle. Prosternal process narrow, weakly notched and expanded at apex. Procoxal cavities closed posteriorly (Fig. 14d). Mesocoxae closed laterally to mesepimeron. Mesosternal process broad, slightly expanded at apex and inserted into mesocoxa. Mesosternum gradually declivous, without anterior tubercle, and sulcate anteriorly. Apex of terminal ventrite truncate to unevenly rounded, without notch.

Remarks.

The distinctive, longitudinal, glabrous striae characterize this species. The only other species with semi-regular glabrous areas on the elytra is Ceresium vacillans , but in that species these regions are in the form of spots rather than lines. This species is endemic to Fiji and known only from Viti Levu where the type specimens were collected at lights in August ( Dillon and Dillon 1952).