Compsibidion zonatum, Vlasak & Botero & Santos-Silva & -, 2025

Vlasak, Josef, Botero, Juan Pablo, Santos-Silva, Antonio & -, U. S. A. - - -, 2025, Cerambycidae and Disteniidae (Coleoptera) from Ecuador: new genera, new species, new records, and corrections in species-group names, Faunitaxys 13 (13), pp. 1-14 : 8-10

Compsibidion zonatum sp. nov.

( Fig. 18-25, 30-36)

ZooBank:https://zoobank.org/ 991D771C-DF85-4C43-A3BB-8AB10464BAD2

Holotype, ♂, ECUADOR, Loja: Rumi WilcoEcolodge , 1600 m, Vilcabamba, 11 Aug 203, J.Vlasak leg.( MZSP, formerly JVCO).

Paratypes, 2 ♀, same data as holotype ( JVCO) .

Description of the holotype ( Fig. 18-21, 36)

Coloration. – Head capsule reddish brown ventrally, on sides of frons, and frontoclypeal sulcus, dark brown on most central area of frons, dark brown on vertex and behind eyes, reddish brown on antennal tubercles except apices partially dark brown; ventral mouthparts light reddish brown, except orangish apex of palpomeres;clypeus andlabrum mostly reddish brown;antennae light reddish brown, more orangish brown depending on light intensity. Prothorax dark brown dorsally and laterally, reddish brown ventrally. Ventral surface of meso- and metathorax reddish brown, except dark-brown area close coxal cavities and darker on lateral and posterior marginsof metaventrite. Scutellum dark brown. Elytra dark brown on anterior third, except dark reddish-brown circum-scutellar area and light reddish-brown epipleural margin, yellowish brown between anterior third and middle, this area orangish close to suture, and reddish brown, gradually yellowish brown toward apex on posterior half. Legs mostly orangish brown, more light reddish brown depending on light intensity, with irregular, slightly darker areas. Abdominal ventrites light reddish brown. See remarks.

Head. – Frons densely, coarsely punctate, punctures partially anastomosed; frontoclypeal sulcus deep, semi-circular; frontal plate well marked, straight on posterior margin, semi-circular on remaining margins, abundantly, coarsely punctate, somewhat striate-punctate posteriorly;withirregularY-shaped shallow sulcus from frontal plate to area between antennal tubercles; with moderately abundant, short yellowish setae not obscuring integument laterally and a few short yellowish setae on remaining surface. Areabetweenantennal tuberclesand upper eye lobes abundantly, coarsely punctate, except smooth, slightly elevated longitudinal carina centrally; with sparse yellowish-white pubescence. Remaining surface of vertex abundantly, coarsely asperate-punctate on wide triangular central area, slightly rugose-punctate laterally toward eyes; with moderately sparse yellowish-white pubescence on its anterior region, glabrous closetoprothorax;withone long,erectyellowish-brownsetaclosetoeyes.Area behind upper eye lobes slightlyrugose close to eye, except smooth area close to lower eye lobe, slightly asperate-punctate close to prothorax; with sparse yellowish-white pubescence superiorly near eye, glabrous on remaining surface. Area behind lower eye lobes sparsely, coarsely punctate, slightly rugose on some regions; with long, erect yellowish-brown setae near eyes, slightly more abundant toward ventral surface. Genae abundantly, coarsely punctate, except smooth apex; with moderately sparse yellowish pubescence, except glabrous apex;with a few long, erect yellowish-white setae.Antennaltubercles with apex triangular, slightly elevated; with moderately abundant yellowish pubescence not obscuring integument. Area between antennal base and eyes with dense yellowish pubescence. Wide central area of postclypeus with sparse, short, bristly yellowish setae, absent on middle close to frons, and one long, erect yellowish-white seta on sides. Sides of postclypeus smooth, glabrous. Labrum smooth, glabrous close to anteclypeus; central area moderately abundantly and coarsely punctate, with moderately abundant, both short and long yellowish-brown setae; anterior area with abundant, short yellowish-brown setae directed forward, partially obscuring integument. Gulamentum smooth, glabrous on posterior half; anterior half moderately abundantly, coarsely punctate, with two transverse carinae, one about middle, another close to intermaxillary process, with sparse, short yellowish setae, and long, erect setae of same color interspersed. Basal 2/3 of outer surface of mandibles abundantly, coarsely punctate, with short, decumbent yellowish-brown setae not obscuring integument, and long, erectsetae of same color interspersed;apical thirdsmooth, glabrous. Uppereye lobeswith threerowsof ommatidia, excepttwoommatidia on inner apex. Distance between upper eye lobes 0.30 times distance between outer margins of eyes; in frontal view, distance between lower eye lobes 0.46 times distance betweenouter marginsof eyes.Antennae 2.1 times elytrallength, surpassingelytralapex atapical thirdof antennomereVIII.Scape withabundant yellowish-white pubescence not obscuring integument, except glabrous dorsal apex; with a few long, erect yellowish setae dorsally, laterally, and close to apex of ventral surface. Pedicel with abundant yellowish-white pubescence not obscuring integument, and a few long, erect yellowish setae throughout. Antennomeres III-XI, not carinate dorsally, not widened, with abundant yellowish-white pubescence not obscuring integument; III-V with a few long, erect yellowish setae ventrallyand on apex of dorsalandlateral surfaces;VI-X with long, erect yellowish setae on apex of ventral surface, setae gradually shorter toward X; VI with a few long, erect yellowish setae on apex of dorsal surface.

Antennal formula (ratio) based on length of antennomere III:

– Scape = 0.64. – Pedicel = 0.19. – IV = 0.87. – V = 0.97. – VI = 0.97. – VII = 0.97. – VIII = 0.90. – IX = 0.84. – X = 0.77. – XI = 0.80.

Thorax. – Prothorax longer than wide, cylindrical, with sides slightly concave from after middle to posterior sixth. Pronotum with slightly elevated gibbosity on sides slightly before middle, elongated, slightly elevated gibbosity centrally, between anterior and posterior thirds, and another small, slightly elevated gibbosity on each side of posterior fifth; abundantly, minutely punctate, except smooth cross-shaped central area; with abundant yellowish pubescence not obscuring integument, except glabrous smooth area; with a few long, erect yellowish-brownsetae.Sidesof prothorax abundantly,minutelypunctate except slightly transversely striate area close to anterior and posterior margins; with abundant yellowish pubescence not obscuring integument, except glabrous striate areas; with a few long, erect yellowish-brown setae interspersed on pubescent region. Prosternum moderately abundantly, minutely punctate on sides of posterior 3/4 and close to procoxal cavities, mostly smooth on remaining surface; with moderately abundant yellowish pubescence not obscuring integument on sides of posterior third andcentrally close toprosternal process, and a few short, decumbent yellowish setae on remaining surface; with one long, erect yellowish-brown seta on each side of area close to prosternal process. Prosternal process with a few short, decumbent yellowish setae on anterior half,glabrousonremaining surface;narrowestarea0.08 times procoxal cavity. Mesoventrite with moderately sparse yellowish pubescence. Mesanepisterna, mesepimera, metanepisterna, and sides of metaventrite with abundant yellowish-white pubescence not obscuring integument; remaining surface of metaventrite with sparse yellowish-white pubescence, except glabrous area close to metathoracic discrimen, and a few long, erect yellowish setae interspersed. Mesoventral process distinctly widened on sides of apical region; posterior margin distinctly notched centrally; with abundant yellowish pubescence not obscuring integument, pubescence sparser apically, and a few long, erect yellowish setae interspersed; narrowest area 0.49 times mesocoxal cavity; widest area 0.75 times mesocoxal cavity. Scutellum with abundant yellowish pubescence not obscuring integument.

Elytra. – Sparsely, moderately sparsely punctate; not pubescent, with long, erect yellowish-brown seta in some punctures, slightly more abundant on posterior quarter; apex rounded toward sutural angle, without projections.

Legs. – Femora, tibiae, and dorsal surface of tarsi with abundant yellowish-white pubescence not obscuring integument, except dense, bristly yellowish pubescence on inner apical surface of protibiae, apical half of ventral surface of protibiae, and apical third of meso- and metatibiae; with long, erect yellowish setae, slightly more abundant on metatibiae; metatarsomere I slightly longer than II-III together.

Abdomen. – Ventrites somewhat abundantly, minutely punctate, except smooth apex of ventrites 1-4; with abundant yellowish pubescence not obscuring integument, except glabrous smooth areas, and a few long, erect yellowish-white setae interposed; apex of ventrite 5 truncate, slightly notched centrally.

Female ( Fig. 22-25, 30-35)

– Similar to male, antennae shorter, 1.5-1.7 times elytral length, reaching elytral apex between antennomeres X and XI (proportions slightly varied between the two females);

– Abdominal ventrite 5 distinctly narrower.

Chromatic variations in the specimens examined. – Head capsule entirely brown; scape orangish brown; pedicel and flagellomeres brown; prothorax reddish brown, lighter ventrally; anterior third and posterior half of elytra dark brown, except yellowish-brown sides of posterior quarter and apex; yellowish-brown area on elytra surpassing middle; posterior third of metaventrite orangish brown; femora with large and irregular brownish areas.

Morphological variations in the specimens examined. – Anterior third of prosternal process transversely striate; narrowest area of prosternal process in females from 0.16 to 0.24 times procoxal width; sides of mesoventrite with abundant yellowish pubescence partially obscuring integument; elytra with very sparse, minute, decumbent yellowish-white setae.

Dimensions (mm) (holotype ♂ / paratypes ♀)

– Total length, 9.50/9.10-11.10;

– Prothoracic length, 1.70/1.80- 2.25;

– Anterior prothoracic width, 1.20/1.25-1.50;

– Posterior prothoracic width, 1.15/1.15- 1.25;

– Maximum prothoracic width, 1.35/1.35-1.75;

– Humeral width, 1.75/1.85- 2.20;

– Elytral length, 5.70/5.80-7.10.