Xenofrea ayri, Santos-Silva, Antonio & Galileo, Maria Helena M., 2016

Santos-Silva, Antonio & Galileo, Maria Helena M., 2016, New Brazilian Cerambycidae from the Amazonian region (Coleoptera), ZooKeys 603, pp. 131-140 : 133-135

Taxon classification Animalia Coleoptera Cerambycidae

Xenofrea ayri sp. n. Figs 6-7, 8-9

Description.

Holotype male. Integument dark-brown, almost black; base of antennomeres III–V, coxae, femora, and most tibiae dark reddish-brown; abdominal ventrites brown.

Head. Frons, area between eyes and vertex finely, abundantly punctate; with gray pubescence, not entirely obscuring integument. Area behind eyes microsculptured, mainly toward lower lobe; with wide band of gray pubescence close to eye, glabrous toward prothoracic margin. Genae finely, abundantly punctate close to eye, smooth on apex; with gray, moderately sparse pubescence. Antennal tubercles covered with gray pubescence. Longitudinal sulcus distinct from clypeus to posterior margin of upper eye lobes. Distance between upper eye lobes 0.3 times length of scape; distance between lower eye lobes in frontal view 0.6 times length of scape. Antennae 1.85 times elytral length; reaching elytral apex at middle of antennomere VIII; antennomeres with short, gray pubescence interspersed with short, erect yellowish setae (denser toward distal antennomeres); antennal formula based on antennomere III: scape = 0.91; pedicel = 0.27; IV = 1.24; V = 0.72; VI = 0.69; VII = 0.67; VIII = 0.57; IX = 0.51; X = 0.48; XI = 0.51.

Thorax. Prothorax 1.3 times wider than long (including lateral tubercles); lateral tubercles placed before middle, blunt; anterolateral tubercles slightly distinct. Pronotum finely, abundantly punctate; with moderately thick, decumbent, abundant, gray setae, distinctly not obscuring integument, slightly denser laterally and on narrow, longitudinal, central band on anterior half; basal margin straight; anterior margin, rounded, somewhat projected forward centrally. Sides of prothorax with sculpture and setae as on pronotum (punctures slightly coarser). Prosternum notably narrow, about 1/3 of length of procoxal cavity; finely, densely punctate, with very short, decumbent setae. Prosternal process centrally narrowed, narrowest area as wide as half of base of peduncle of profemora. Mesosternum about as long as prosternum; finely, densely punctate; with short, decumbent, gray setae, not obscuring integument. Mesepisterna and mesepimera finely, abundantly punctate (punctures slightly coarser than on mesosternum); with gray, decumbent setae (longer than on mesosternum), not obscuring integument. Metepisterna with gray, decumbent, dense setae, obscuring integument. Metasternum with gray, dense pubescence. Scutellum with gray, moderately sparse, decumbent setae.

Elytra. Sides slightly convergent from humerus to about distal third, then rounded, narrowed toward sutural angle; coarsely, densely punctate (slightly finer toward apex); with gray, thick, short setae forming longitudinal rows (somewhat less distinctly on anterior quarter).

Legs. Femora notably clavate; with decumbent, gray pubescence, not obscuring integument. Tibiae mostly with gray, decumbent, short setae.

Abdomen. Ventrites finely, abundantly punctate; with decumbent, grayish setae, not obscuring integument.

Dimensions in mm.

Total length, 4.40; prothorax: length, 1.00; anterior width, 1.15; posterior width, 1.15; largest width, 1.40; humeral width, 1.75; elytral length, 3.15.

Type material.

Holotype male from BRAZIL, Amazonas: Novo Airão (02°38'39"S / 60°56'07"W; armadilha luminosa, dossel, 18:00-21:00h), 27.VIII.2011, F. F. Xavier & A. Agudelo col. (INPA).

Etymology.

Tupi, ayrí = tiny; relating to the small size of the species.

Remarks.

Xenofrea ayri sp. n. is the smallest known species of the genus, and can be easily recognized by the elytral pubescence forming rows, while in the other species the elytra always have different complex patterns.