Onciderini Thomson 1860, sp. nov.

Onciderini Thomson, 1860

Cacostola carinata sp. nov. (Figures 7–9, 12)

Coloration. Integument dark-brown; basal two-thirds of antennomere III brown, and distal third blackish; basal half of antennomeres IV–VI reddish-brown, and distal half blackish; basal third of antennomeres VII–XI reddishbrown, and distal two-thirds blackish; dorsal side of distal half of mesotibiae black. Pubescence grayish.

Head. Frons longer than wide; pubescence dense, almost totally covering integument. Frontal side of antennal tubercles emarginate at apex, with inner side distinctly projected; pubescent, with some setae at base of frontal side. Pubescence abundant on vertex, area behind eyes, and gena (sparser under inferior ocular lobes). Coronal suture distinct from frons to anterior edge of prothorax. Genae about as long as 0.45 times length of inferior ocular lobe. Distance between superior ocular lobes equal to 0.3 times length of scape; distance between inferior ocular lobes, in frontal view, equal to 0.7 times length of scape. Antennae as long as 1.7 times elytral length; reaching elytral apex at apex of antennomere VIII; antennomeres III–IX with dark, sparse setae at ventral side (sparser from III to IX); antennomere III sinuate; antennal formula based on antennomere III: scape = 0.68; pedicel = 0.17; IV = 1.05; V = 0.96; VI = 0.79; VII = 0.61; VIII = 0.49; IX = 0.44; X = 0.40; XI = 0.45.

Thorax. Prothorax as long as 0.8 times largest width; lateral tubercle rounded; long, sparse, dark setae between base and lateral tubercle. Pronotum finely, densely punctate; in lateral view, gradually elevate from apex of basal fourth to apex; basal margin bisinuate, with center projected; pubescence almost totally obliterating integument. Ventral side of thorax pubescent. Scutellum pubescent. Elytra coarsely, abundantly punctate; pubescence abundant, but not obliterating integument; anterior lateral side with distinct carina from humerus to near middle; area between this carina and epipleura vertical; dorsal area between lateroanterior carina and distal fifth with distinct wide sulcus; area near apex gibbous; apex obliquely truncate.

Abdomen. Urosternites pubescent; pubescence irregularly denser in some areas, giving appearance of spotted to the abdomen. Legs. Metatarsomere I as long as 0.75 times II–III together; metatarsomere V (without claws) as long as 0.65 times I–III together.

Type material. Holotype female from BRAZIL, Rio Grande do Norte: Patu (06º06’S, 37º37’W; Malaise trap), IX.2008, D.R.R. Fernandes et al. leg. (MZSP). Paratype female from BRAZIL, Paraíba: São João do Cariri, [no date indicated], M.A.B. Gusmão leg. (MZSP).

Dimensions in mm (female). Total length, 7.6–8.1; length of prothorax at center, 1.1–1.2; largest width of prothorax (between apices of tubercles), 1.4–1.5; anterior width of prothorax, 1.3–1.4; posterior width of prothorax, 1.3–1.4; humeral width, 1.9–2.0; elytral length, 5.6–6.0. The smallest dimensions are those of the holotype.

Etymology. Latin, carinata = like a keel; relating to the lateroanterior carina of elytra.

Remarks. Cacostola carinata sp. nov. differs from C. sulcipennis Melzer, 1934: anterolateral sides of elytra with carina from humerus to near middle (absent in C. sulcipennis); antennae longer in female (as long as 1.7 times length of elytra) (in C. sulcipennis male = 1.7 times; in female = 1.5 times). From C. apyraiuba Martins & Galileo, 2008, it differs by the antennae slightly shorter in female (as long as 1.8 times elytral length in C. apyraiuba female), and by the scape without ring of dark pubescence (present in C. apyraiuba).