Coleoxestia apeara, Galileo, Maria Helena M. & Santos-Silva, Antonio, 2016

Galileo, Maria Helena M. & Santos-Silva, Antonio, 2016, Two new species of Coleoxestia Aurivillius, 1912 from Brazil (Coleoptera, Cerambycidae, Cerambycinae, Cerambycini), ZooKeys 612, pp. 125-132 : 126-127

Taxon classification Animalia Coleoptera Cerambycidae

Coleoxestia apeara sp. n. Figs 1, 2, 3, 4

Description.

Holotype male. Integument dark brown, almost black; mouthparts brown, with yellowish areas; sensorial area of antennomeres dark reddish brown; femora mostly reddish brown, with base and apex dark brown; ventrites gradually lighter from I to V.

Head. Frons coarsely, confluently punctate laterally; diamond-shaped, tumid area close to clypeus coarsely, sparsely punctate; with short, sparse, white setae (sparser on diamond-shaped area) interspersed with some long setae close to antennal tubercle. Area between antennal tubercles deeply sulcate. Area between upper eye lobes and middle of vertex coarsely, confluently punctate; area of vertex close to margin of prothorax coarsely, abundantly punctate (punctures smaller than area closer to eyes); with very short and sparse setae, except for long, yellowish, erect setae close to upper eye lobes. Longitudinal sulcus distinct from clypeus to area between antennal tubercles. Area behind upper eye lobes coarsely confluently punctate toward eye, somewhat finer toward prothorax; with short, sparse setae. Area behind lower eye lobes coarsely, abundantly punctate close to prothorax, smooth on entire superior area close to eye, coarsely, confluently, shallowly punctate on narrow band close to inferior area of eye, smooth between this band and punctate area close to prothorax. Antennal tubercles coarsely, moderately abundantly punctate toward antennal socket, sparser toward sulcus between tubercles. Genae finely, confluently punctate, with short, sparse setae (denser close to eye), except for narrow, smooth, glabrous area close to apex; apex projected forward, subacute. Gula finely, transversely sulcate. Submentum opaque, microsculptured, coarsely, shallowly, sparsely punctate (punctures laterally confluent); with short, yellowish, moderately abundant setae interspersed with long setae (more abundant laterally). Postclypeus finely, abundantly punctate centrally, smooth laterally; with short, sparse setae on punctate area, with one long seta each side. Basal half of labrum coplanar with clypeus, finely, sparsely punctate, with short sparse setae, with tuft of very long setae laterally; distal half distinctly inclined, finely, abundantly punctate, with long, abundant setae. Distance between upper eye lobes 0.35 times length of scape; distance between lower eye lobes in frontal view 0.85 times length of scape. Antennae as long as 1.15 times elytral length; reaching elytral apex at base of antennomere XI. Scape slightly, gradually enlarged toward apex; finely, abundantly punctate; with short, sparse setae interspersed with some long setae. Antennomere III distinctly enlarged from base to apex, flattened from inner to outer surface; sensorial area wide, very distinct dorsally and ventrally, carinate on distal outer half; inner surface shiny; outer apex rounded. Antennomeres IV–X parallel-sided, with sensorial area wide and very distinct (gradually wider toward X), carinate on outer surface from base to apex; inner surface gradually more microsculptured from IV to X; distinctly flattened from inner to outer surface. Antennomere XI narrowed on distal third; entirely microsculptured. Antennal formula (ratio) based on antennomere III: scape = 0.61; pedicel = 0.15; IV = 0.77; V = 0.86; VI = 0.86; VII = 0.82; VIII = 0.78; IX = 0.78; X = 0.77; XI = 1.15.

Thorax. Prothorax slightly wider than long (largest width 1.1 times length); laterally with three gibbosities (central ones largest). Pronotum coarsely, abundantly punctate (punctures confluent on some areas), except for smooth central, longitudinal callosity on basal half, and subsmooth area close to anterior margin; with very short and sparse setae; with some long setae laterally on basal half. Sides of prothorax coarsely, densely, confluently punctate, except for anterior area with punctures smoother and less distinct; with very short, sparse setae interspersed with some long setae. Basal half of prosternum smooth, glabrous centrally, coarsely, abundantly punctate, with short, sparse setae laterally; anterior half transversely sulcate, coarsely, sparsely punctate on its basal third, smooth toward anterior margin, with short, sparse setae. Prosternal process smooth, glabrous centrally, with very short, abundant setae laterally; horizontal apex cordiform. Mesosternum microsculptured, coarsely, sparsely punctate; with short, abundant pubescence (not obscuring integument). Mesepimera and mesepisterna with short pubescence, not obscuring integument. Mesosternal process without tubercle, pubescent. Metepisterna with short pubescence, not obscuring integument. Metasternum finely, moderately sparsely punctate throughout, interspersed with coarse, sparse punctures each side of longitudinal sulcus; with short, abundant setae laterally, gradually sparser toward center, interspersed with long, sparse setae (more abundant each side of longitudinal sulcus). Scutellum with short, moderately sparse setae. Elytra. Shiny, finely, abundantly punctate, gradually finer toward apex; nearly all punctures with microscopic seta; apex somewhat obliquely truncate; outer angle with long, curved spine (outer side accompanying elytral curvature); sutural angle with distinct spine (shorter than that on outer angle). Legs. Apices of meso- and metafemora with rounded lobe.

Abdomen. Ventrites finely, sparsely punctate (slightly denser on V); ventrites I–IV laterally pubescent, with short sparse setae on remaining surface, interspersed with long setae centrally; ventrite V with short and long setae more abundant than on remaining ventrites; apex of ventrite V widely truncate.

Dimensions in mm (male). Total length, 23.5; length of prothorax at center, 3.8; largest width of prothorax, 4.2; anterior width of prothorax, 3.2; posterior width of prothorax, 3.6; humeral width, 5.5; elytral length, 16.8.

Type material.

Holotype male from BRAZIL, Distrito Federal: Brasília (Fazenda Água Limpa, Universidade de Brasília, 1050 m, 15°56'49"S / 47°56'15"W), 25.III.2008, J. A. Rafael & F. F. Xavier Filho col. (INPA).

Etymology.

Tupi, apéara = surface. It refers to the surface of the pronotum coarsely punctate, without striae.

Remarks.

Coleoxestia apeara sp. n. belongs to the group of species without striae on pronotum and with antennomeres distinctly explanate laterally. Only Coleoxestia cinnamomea (Gounelle, 1909), Coleoxestia exotica Martins & Monné, 2005, and Coleoxestia ebenina Melzer, 1935 share both features with the new species. It differs from Coleoxestia cinnamomea as follows: integument dark brown, almost black; elytral punctures finer; antennae in male surpassing elytral apex by antennomere XI. In Coleoxestia cinnamomea the integument is from orangish to reddish-brown, the elytral punctures are fine, but distinctly coarser than in the new species, and the antennae in male surpass elytral apex by antennomeres X and XI. It can be separated from Coleoxestia exotica by the elytra shiny (opaque in Coleoxestia exotica ) and by the basal antennomeres distinctly wider (narrower in Coleoxestia exotica ). It differs from Coleoxestia ebenina mainly by the elytra shiny (more opaque in Coleoxestia ebenina ) and distinctly punctate (without distinct punctures in Coleoxestia ebenina ).

Coleoxestia apeara sp. n. can be included in the alternative of couplet “19” from Martins and Monné (2005) (translated; modified):