Blabicentrus lineatus, Galileo, Maria Helena M. & Santos-Silva, Antonio, 2016

Galileo, Maria Helena M. & Santos-Silva, Antonio, 2016, New American Lamiinae (Coleoptera, Cerambycidae), Zootaxa 4097 (2), pp. 220-230 : 227-229

Blabicentrus lineatus sp. nov.

( Figs. 11–14 )

Description. Holotype female. Integument dark-brown, except for: ventral side of head yellowish on base, gradually reddish-brown toward anterior margin, and gradually brownish toward lateral sides; mouthparts and anteclypeus yellowish-brown; distal antennomeres brown.

Head. Frons transverse; very finely, abundantly punctate; with dense, white pubescence obscuring integument; with long, erect, sparse setae. Area between antennal tubercles, anterior margin of prothorax, and behind upper eyes lobes with sculpture, pubescence and setae as on frons (setae slightly more abundant close to upper eye lobes). Longitudinal sulcus distinct from clypeus to anterior margin of prothorax. Antennal tubercles with sculpture and pubescence as on frons; with some moderately short, sparse, erect setae. Area behind lower eye lobes tumid close to eye; very finely, abundantly punctate, pubescent, with erect, sparse setae on tumid region, very finely, sparsely punctate, glabrous, on remaining surface. Genae pubescent on region under lower eye lobes, except for glabrous, narrow distal area; with sparse pubescence close to eye, glabrous on remaining surface on area in front lower eye lobes. Submentum with short, whitish, moderately sparse setae. Distance between upper eye lobes 0.35 times length of scape; distance between lower eye lobes in frontal view 0.60 times length of scape. Antennae as long as 1.65 times elytral length; reaching elytral apex at basal third of antennomere IX; scape and pedicel with white, not dense pubescence, interspersed with long, thick setae; antennomeres III–X with basal ring with white pubescence, mostly brownish on remaining surface (less conspicuous on antennomere III); antennomere XI with moderately sparse, white pubescence; antennomere III with thick, sparse setae ventrally; antennal formula based on antennomere III: scape = 1.01; pedicel = 0.19; IV = 0.93; V = 0.79; VI = 0.71; VII = 0.68; VIII = 0.59; IX = 0.53; X = 0.47; XI = 0.40.

Thorax. Prothorax transverse, 1.45 times wider than long including lateral tubercles; lateral sides with moderately large, conical tubercle about middle. Pronotum with row of coarse, deep punctures near basal margin; remaining surface coarsely, sparsely punctate (sparser centrally); with not dense, yellowish-brown pubescence centrally, with yellowish-white, moderately dense laterally, not entirely obscuring integument; with long, erect, sparse setae throughout. Lateral sides of prothorax coarsely, sparsely punctate between lateral tubercle and anterior margin; smooth under lateral tubercle; coarsely, sparsely punctate between lateral tubercle and basal margin (punctures partially in row near basal margin); pubescence yellowish-white, interspersed with long setae. Prosternum and prosternal process with yellowish-white pubescence (more whitish depending on light); center of prosternal process about 1/4 narrower than base of peduncle of profemora. Mesosternum, mesosternal process, metasternum, and metepisterna with dense (less so on mesosternum laterally), yellowish-white pubescence (more whitish depending on light). Scutellum with yellowish-white pubescence, more whitish at apex. Elytra coarsely, deeply punctate on basal third (punctures subaligned in rows), gradually finer, smoother toward apex; humeri slightly projected; pubescence yellowish-white on basal quarter and about distal third, maculated with broken rows with whitish pubescence; remaining surface with dense, white pubescence; with thick, sparse setae throughout (denser on basal third); apex individually rounded.

Abdomen. Ventrites very finely, abundantly punctate, interspersed with moderately fine punctures; with yellowish-white pubescence (more whitish depending on light); ventrite V moderately deeply, longitudinally sulcate at center of basal third. Legs. Femora and tibiae with yellowish-white pubescence (more yellowish on ventral side of tibiae), interspersed with long, erect setae.

Dimensions (mm). Holotype female. Total length (including mandibles), 8.5; prothoracic length, 1.8; anterior prothoracic width, 1.8; basal prothoracic width, 2.1; largest prothoracic width, 2.5; humeral width, 3.2; elytral length, 6.0.

Type material. Holotype female from BRAZIL, Rio de Janeiro: Corcovado, 16.III.1968, Alvarenga & Seabra col. ( MNRJ).

Etymology. Lineatus , Latin = lined. Allusive to the broken rows with white pubescence on elytra.

Remarks. Blabicentrus lineatus sp. nov. resembles B. bellus (Galileo & Martins, 2004) , B. martinsi Dalens et al., 2009 , and B. littoralis Dalens et al., 2009 , by the presence of distinct lateral tubercle on prothorax and transverse, wide band with white pubescence on basal two-thirds of elytra. It differs from B. bellus mainly by the elytral transverse band with white pubescence more distant from anterior margin, and by the absence of distal band large macula with white pubescence. It can be separated from B. martinsi by the elytral areas with white pubescence forming different shape and by the antennomeres not light with distinct dark apex, and without long setae on antennomeres IV–X. It differs from B. littoralis by the elytral areas with white pubescence forming different shape and by the lateral tubercle of prothorax distinctly larger (see photos of types of those three species at Bezark 2015). It can be separated from B. ghoutii Dalens et al., 2009 following the key below.

Blabicentrus lineatus sp. nov. can be included in the alternative of couplet “2”, from Dalens et al. (2009) (translated; it was necessary to simplify couplet 2 to accommodate the new species):

2(1) Elytral apex truncate.................................................................................. 3 - Elytral apex rounded.................................................................................. 2’ 2’(2) Lateral tubercle of prothorax small; humerus not projected; elytral integument bicolor. French Guiana ...................

............................................................................. B. ghoutii Dalens et al., 2009 - Lateral tubercle of prothorax large; humerus slightly projected; elytral integument with single color. Brazil (Rio de Janeiro)..

..................................................................................... B. lineatus sp. nov.

Figures

FIGURES 11 – 17. 11 – 14. Blabicentrus lineatus, holotype female: 11. dorsal habitus; 12. ventral habitus; 13. lateral habitus; 14. head, frontal view. 15 – 17. Inermestoloides flavus, holotype male (?): 15. head, frontal view; 16. dorsal habitus; 17. ventral habitus.