Biraidion martinsi, Galileo, Maria Helena M. & Santos-Silva, Antonio, 2016

Galileo, Maria Helena M. & Santos-Silva, Antonio, 2016, New genus and new species of Neoibidionini from the Neotropical region (Coleoptera, Cerambycidae, Cerambycinae), Zootaxa 4137 (3), pp. 391-404 : 393-395

Biraidion martinsi sp. nov.

( Figs 1–3 )

Coloration. Integument dark-brown, somewhat blackish on some areas; mouthparts reddish-brown; antennomere III dark-brown on basal quarter, reddish-brown on remaining surface, except for a narrow dark-brown area at apex; antennomeres IV–XI orangish with narrow brown distal area (gradually lighter toward distal antennomeres); each elytron with large, subelliptical, semitranslucent, orangish macula on basal half, and wide, longitudinal orangish band laterally on distal half (not-well delimited).

Head. Frons obliquely, abundantly striate; laterally with moderately deep depression below antennal tubercle; with short, decumbent, sparse, yellowish pubescence. Area between antennal tubercles finely, abundantly punctate; with dense, yellowish pubescence, partially obscuring integument. Area between posterior area of antennal tubercles and prothoracic margin finely, abundantly punctate; with short, decumbent, dense, yellow pubescence obscuring integument, except for longitudinal band with pubescence distinctly not obscuring integument. Antennal tubercles finely, abundantly punctate; with short, decumbent, abundant yellow setae (not obscuring integument). Longitudinal sulcus more distinct from near clypeus to about middle of vertex. Area behind eyes wide (about 3.0 times width of upper eye lobe). Area behind upper eye lobes with sculpture and pubescence as on vertex, but interspersed with some very long setae close to eye. Area behind lower eye lobes tumid close to eye; with moderately deep sulcus close to tumid area, gradually less distinct toward ventral side; tumid area somewhat coarsely vermiculate-punctate toward upper eye lobe, finer toward ventral side; remaining surface coarsely, confluently punctate on wide area close to upper eye lobe, gradually finer, sparser, with transverse striae toward ventral side; tumid area with dense, yellow pubescence obscuring integument, interspersed with some very long setae near eye; remaining surface with very short and sparse setae. Submentum finely vermiculate, interspersed with very fine, abundant punctures; with short, yellow, abundant pubescence (not obscuring integument) interspersed with long setae. Genae with short, decumbent, moderately abundant pubescence. Distance between upper eye lobes 0.35 times length of scape; distance between lower eye lobes in frontal view 0.70 times length of scape. Antennae 2.9 times elytral length, reaching elytral apex about middle of antennomere VII; ventral side of antennomeres III–VII with long setae, gradually sparser toward antennomere VII; antennal formula (ratio) based on antennomere III: scape = 0.56; pedicel = 0.17; IV = 0.78; V = 0.94; VI = 0.91; VII = 0.89; VIII = 0.77; IX = 0.74; X = 0.69; XI = 0.78; XII = 0.82.

Thorax. Pronotum finely, abundantly punctate, except on glabrous central area (part of it corresponding to central tubercle); anterolateral tubercles small, distinct, transverse, subelliptical; posterolateral tubercles large, distinct, subrounded; central tubercle elongate, slightly distinct; surface with abundant pubescence, except for glabrous central region. Prosternum finely, densely, transversely, abundantly striate on basal half, moderately coarsely striate between middle and anterior third, somewhat rugose on anterior third; pubescence denser, decumbent, on basal half and anterior third, sparser, partially erect between these areas. Metasternum finely, densely punctate, except for smooth central area. Ventral side of meso- and metathorax abundantly pubescent (interspersed with long, erect setae on metasternum), except for glabrous central area of metasternum. Scutellum centrally longitudinally depressed, pubescent.

Elytra. Surface slightly rugose, finely, densely punctate throughout, interspersed with rows with coarse and moderately finely punctures; with moderately abundant, decumbent pubescence (not obscuring integument), interspersed with long, erect setae, moderately aligned in rows; apex narrow, obliquely truncate, with angles slightly projected.

Legs. Femora pubescent interspersed with long, erect setae.

Abdomen. Ventrites with abundant pubescence, not obscuring integument, except for glabrous apex of ventrites I–IV; apex of ventrite V truncate.

Female. Differs from male mainly by antennae from 2.00 to 2.15 times elytral length, and by elytral apices usually rounded together.

Variation. Antennomere III darkened only at apex; antennomere III entirely brown; elytral base somewhat reddish-brown; peduncle of meso- and metafemora reddish-brown on base; tibiae reddish-brown on basal half; tarsi partially reddish-brown; in on paratype female elytral apex different in each apex: rounded at left elytron; obliquely truncate at right elytron.

Dimensions (mm). Holotype male/ paratype females (3). Total length (including mandibles), 14.50/ 12.50−13.40; prothoracic length, 3.10/2.30−2.50; anterior prothoracic width, 1.90/1.45−1.50; basal prothoracic width, 2.20/1.65−1.75; humeral width, 3.00/2.30−2.60; elytral length, 8.90/7.50−7.70.

Type material. Holotype male from BOLIVIA, Santa Cruz: Hwy 9, 11 km S Cabezas, 16.XII.2011, Morris & Bonaso col. ( MZSP). Paratypes – BOLIVIA, Santa Cruz: 20 km N Camiri, Road to Eyti (6–8 km E Hwy 9, 1250 m, 19º52’S / 63º29’W), 1 female, 26.XI.2013, Wappes & Skillman col. ( RFMC); 1 female, 5, 6, 10.XII.2012, Wappes, Bonaso, Skillman col. ( ACMT); 1 female, 8–9.XII.2016, Wappes, Kuckartz & Skillman col. ( ACMT). Etymology. This new species is named after the late Ubirajara Ribeiro Martins de Souza (Bira).

Figures

FIGURES 1 – 6. 1 – 3 Biraidion martinsi sp. nov., holotype male: 1 dorsal habitus; 2 ventral habitus; 3 lateral habitus. 4 – 6, Heterachthes hildebranti sp. nov., holotype male: 4, dorsal habitus; 5, ventral habitus; 6, lateral habitus.