Trichonius, Bates, 1864

Nascimento, Francisco Eriberto de L., Nearns, Eugenio H., Botero, Juan Pablo, Santos-Silva, Antonio & Martins, David dos Santos, 2020, New species and new record in Lamiinae from Espírito Santo (Brazil) (Coleoptera: Cerambycidae), Papéis Avulsos de Zoologia (Pap. Avulsos Zool., S. Paulo) 60, pp. 1-12 : 5-7

publication ID 10.11606/1807-0205/2020.60.52

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Trichonius w‑notatus sp. nov.

( Figs. 2 View Figure 2 A‑2D)

Description: Holotype female: Integument mostly dark brown, with some reddish-brown areas; mouthparts mostly reddish-brown, except palpomeres blackish with

apex yellowish, especially last palpomere; base of antennomeres reddish-brown, especially from IV; apex of antennal tubercles pale yellow; elytra dark reddish-brown on basal half, gradually darker on posterior half; with a wide dark triangle shape band apically; meso- and metafemora dark reddish-brown, especially metafemora; basal half of tibiae dark reddish-brown.

Head: Frons ( Fig. 4D View Figure 4 ) minutely, densely punctate; with yellowish-white pubescence partially obscuring integument, slightly yellower close to eyes and centrally toward vertex; with a few long, erect brownish setae close to eyes. Median groove distinct from clypeus to area between antennal tubercles and upper eye lobes, slightly distinct from this region to near prothoracic margin. Area between antennal tubercles and upper eye lobes depressed.Vertex and area behind eyes with dense pale yellowish-brown pubescence, sparser on central area of ver- tex close to prothorax, and slightly darker on vertex close to eyes. Genae slightly longer than half of lower eye lobe; minutely, abundantly punctate, except smooth narrow area at apex; with yellowish-white pubescence not obscuring integument, with long, erect, sparse dark setae interspersed, except glabrous narrow apex. Postclypeus with bristly yellowish-white pubescence on wide central area, with long, erect dark setae interspersed, glabrous laterally. Labrum coplanar with anteclypeus posteriorly, oblique anteriorly; with yellowish-white pubescence not obscuring integument on coplanar area, almost glabrous on oblique area; with long, sparse brownish setae directed forward on coplanar area; with short fringe of yellowish setae on anterior margin. Antennal tubercles moderately elevated; with yellowish-white pubescence partially obscuring integument. Distance between upper eye lobes 0.29 times length of scape (0.28 times distance between outer margins of eyes); in frontal view, distance between lower eye lobes 0.59 length of scape (0.58 times distance between outer margins of eyes). Antennae 3.0 times elytral length, reaching elytral apex at base of antennomere VI. Scape with yellowish-white pubescence not obscuring integument, whiter laterally and ventrally.Pedicel with white pubescence basally, yellowish-white, less conspicuous toward apex; with long, erect, thick black setae ventrally. Antennomeres with white pubescence basally, yellowish-white, less conspicuous on remaining surface; antennomeres III-X with long, erect, sparse, thick black setae throughout, spars- er from VIII. Antennal formula (ratio) based on length of antennomere III: scape = 1.08; pedicel = 0.12; IV = 1.15; V = 1.17;VI = 1.08;VII = 1.03;VIII = 0.98; IX = 0.95; X = 0.92; XI = 0.94.

Thorax: Prothorax transverse, 1.6 wider than long; sides with distinct tubercle with acute apex on posterior third, gradually widened from anterolateral angles to lateral tubercle, then distinctly narrowed. Pronotum convex, abundantly micropunctate; with transverse row of coarse, deep punctures near posterior margin; with dense pale yellow pubescence except seven longitudinal bands with yellowish-brown pubescence, one longitudinal on each side, from near anterolateral angle to level of posterior area of lateral tubercle, one inverted L-shaped on each side of central area, almost reaching posterior punctures, one longitudinal between lateral band and inverted L-shaped band, another transverse on area of coarse punctures; with a few long, erect dark setae on posterior sides. Sides of prothorax with abundant pale-yellow pubescence partially obscuring integument (whiter depending on light intensity). Prosternum and prosternal process with grayish-white pubescence not obscuring integument, denser laterally; narrowest area of prosternal process 0.55 times width of procoxal cavity. Mesoventrite with grayish-white pubescence not obscuring integument, denser laterally. Mesanepisternum and mesepimeron with yellowish pubescence partially obscuring integument, except grayish-white pubescence on mesanepisternum close to metaventrite. Metanepisternum and sides of metaventrite with dense yellowish-white pubescence; central area of metaventrite with grayish-white pubescence not obscuring integument. Scutellum with yellowish-white pubescence centrally, glabrous on each side of anterior half, with yellowish-brown pubescence on lateral margins. Elytra: Nearly parallel-sided on anterior ¾, narrowed on posteri- or quarter; apex obliquely truncate; with yellowish-white pubescence on anterior quarter, gradually grayish-white toward apex, except abundant, small circular areas with yellowish-brown pubescence (surrounding punctures), fragmented W-shaped band with yellowish-brown pubescence on anterior half, and wide, transverse band with yellowish-brown pubescence on posterior third; with moderately coarse, sparse punctures from which emerge long, erect, thick black setae. Legs: Profemora almost fusiform; meso- and metafemora clavate; femora with yellowish-white pubescence partially obscuring integument,with long, erect,sparse black setae on posteri- or half.Tibiae with yellowish-white pubescence on about basal ⅔, brownish, slightly conspicuous on posterior third; with long, erect, sparse, thick black setae.

Abdomen: Apex of last tergite truncate, with rounded angles. Ventrite V trunco-conical, distinctly longer than IV, surpassing elytral apex, with apex concave. Ventrite I with moderately dense grayish-white pubescence on posterior area of sides, remaining surface with pubescence of same color not obscuring integument; ventrites II-V with grayish-white pubescence, dense, obscuring integument laterally, not obscuring integument centrally.

Dimensions in mm (holotype): Total length, 7.25; prothoracic length,1.35; anterior prothoracic width,1.55; posterior prothoracic width, 1.65; maximum prothoracic width, 2.20; humeral width, 2.45; elytral length, 5.05.

Type material: Holotype female from BRAZIL, Espírito Santo: Aracruz (Tupiniquim, 19°52 ′ 22 ″ S 40°12 ′ 27 ″ W), 14.VII.1991, João Bosco da Silva col. (# 10134), ( MZSP,formerly SSA). GoogleMaps

Etymology: The epithet refers to the (W-shaped) form of elytral pubescence.

Remarks: Trichonius w‑notatus sp. nov. is similar to T. affinis Monné & Mermudes, 2008 , and T. atlanticus Monné & Mermudes, 2008 , but differs as follows: elytra with light pubescence on sutural area of the basal third; all femora with long, thick and erect dark setae dorsally. In T. affinis and T. atlanticus , the elytra lack light pubescence on sutural area of the basal third, and femora lacking long dark setae dorsally.

Trichonius w‑notatus can be included in the alternative of couplet “1” from Monné & Mermudes (2008) (translated, modified):

1. All femora with long and erect setae..................................................1’

— Femora with long and erect setae only on metafemora or all femora lacking these setae.............................................................................2

1’(1). Scape with long and erect setae;basal quarter of the elytra with wide and oblique dark macula, and with transverse dark macula about middle.Frenc4h Guiana, Brazil (Amazonas,Pará) ................................ ..................................................... T.griseus Monné & Mermudes,2008

— Scape lacking long and erect setae;basal quarter of the elytra without wide and oblique dark macula,and posterior dark macula placed after middle. Brazil (Espírito Santo).............................. T.w‑notatus sp.nov .


Sao Paulo, Museu de Zoologia da Universidade de Sao Paulo


Tavera, Department of Geology and Geophysics