Trestonia grisea Martins & Galileo, 1990

Santos-Silva, Antonio, Botero, Juan Pablo, Nascimento, Francisco Eriberto de Lima & Martins, David dos Santos, 2020, New species, new records, and taxonomical notes in Cerambycidae (Coleoptera) from the state of Espírito Santo (Brazil), Papéis Avulsos de Zoologia (Pap. Avulsos Zool., S. Paulo) 60, pp. 1-22 : 7-11

Trestonia grisea Martins & Galileo, 1990 ( Figs. 30-34 )

Trestonia grisea Martins & Galileo, 1990: 87 ; Monné, 2020b: 864 (cat.).

Description: Coloration: Integument mostly dark brown; mouthparts dark reddish brown; anteclypeus reddish brown.

Head: About as wide as anterior area of prothorax. Frons subquadrate; abundantly micropunctate, with fine punctures interspersed; with yellowish-brown pubescence, somewhat abundant close to eyes, centrally, and close to clypeus, nearly absent on remaining surface. Area between antennal tubercles depressed centrally; abun- dantly punctate, with fine punctures interspersed; with abundant yellowish-brown pubescence partially obscuring integument anteriorly, shorter, sparser posteriorly. Remaining surface of vertex abundantly micropunctate (micropunctures finer and less distinct than on frons), with fine punctures interspersed (fine punctures distinctly sparser than on frons, especially toward prothorax); with almost M-shaped area with minute, nearly indistinct yellowish-brown pubescence centrally, from area between eyes, almost reaching prothoracic margin; remaining surface with dense yellowish-brown pubescence obscuring integument. Area behind eyes with dense yellowish-brown pubescence, somewhat sparser toward prothorax behind lower eye lobes. Genae finely, sparsely punctate (surface slightly rugose frontally), except for narrow smooth apex; with yellowish-brown pubescence not obscuring integument, except for glabrous smooth area. Antennal tubercles armed at apex with small rounded projection; sculpturing as on frons; with dense yellowish-brown pubescence, except for nearly glabrous center of frontal area; with a few short, erect dark setae close to lower eye lobe. Postclypeus very finely, abundantly punctate, with coarser punctures interspersed on wide central area, smooth laterally; wide central area with yellowish-brown pubescence, dense close to frons and laterally, nearly absent centrally toward anteclypeus; with tuft of long golden setae direct- ed forward on each side close to anteclypeus; smooth lateral area glabrous. Labrum coplanar with anteclypeus at posterior ⅔, oblique at anterior third; with sparse yellowish-brown pubescence on wide central area, with long, erect dark setae directed forward interspersed on coplanar area, glabrous on center of oblique area, with dense yellowish-brown pubescence on sides, and fringe of golden setae on anterior margin. Distance between upper eye lobes 0.76 times length of scape (0.48 times distance between outer margins of eyes); in frontal view, distance between lower eye lobes 1.12 times length of scape (0.71 times distance between outer margins of eyes). Antennae 1.5 times elytral length, reaching elytral apex at posterior third of antennomere IX. Scape with yellowish-brown pubescence partially obscuring integument. Pedicel with yellowish-brown pubescence partially obscuring integument, and a few short, erect brown setae interspersed ventrally. Antennomeres with dense grayish-white pubescence except for less dense, yellowish-brown pubescence on apex; antennomeres III-V with sparse, somewhat short, erect brown setae on inferior

region of inner surface; antennomere III slightly sinuous. Antennal formula (ratio) based on length of antennomere III: scape = 0.87; pedicel = 0.20; IV = 1.08; V = 0.80; VI = 0.72;VII = 0.66;VIII = 0.58;IX = 0.52;X = 0.46;XI = 0.42.

Thorax: Prothorax wider than long, with short tubercle laterally placed about middle. Pronotum with anteri- or and posterior transverse sulci well marked; central area tumid, rugose, with irregular gibbosities; with one oblique yellowish-brown pubescent band on each side of central area, convergent from anterior to posterior margin; with longitudinal, irregular yellowish-brown pubescent band centrally, from anterior margin to near middle; with longitudinal yellowish-brown pubescent band on each side, nearly absent anteriorly, more distinct centrally and close to posterior margin; central area close to posterior margin with whitish pubescence; remaining surface with minute, slightly distinctly, sparse yellowish-brown pubescence. Sides of prothorax somewhat rugose centrally, coarsely, sparsely punctate posteriorly; with two irregular, fragmented, longitudinal yellowish-brown pubescent bands, on near pronotum, another near prosternum; remaining surface with minute, sparse, slightly distinct yellowish-brown pubescence. Prosternum nearly smooth; with dense yellowish-brown pubescence laterally, sparser close to procoxal cavities, glabrous or nearly so on remaining surface. Prosternal process glabrous anteriorly, with dense, slightly bristly yellowish-white pubescence on remaining surface, except for apex with shorter and sparser pubescence. Mesoventrite with minute yellowish-white pubescence not obscuring integument. Mesanepisternum with minute yellowish-white pubescence not obscuring integument, except for dense, long yellowish-white pubescence close to mesepimeron. Mesoventral process with minute yellowish-white pubescence except for denser, longer pubescence of same color on apex. Mesepimeron, metanepisternum, and most of metaventrite with dense grayish-white pubescence obscuring integument. Scutellum with dense white pubescence centrally, somewhat golden laterally. Elytra: Coarsely, abundantly punctate on basal half, punctures gradually finer, sparser toward apex on posterior half; apex individually rounded; base with yellowish-brown pubescence, and remaining anterior ⅔ with dense white pubescence obscuring integument, with irregular, sparse yellowish-brown pubescence interspersed (posterior margin of this area oblique and irregular);posterior third with irregular, dense yellowish-brown pubescence, with areas with minute, slightly distinct yellowish-brown pubescence interspersed (also, with white pubescence interspersed on some areas). Legs: Femora with yellowish-brown pubescence dorsally, gradually whitish, with yellowish-brown pubescence interspersed toward ventral surface. Tibiae with dense yellowish-brown pubescence, nearly golden on apex, with irregular whitish pubescence interspersed.

Abdomen: Ventrites with white pubescence, with yellowish-brown pubescence interspersed, especially laterally (yellowish-brown pubescence more abundant on ventrite I), and also on central area of ventrite V, and with glabrous, irregular areas interspersed; apex of ventrites I-IV with fringe of yellow pubescence; posterior area of ventrite V with long, erect, sparse dark setae; central area of ventrite V triangularly depressed (depression gradually wider and deeper toward apex).

Dimensions in mm (1 ♀): Total length,13.90; prothoracic length, 2.20; anterior prothoracic width, 2.95; posterior prothoracic width, 2.80; maximum prothoracic width (between apices of lateral tubercles), 3.20; humeral width, 3.95; elytral length, 10.15.

Material examined: BRAZIL, Espírito Santo (new state record): Aracruz, 19°52′04″S, 40°12′29″W, 1 ♀, 29.01.1998, M.P. Santos col. ( SSA). Santa Catarina: Hansa Humboldt (currently, Corupá), holotype male, XII.1929, A. Maller col. ( MZSP).

Remarks: Female of T. grisea differs from male ( Fig. 34 ) especially by the antennae much shorter, slightly surpassing elytral apex (longer than twice body length in male). Trestonia grisea , currently recorded for the Brazilian states of Bahia and Santa Catarina, and T. lateapicata Martins & Galileo, 2010 , currently recorded from Santa Cruz ( Bolivia) and Goiás ( Brazil) are very similar. Unfortunately, Martins & Galileo (2010) did not compare them. Trestonia grisea differs from T. lateapicata by the absence of distinct arched band on posterior third of the elytra with inconspicuous pubescence (present in T. lateapicata ; only males of this species are known). Additionally, the basal antennomeres are slender and sinuous in males of T. lateapicata , while they are stouter and not sinuous in T.grisea .

Figures

Figures 23-33. (23-26) Potiaete maculata, holotype male: (23) dorsal habitus;(24) ventral habitus; (25) lateral habitus;(26) head, frontal view. (27-29) Potiaete maculata,female:(27)dorsal habitus;(28)ventral habitus;(29)lateral habitus.(30-33) Trestoniagrisea,female:(30)dorsalhabitus;(31) ventralhabitus;(32)lateral habitus;(33) head,frontal view.

Figures 34-37. (34)Trestonia grisea, holotype male,dorsal view.(35-37) Stenoeme annularis, female:(35) dorsal habitus;(36) ventral habitus;(37)metafemur.