Giesberticus longiventris Wappes and Santos-Silva, 2019

Wappes, James E. & Santos-Silva, Antonio, 2019, Descriptions of one new genus and seven new species of Rhinotragini (Coleoptera: Cerambycidae: Cerambycinae), Insecta Mundi 695, pp. 1-19 : 13-14

Giesberticus longiventris Wappes and Santos-Silva , new species

( Fig. 27–30 )

Description of male holotype and paratypes. Integument mostly black; mouthparts dark reddishbrown, except yellowish galea and palpomeres brown with apex yellowish; anteclypeus and labrum dark yellowish-brown marbled with brown areas; scape black basally, gradually dark brown toward apex; pedicel brown, gradually dark reddish-brown toward apex; antennomere III yellowish-brown; antennomere IV yellowish-brown basally, gradually reddish-brown toward apex; antennomere V reddish-brown basally, brown toward apex; remaining antennomeres brown; elytra mostly yellowish-brown, with pale yellow band on each side of scutellum, black macula close to epipleural margin, starting distant from humerus, gradually becoming reddish-brown toward elytral apex; pro- and mesofemora dark brown, almost black, except narrow yellowish area in apex of mesofemora; metafemora dark brown (almost black) at base of peduncle, gradually reddish-brown toward apex of club (dark brown in narrow apex of club); pro- and mesotibiae dark brown basally, gradually reddish-brown toward apex; metatibiae yellowish-brown basally, reddish-brown in remaining surface (slightly lighter near apex); abdominal segments I–II orange (yellow depending on light intensity); abdominal segment III dark brown, except yellowish-brown inverted V-shaped area starting at base; abdominal ventrite IV entirely dark brown, almost black; abdominal ventrite V dark brown, almost black, except yellowish distal area.

Head. Frons moderately finely, somewhat abundantly punctate near clypeus, indistinctly punctate between eyes; with bristly yellowish-white pubescence (whiter depending on light intensity), slightly denser between eyes. Vertex and most of area behind upper eye lobes coarsely, abundantly, partially confluently punctate; area adjacent to posterior margin of upper eye lobes smooth, glabrous; with sparse, bristly yellowish-brown pubescence (slightly lighter depending on light intensity). Area behind lower eye lobes rugose-punctate; with sparse, short and long, erect yellowish-brown setae. Antennal tubercles slightly elevated, moderately finely, abundantly punctate, except smooth dorsodistal half; with sparse yellowish-brown pubescence basally (whiter depending on light intensity), smooth area glabrous. Genae about half length of lower eye lobe; finely, densely, confluently punctate except smooth distal area; with sparse yellowish-white pubescence (whiter depending on light intensity), except glabrous smooth area. Median groove distinct from clypeus to area between antennal tubercles. Wide central area of postclypeus moderately abundantly, finely punctate, with sparse yellowish-white setae (whiter depending on light intensity) close to frons, smooth and glabrous laterally and close to anteclypeus; with one long, erect, brownish seta on each side of wide central area. Gulamentum smooth, glabrous in posterocentral area; moderately coarsely, sparsely punctate, with long, erect brownish seta emerging from each puncture on sides of posterior area; depressed anteriorly (except elevated anterior margin), transversely striatepunctate, with sparse, long, erect brownish setae. Upper eye lobes moderately wide, with inner margin rounded; distance between upper eye lobes 0.86 times length of scape; in frontal view, distance between lower eye lobes 0.25 times length of scape. Antennae 0.6 times elytral length, slightly surpassing basal quarter of elytra. Scape moderately finely, abundantly punctate, except smooth apex; with sparse yellowish-brown pubescence (whiter depending on light intensity), with sparse, long, erect dark setae interspersed, denser ventrally in distal half. Pedicel and antennomeres III–VI with long, erect dark setae ventrally, gradually sparser toward VI (only at apex in VI); pubescence sparser in antennomere III, distinctly denser on remaining segments. Antennal formula (ratio) based on length of antennomere III (only holotype measured): scape = 0.69; pedicel = 0.29; IV = 0.44; V = 0.56; VI = 0.47; VII = 0.41; VIII = 0.34; IX = 0.31; X = 0.25; XI = 0.44.

Thorax. Pronotum with dense white pubescent band anteriorly, accompanying the curvature of anterior margin, slightly less dense, narrower, and slightly yellowish toward central area, continuing laterally toward sides of prothorax, where it is gradually divergent from anterior margin, and bifurcated from middle; posterior area with fine yellowish-white pubescence not obscuring integument, more whitish and thicker centrally and laterally, continuing laterally toward sides of prothorax, where it is distinctly curved; remaining surface with minute whitish seta emerging from nearly all punctures, and a few long, erect yellowish setae. Remaining lateral surface of prothorax with minute yellowish setae emerging from nearly all punctures. Prosternum coarsely punctate on sides of posterior 2/3, minutely densely punctate, with moderately coarse punctures interspersed centrally, nearly glabrous laterally, with sparse yellowish-white pubescence centrally (whiter depending on light intensity); anterior third finely, transversely striate, nearly entirely glabrous. Ventral surface of mesothorax with dense yellowish-white pubescence (whiter depending on light intensity), denser in some areas. Metanepisternum moderately coarsely, abundantly punctate basally, gradually sparsely punctate toward apex; with moderately abundant yellowish-white pubescence basally (whiter depending on light intensity), sparser on wide central area, distinctly dense close to apex. Metaventrite with moderately abundant yellowish-white pubescence anterolaterally, with long, erect yellowish setae interspersed; remaining surface with sparse, short yellowish setae, with long, erect setae of same color interspersed, except glabrous central area. Scutellum with dense yellowish-white pubescence.

Elytra. Coarsely, moderately abundantly punctate basally, denser, confluent laterally, somewhat sparsely punctate in vitreous area, abundantly punctate in posterodorsal area (punctures finer than anteriorly); with a few long, erect, brownish setae anteriorly, very sparse, short, erect yellowish setae on remaining surface. Legs. Femora with sparse, erect yellowish setae, longer, more abundant on club. Tibiae with sparse, long, erect yellowish-white setae on basal half, gradually yellowish-brown toward apex, and moderately dense, bristly yellowish-brown pubescence in posterior area of ventral surface and sides.

Abdomen. Last two abdominal tergites with abundant, short, decumbent yellowish-white pubescence. Ventrites I–II finely, sparsely punctate, with sparse, short yellowish setae; ventrite III moderately finely, sparsely punctate (punctures slightly asperate), with sparse, short yellowish setae centrally, longer on posterocentral area, distinctly more abundant laterally; ventrites IV–V moderately coarsely, abundantly punctate (punctures asperate), with moderately abundant, decumbent yellowish-white setae and interspersed abundant, long, erect brownish setae.

Variation. Anteclypeus and labrum mostly dark brown; black lateral band of elytra gradually lighter distally from middle of elytra; abdominal ventrites I–II reddish-brown, irregularly marbled with darker areas; abdominal ventrites III and V entirely dark brown (almost black); abdominal ventrite III mostly orange marbled with dark areas; abdominal ventrite V entirely reddish-brown; pubescence on frons golden, distinctly sparser centrally close to clypeus; area behind lower eye lobes with golden pubescent fringe close to eye; pubescence on pronotum and sides of prothorax distinctly yellowish-brown (nearly golden); dense pubescence on metanepisternum yellowish-brown; pubescence of scutellum yellowish-brown;

Dimensions (mm), holotype male / paratypes male. Total length 11.90/13.65–14.45; prothoracic length 1.70/1.85–1.95; anterior prothoracic width 1.25/1.30–1.35; posterior prothoracic width 1.20/1.30–1.35; maximum prothoracic width 1.50/1.65–1.70; humeral width 1.50/1.70–1.75; elytral length 5.85/5.85–6.70.

Type material. Holotype male from BOLIVIA, Cochabamba: 1 km E Villa Tunari , 8–12.X.1992, E. Giesbert col. ( FSCA) . Paratypes – BOLIVIA, Santa Cruz: Hotel Flora & Fauna ( 4.6 km SSE Buena Vista ), 1 male, 22-25.X.2007, Martins and Galileo col. ( MZSP); 1 km W Candelaria village (5 km W Buena Vista, Hotel Flora and Fauna ; on flying to flowers of Gomphrena vaga Mart. ), 1 male, 21.VIII.2007, Robin Clarke and S. Zamalloa col. ( ACMT, formerly MZSP) .

Remarks. Giesberticus longiventris gen. et sp. nov. had previously been identified as the male of Odontocera globicollis Zajciw, 1971 ( Fig. 31 ) ( Monné and Giesbert 1994; Wappes et al. 2006; Monné and Hovore 2006; Bezark 2019), which was described and known only by the holotype female from Brazil (Mato Grosso). Unfortunately, it was destroyed during the 2018 fire that consumed the MNRJ. However, based on other genera of Rhinotragini with similar appearance, the male and female abdomens are generally very similar, which is not the case for these specimens.

Etymology. The specific name is descriptive of the extremely long abdomen extending well past the elytral apices of the male holotype.

Figures

Figures 27–31. 27–30) Giesberticus longiventris new genus and species, holotype male: 27) Dorsal habitus. 28) Ventral habitus. 29) Lateral habitus. 30) Head, frontal view. 31) Odontocera globicollis, holotype female.

Figures 27–31. 27–30) Giesberticus longiƲentris new genus and species, holotype male: 27) Dorsal habitus. 28) Ventral habitus. 29) Lateral habitus. 30) Head, frontal view. 31) Odontocera globicollis, holotype female.