Styloleptus flavomaculatus, Santos-Silva & Bezark & Tavakilian & Audureau, 2025

Styloleptus flavomaculatus sp. nov.

( Figs 14–18 View FIGURES 14–18 )

Description. Holotype male. Head capsule blackish except genae dark brown with apex partially yellowish brown, and brown ventral surface; ventral mouthparts light brown, except palpomeres brown with yellowish apex of maxillary palpomere IV and labial palpomere III; anteclypeus brown centrally, pale yellowish brown laterally; labrum dark brown on posterior 2/3, light yellowish brown on anterior third; scape light brown on basal quarter, dark brown on apical seventh, orangish brown on remaining surface, this area gradually lighter toward dark-brown apical area; pedicel dark brown; antennomere III orangish brown about basal half, with irregular brownish areas dorsally, dark brown on remaining surface; antennomeres IV–VI orangish brown on basal half, slightly darker basally and close to posterior half, dark brown on apical half; antennomeres VII–XI orangish brown on basal half, brown on apical half. Pronotum dark brown, except small orangish-brown macula on each side of middle close to anterior margin. Sides and ventral surface of prothorax dark brown, more blackish on sides close to posterior margin. Ventral surface of meso- and metathorax dark brown, except reddish-brown sides of mesoventrite. Scutellum dark brown. Anterior half of elytra orangish-brown laterally, lighter on humeral area, reddish brown toward suture, with irregular dark-brown maculae interspersed; posterior half with large slightly oblique orangish macula, from middle to posterior fifth, reaching epipleural margin, not reaching sutural margin, with its inner margin rounded, surrounded by brown band, except on outer area of superior region; posterior half of area close to suture brown superiorly, gradually pale yellow toward apex, with dashed brown maculae interspersed, brown maculae gradually lighter toward apex; remaining surface of apical fifth pale yellow, with irregular brownish maculae interspersed. Pro- and mesofemoral peduncles reddish brown, darker on profemora; metafemoral peduncle mostly orangish brown; pro- and mesofemoral clubs dark brown ventrally and on almost entire sides, orangish brown on remaining surface; with dark brown arc dorsally and laterally, reddish brown on basal half of ventral surface, dark brown on remaining ventral surface, and orangish on remaining surface. Basal 2/3 of protibiae orangish brown, except base more brownish and brownish arc dorsally and laterally before middle of tibiae; apical third almost black. Meso- and metatibiae orangish about basal 2/3, except brownish base and ring before middle of tibiae, this ring lighter ventrally; apical third dark brown. Tarsi mostly dark brown. Abdominal ventrites reddish brown, gradually orangish toward apex, lighter area wider from ventrite 4.

Head. Frons densely, finely punctate, except smooth median groove; with moderately abundant pubescence not obscuring integument, except glabrous median groove, pubescence brownish with short, decumbent yellowish-white setae interspersed on superior transverse band, more yellowish brown close to eyes, both yellowish brown and yellowish white close to eyes, except small area with dark-brown pubescence before middle, and brown pubescence on remaining surface, this area with paler pubescence interspersed close to median groove and clypeus; with one long, erect dark-brown seta close to eyes. Area between antennal tubercles with abundant dark yellowish-brown pubescence not obscuring integument, except glabrous median groove. Remaining surface of vertex with dense pale yellowish-brown pubescence, except glabrous median groove and triangular central area between antennal tubercles and upper eye lobes. Area behind eyes with dense pale yellowish-brown pubescence, except glabrous area behind lower eye lobes close to prothorax. Genae 0.7 times as long as lower eye lobe; with sparse yellowish-brown pubescence, with a few erect dark-brown setae interspersed, except glabrous apex. Antennal tubercles with moderately abundant brown pubescence not obscuring integument, with dark, decumbent, short yellowish-brown setae interspersed dorsally. Wide central area of postclypeus with sparse whitish pubescence, moderately long, erect brownish setae interspersed close to anteclypeus, and one long, erect dark-brown seta on each side. Sides of postclypeus glabrous. Labrum with moderately sparse brown pubescence on posterior half, with long, erect dark-brown setae interspersed, glabrous on anterior half, except fringe of pale setae on anterior margin. Distance between upper eye lobes 0.31 times distance between outer margins of eyes; in frontal view, distance between lower eye lobes 0.54 times distance between outer margins of eyes. Antennae 2.25 times elytral length, reaching elytral apex at apical third of antennomere VI. Scape with brownish pubescence not obscuring integument on basal quarter, brown pubescence not obscuring integument on apex of dorsal surface, white pubescence not obscuring integument on remaining surface, except brownish pubescence not obscuring integument on part of dorsal and lateral surfaces of anterior half. Pedicel with dark-brown pubescence not obscuring integument and short, decumbent white setae interspersed ventrally. Antennomere III with yellowish-brown pubescence not obscuring integument, white pubescence not obscuring integument on remaining basal half, except irregular areas with brownish pubescence dorsally and laterally, and dark-brown pubescence not obscuring integument on apical half. Antennomeres IV–VI with brown pubescence not obscuring integument basally, abundant white pubescence on remaining basal half, and dark-brown pubescence not obscuring integument on apical half. Antennomeres VII–XI with brown pubescence not obscuring integument basally, white pubescence not obscuring integument on remaining basal third, and brown pubescence with white, bristly setae interspersed on remaining surface. Antennal formula based on length of antennomere III: scape = 0.84; pedicel = 0.13; IV = 0.65; V = 0.52; VI = 0.54; VII = 0.43; VIII = 0.43; IX = 0.43; X = 0.36; XI = 0.34.

Thorax. Prothorax wider than long; anterior constriction well marked; sides with large, rounded protuberance from middle to posterior sixth, slightly divergent from anterior constriction to lateral protuberance, parallel-sided on apical sixth. Pronotum moderately abruptly elevated from anterior sixth, especially laterally; abundantly, coarsely punctate, punctures slightly sparser and coarser on posterior quarter; posterior sulcus absent centrally; with dense orangish-brown pubescent macula on each side of central region close to anterior margin; moderately sparse yellowish-brown pubescence longitudinally on central region, from near anterior margin to posterior margin, this area distinctly wider from middle, with white pubescence interspersed close to posterior sulcus, except sparse brown pubescence on center of this area from basal third; dense pale-yellow pubescence laterally, with rounded inner margin, from anterior constriction to posterior sulcus, except narrow white pubescent area anteriorly and dense, white pubescent macula on inner posterior area; remaining surface with dark-brown pubescence not obscuring integument. Anterior half of sides of prothorax with dense pale-yellow pubescence close to pronotum, dense white pubescence centrally and dense pale-yellow pubescence close to prosternum; posterior half with abundant yellowish-brown pubescence close to pronotum, not reaching posterior margin, sparse dark-brown pubescence centrally and close to posterior margin, and yellowish-white pubescence not obscuring integument on remaining inferior region. Prosternum with dense pale-yellow pubescence laterally and moderately abundant whitish pubescence centrally, except narrow, longitudinal, sparse pale-yellow pubescent band centrally. Prosternal process with abundant white pubescence not obscuring integument; narrowest area 0.6 times procoxal width. Ventral surface of meso- and metathorax with sparse whitish pubescence centrally and dense yellowish-brown pubescence laterally, this pubescence paler toward central region on metaventrite. Narrowest area of mesoventral process as wide as mesocoxal width. Scutellum with abundant dark yellowish-brown pubescence anterocentrally, sparse dark yellowish-brown pubescence on remaining central area, and dark-brown pubescence not obscuring integument on remaining surface. Elytra. Coarsely punctate on anterior half, punctures more abundant toward suture, sparsely, moderately finely punctate on posterior half; centrobasal crest slightly elevated, with dense, short, bristly blackish setae dorsally; dorsal carinae slightly distinct only on anterior half; anterior half with moderately abundant yellowish-brown pubescence not obscuring integument on light integumental area, with irregular white pubescent maculae interspersed, white pubescence forming longitudinal, dashed pubescent band on dorsal carina and close to suture; dark integumental area on anterior half with dark-brown pubescence not obscuring integument; slightly oblique orangish macula on posterior half of elytra with dense pale-yellow pubescence, pubescence gradually yellowish brown toward suture, except transverse, irregular white pubescent band dorsally on its anterior margin; dark area surrounding orangish macula on posterior half with sparse brownish pubescence; apical region with sparse pale-yellow pubescence and irregular white pubescent maculae interspersed. Legs. Femora with abundant pale-yellow pubescence not obscuring integument dorsally and laterally, whiter depending on light intensity and source, except sparse dark-brown pubescence on dark basal area of femoral clubs, and abundant white pubescence not obscuring integument ventrally. Basal 2/3 of tibiae with dense yellowish-white pubescence, except sparser brownish pubescence basally and on brownish darker integumental arc; apical third with dense dark-brown pubescence and both whitish and yellowish pubescence interspersed. Dorsal surface of basal region of tarsomeres I with dense white pubescence, this area wider on metatarsomere I; remaining surface of tarsomeres I and entire tarsomeres II–V with sparse dark-brown pubescence. Metatarsomere I about as long as II–III together.

Abdomen. Ventrites with abundant white pubescence not obscuring integument; apical third of ventrite 5 with a few long, erect dark-brown setae interspersed. Apex of ventrite 5 slightly rounded.

Variation. Central area of pronotum orangish brown, with fragmented, longitudinal dark-brown band centrally; arc and ring on light basal area of tibiae dark brown; tarsomeres partially dark orangish brown dorsally.

Dimensions (mm). Total length, 3.50; prothoracic length, 0.75; anterior prothoracic width, 0.90; posterior prothoracic width, 1.10; maximum prothoracic width, 1.25; humeral width, 1.65; elytral length, 2.50. Only the holotype was measured.

Type material. Male holotype from FRENCH GUIANA: Kaw rd. (D-6) pk 38, Amazone, Nat. Lodge, Montague de Kaw, 4°33’N 52°11’W, 970’, MV light, 5–16.I.2016, Wappes, Morris & Eger leg. ( FSCA). Paratypes — FRENCH GUIANA, 1 male, Kaw rd. , pk 37, light trap, 21.XII.2000, Alain Audureau leg. ( AACP) ; 1 male, pk 27, Camp Caïman , light trap, 21.XI.2024, Anel Sugrim leg. ( AACP) ; 1 male, Regina , light trap, 09.II.2005, Nicolas Nadaud leg. ( OMCP) ; 3 males, Kaw rd. , pk 27, light trap, 05.X.2024, Anel Sugrim leg. ( OMCP) ; 1 female, light trapping, 12.VIII.2001, Michel Duranton leg. ( MDPC) .

Note: There were also three males that had been sent for identification to the late Miguel A. Monné. These specimens were destroyed during the fire that devastated the “Palácio de São Cristóvão ” ( MNRJ). The data of these specimens were: Piste de Kaw, pk 45, light trapping, 3 males, 29–30.VIII.1986, Fanny & Jean-Pierre Serais leg. ( MNHN). These specimens are not part of the type series .

Etymology. The species name “ flavomaculatus ” refers to the two large, separated elytral maculae.

Remarks. Styloleptus flavomaculatus sp. nov. differs from S. charynae Santos-Silva & Monné, 2023 (see photographs on Bezark (2025) and in Santos-Silva & Monné (2023)) as follows: frons slightly wider than 1.5 times the length of lower eye lobe; genae 0.7 times as long as lower eye lobe; distance between upper eye lobes equal to about length of lower eye lobe; and large posterior pubescent macula on elytra slightly oblique, not reaching suture. In S. charynae , the frons is slightly wider than the length of the lower eye lobe, genae 0.4 times as long as lower eye lobe, distance between upper eye lobes equal to about half the length of the lower eye lobe, and the large posterior pubescent macula on elytra distinctly oblique and reaching suture.