Nealcidion flavoviride, Vlasak & Santos-Silva, 2022

Vlasak, Josef & Santos-Silva, Antonio, 2022, Five new species of Nealcidion Monné, 1997 from Ecuador (Coleoptera, Cerambycidae, Lamiinae), Zootaxa 5209 (5), pp. 535-554 : 539-542

Nealcidion flavoviride sp. nov.

( Figs 7–11 )

Description. Holotype male. Frons and area behind eyes dark brown; antennal tubercles brown, except dark-brown spot on dorsal base; vertex brown, darker than on antennal tubercle; genae dark brown, slightly lighter toward apex and clypeus; ventral surface of head dark brown laterally, gradually brown toward center; ventral mouthparts mostly reddish brown; anteclypeus mostly dark yellowish brown, with irregular reddish-brown areas interspersed; labrum dark brown on center of posterior half, dark reddish brown on sides of posterior half, yellowish brown on anterior half; scape, pedicel, and antennomere III brown, lighter depending on light intensity, except darker apex; antennomeres IV–VI reddish brown, more dark orangish brown depending on light intensity, except darker apex; antennomeres VIII–XI reddish brown. Pronotum dark brown, except brown area close to anterior and posterior margins, and several irregular black maculae, the innermost forming irregular row on each side of middle. Sides of prothorax dark brown. Prosternum, prosternal process, mesoventrite, mesoventral process, and center of metaventrite brown, more dark reddish brown depending on light intensity, except blackish margins; mesanepisternum, mesepimeron, metanepisternum, and sides of metaventrite dark brown. Scutellum light brown, except blackish sides of anterior half. Elytra brown basally, mostly dark brown on remaining anterior 2/3, gradually lighter toward apex on posterior quarter; with three large, irregular black maculae, one oblique, located on anterior quarter from centrobasal crest to near suture, including the centrobasal crest, one laterally on middle of elytra, another longitudinal, located on center of dorsal surface after middle of elytra. Coxae blackish basally, gradually dark yellowish brown toward trochanter; trochanters and femoral peduncles pale yellow; femoral clubs greenish, except dark greenish-brown maculae near base of dorsal surface and outer surface. Tibiae brown with wide pale-yellow ring centrally, not reaching ventral surface on protibiae. Tarsomeres I orangish except blackish posterior region, dark area longer on protarsomere I; tarsomeres II–III blackish, except reddish brown apices of lobes of III; tarsomere IV and anterior 2/3 of V light reddish brown, and posterior third of V blackish. Ventrites mostly reddish brown with irregular dark-brown areas interspersed.

Head. Frons abundantly, minutely punctate; with abundant greenish pubescence not obscuring integument, except glabrous median groove, and one long, erect brown seta on each side close to eyes. Vertex and area behind upper eye lobes with dense yellowish-green pubescence obscuring integument, except glabrous median groove, glabrous diamond-shaped central area between antennal tubercles and upper eye lobes, and dark-brown pubescent macula on each side close to base of antennal tubercles. Antennal tubercles with abundant light yellowish-brown pubescence not obscuring integument, pubescence more greenish basally. Area behind lower eye lobes with dense yellowish-green pubescence close to eye, pubescence slightly sparser toward ventral surface, glabrous close to prothorax. Area bordering anterior margin of upper eye lobes with dense yellowish-green pubescence. Genae with yellowish-green pubescence close to eye, pubescence gradually sparser toward clypeus and toward glabrous apex; with a few long, erect dark setae interspersed. Gulamentum smooth, glabrous, except depressed anterocentral region with abundant pale brownish-yellow pubescence and long, erect dark setae interspersed. Wide central are of postclypeus with abundant greenish pubescence close to frons, and sparse pubescence of same color close to anteclypeus, except subglabrous sides; with long, erect setae interspersed, setae black basally, gradually pale toward apex. Sides of postclypeus glabrous. Labrum with sparse yellowish-white pubescence on posterior half, pubescence yellower laterally, glabrous on anterior half, except fringe of golden setae on anterior margin; with long, erect setae interspersed on posterior half, setae blackish basally, gradually paler toward apex. Distance between upper eye lobes 0.12 times distance between outer margins of eyes; in frontal view, distance between lower eye lobes 0.53 times distance between outer margins of eyes. Antennae 2.35 times elytral length, reaching elytral apex at base of antennomere VI. Scape with abundant yellowish-white pubescence not obscuring integument, pubescence denser ventrally; with erect black setae ventrally, setae sparse and short on anterior half, longer and abundant on posterior half. Pedicel with abundant yellowish-white pubescence on anterior 2/3, sparser on posterior third, especially dorsally; with a few long, erect black setae ventrally. Antennomeres with minute whitish pubescence not obscuring integument, and short, both decumbent and erect yellowish-white setae interspersed; antennomeres III–V with sparse, short black setae interspersed, dark gradually sparser toward V and denser on apex of III; ventral apex of antennomeres VI–VII with a few short black setae; apex of antennomere XI with abundant, short yellowish-white setae directed backward. Antennal formula based on length of antennomere III: scape = 0.95; pedicel = 0.09; IV = 0.84; V = 0.72; VI = 0.63; VII = 0.52; VIII = 0.52; IX = 0.49; X = 0.45; XI = 0.48.

Thorax. Prothorax wider than long; sides with rounded projection about middle. Pronotum with slightly elevated gibbosity on each side of anterior third and elongated, slightly elevated gibbosity on center of posterior half; somewhat sparsely, coarsely punctate, punctures absent on gibbosities, coarser and denser on sides of anterior half; with dense yellowish-green pubescence, except sparser and paler yellowish-green pubescence close to anterior and posterior margins, glabrous on top of central gibbosity, abundant and black on anterolateral gibbosities, and sparser and dark brown on remaining dark areas; with a few long, erect dark setae near posterolateral angles. Sides of prothorax sparsely, coarsely punctate; with dense yellowish-green pubescence with irregular brownish pubescent maculae and subglabrous areas interspersed. Prosternum with dense yellowish-green pubescence laterally, gradually sparser and slightly yellowish toward central area. Prosternal process with yellowish-white pubescence not obscuring integument; narrowest area 0.34 times procoxal width. Mesoventrite with somewhat sparse yellowish-white pubescence and sides with dense yellow pubescence. Mesanepisternum, mesepimeron, and metanepisternum with dense greenish pubescence, pubescence slightly sparser on center of mesanepisternum. Sides of metaventrite with dense greenish pubescence, except anterior third with slightly sparser greenish pubescence; central area with abundant yellowishwhite pubescence partially obscuring integument, pubescence longer than on sides. Scutellum with somewhat dense yellowish-green pubescence on center of anterior half, sparser, yellowish on center of posterior half and entire apex, and dark-brown pubescence on sides of anterior 2/3. Elytra. Centrobasal crest elevated, oblique anteriorly, slightly rounded on remaining surface, abruptly inclined apically, and with somewhat abundant, suberect black setae dorsally; humeral carina well marked from near humerus to posterior third; with slightly tumid longitudinal band from apex of centrobasal crest to posterior quarter, not forming a distinct carina; apex widely concave, with outer angle forming long triangular projection and sutural angle forming short and wide triangular projection; abundantly, coarsely punctate on anterior third, punctures gradually finer and sparser toward apex on posterior 2/3; with dense yellowish-green pubescence, pubescence dense and slightly yellower dorsally, forming a band from near humerus to posterior blackish longitudinal macula; dorsal area of humeral region with sparser brownish pubescence; sides of anterior third with large brownish pubescent macula laterally; posterior third with abundant, irregular, both small and large brownish pubescent maculae interspersed, area between humeral carina and epipleural margin with both yellowish-green and brownish pubescence interspersed from anterior fifth to after middle; dark integumental maculae with black pubescence, pubescence denser on longitudinal black integumental band located after middle; epipleural margin with sparse, short, erect yellowish-white setae. Legs. Femoral peduncles with abundant whitish pubescence not obscuring integument; femoral clubs with dense greenish-yellow pubescence, except sparser, brownish pubescence on darker integumental area, with decumbent yellowish setae interspersed. Protibiae with greenish-yellow pubescence basally on dorsal and lateral surfaces, glabrous basally on ventral surface, with sparse yellowish pubescence on remaining dark basal third, pubescence almost absent dorsally, with abundant yellowishwhite pubescence on pale-yellow ring, and sparse brownish pubescence on posterior dark area, except posterior quarter of dorsal surface with abundant yellowish-brown pubescence, yellowish-brown pubescence on apex of sides, and dense, bristly yellowish-brown pubescence on ventral surface of posterior half. Mesotibiae with dense yellow pubescence basally, brownish pubescence with short, decumbent yellowish setae interspersed on remaining basal third, with dense yellowish-white pubescence on pale-yellow ring, and brownish pubescence with decumbent yellowish setae interspersed on posterior dark area, except dorsal surface with abundant, thick black setae, and posterior quarter of ventral surface with abundant, bristly yellowish-brown pubescence, and lateral area close to dorsal sulcus with whitish pubescence; with sparse small tubercles on ventral surface. Metatibiae with yellowish pubescence not obscuring integument basally, both brownish and yellowish-white pubescence not obscuring integument on remaining basal dark area, abundant whitish pubescence on central pale-yellow ring, and somewhat abundant, short, erect, thick black setae on posterior dark area, except ventral surface with brownish pubescence, gradually bristly and yellowish brown toward apex. Metatarsomere I almost twice length II–III together.

Abdomen. Ventrites with dense yellowish pubescence laterally, more yellowish green depending on light intensity, slightly sparser on ventrite 5, and abundant whitish pubescence not obscuring integument centrally; apex of ventrite 5 concave.

Female. Similar to male, differing by body stouter, femoral clubs slightly narrower, and antennae shorter, 2.2 times elytral length, reaching elytral apex at about middle of antennomere VI.

Dimensions (mm) (Holotype male/ paratype male/ paratype female). Total length, 9.75/8.60/9.40; prothoracic length, 1.65/1.40/1.35; anterior prothoracic width, 1.65/1.55/1.70; posterior prothoracic width, 2.00/1.85/2.05; maximum prothoracic width, 2.35/2.15/2.35; humeral width, 3.30/2.95/3.30; elytral length, 7.00/6.25/7.05.

Type material. Holotype male from ECUADOR, Pichincha: Cascadas de Nambillo , 1400 m, Mindo, 20.VI.2021, J. Vlasak leg. ( MZSP) . Paratype male and paratype female, same data as holotype ( JVCO) .

Etymology. The specific epithet “flavoviride” (from Latin flavus (yellow) and viridis (green)) refers to the yellowish-green pubescence of this species.

Remarks. Nealcidion flavoviride sp. nov. belongs to the group of species without a distinct longitudinal carina on dorsal surface of the elytra. The conspicuous yellowish-green pubescence clearly distinguishes it from other known species of the genus.

Figures

FIGURES 7–11. Nealcidion flavoviride sp. nov., holotype male: 7) Dorsal habitus; 8) Ventral habitus; 9) Lateral habitus; 10) Head and pronotum; 11) Centrobasal crests.