Onalcidion antonkozlovi, Monné & Nascimento & Monné & Santos-Silva, 2019

Monné, Miguel A., Nascimento, Francisco E. De L., Monné, Marcela L. & Santos-Silva, Antonio, 2019, New records, new genera, and new species in Acanthocinini (Lamiinae) from the Neotropical region, and new synonym in Cerambycinae (Coleoptera, Cerambycidae), Zootaxa 4624 (4), pp. 491-506 : 500-501

Onalcidion antonkozlovi sp. nov.

( Figures 18–21 )

Description. Female. Integument mostly dark brown, blackish in some areas; basal 2/3 of antennomere III brownish, and distal third gradually darkened dark-brown toward apex; basal half of antennomere IV brownish (more dark reddish brown depending on light intensity), and distal half gradually darkened toward dark-brown apex; basal third of antennomeres V–VI reddish-brown, and distal 2/3 gradually darkened toward dark-brown apex; basal third of antennomere VII yellowish-brown, and distal 2/3 dark-brown; basal quarter of elytra with distinct V-shaped band, starting at centro basal crests, distinctly contrasting with surrounding areas; peduncle of femora, and basal half of tarsomeres I reddish; central area of tibiae with reddish ring; apex of abdominal ventrites I–IV reddish-brown.

Head. Frons transverse, densely micropunctate; with yellowish-brown pubescence not obscuring integument. Vertex with sculpturing and pubescence as on frons, except glabrous cross-shaped central area between antennal tubercles and upper eye lobes. Antennal tubercles densely micropunctate basally, finely, abundantly punctate on remaining surface; with yellowish-brown pubescence not obscuring integument, distinctly sparser dorsally. Area behind upper eye lobes finely punctate, with moderately dense yellowish-brown pubescence close to eyes, smooth, glabrous toward prothorax; area behind lower eye lobes with narrow yellowish-brown pubescence close to eye, gradually bristly toward ventral side, glabrous on remaining surface. Genae minutely striate-punctate, except smooth distal area; with sparse yellowish-brown pubescence close to eye, nearly glabrous on remaining surface, except glabrous smooth area. Postclypeus with moderately bristly yellowish-brown pubescence centrally, nearly glabrous on sides of wide central area, glabrous laterally. Labrum coplanar with anteclypeus at posterior third, inclined at anterior 2/3; densely, minutely punctate interspersed with fine punctures on posterior 2/3, nearly smooth on anterior third; with short, decumbent, sparse grayish-white pubescence interspersed with moderately short yellowish-brown setae directed forward. Gulamentum smooth, glabrous on wide posterior area, depressed, minutely punctate, with grayish-white pubescence anteriorly, and a few long, erect brownish setae in anterior margin. Distance between upper eye lobes 0.23 times length of scape; in frontal view, distance between lower eye lobes 0.53 times length of scape. Antennae (missing antennomeres VIII–XI in left antenna, V–XI in right antenna); present antenomeres 1.5 times elytral length, reaching elytral apex at distal sixth of antennomere VI; scape, pedicel and dark areas of antennomeres with brownish pubescence not obscuring integument, less conspicuous on antennomeres; light areas of antennomeres with pale-yellow pubescence; scape with long, erect, sparse brownish setae at distal quarter of ventral surface; pedicel and antennomeres III–IV with long, erect brownish setae ventrally, distinctly sparser in IV. Antennal formula (ratio) based on length of antennomere III: scape = 1.02; pedicel = 0.14; IV = 0.91; V = 0.83; VI = 0.75; VII = 0.68.

Thorax. Prothorax with moderately small, conical tubercle at distal third, with apex obliquely directed upward; with narrow constriction anteriorly, slightly, gradually widened from anterior margin to lateral tubercles, narrowed from lateral tubercles to posterior margin. Pronotum with three distinct tubercles, one on each side, oblique, placed from about posterior quarter to near anterior margin, wider posteriorly, another subelliptical centrally, from posterior quarter to slightly before midlength; with row of coarse, deep punctures near posterior margin (punctures less aligned centrally), coarsely, sparsely punctate on remaining surface, except smooth tubercles; pubescence mostly greenish-brown, interspersed with yellowish-brown and pale-yellow pubescence laterally and on transverse posterior quarter, slightly longer on anterocentral area between tubercles, except nearly glabrous anterior top of lateral tubercles and top of central tubercle with small, dense tuft with white setae on sides of apex of anterior third, oblique whitish pubescent macula on each side of near sides of prothorax, placed at about anterior third, and yellowish pubescent spot on each side, close to anterior margin (close each other than tufts with white setae). Sides of prothorax with grayish-brown pubescence partially obscuring integument, except sparse pubescence close to anterior and posterior margins. Ventral surface of thorax with yellowish-brown pubescence not obscuring integument (more grayish-white depending on light intensity). Scutellum with sparse grayish-brown pubescence. Elytra. Coarsely, moderately abundantly punctate on anterior half, gradually sparser on posterior half; centro basal crest slightly elevate, with slightly sparse, moderately long dark setae on top; with three slightly marked carina, innermost from about midlength to distal quarter, one humeral, reaching about distal quarter of elytra, another laterally, from near humerus to about distal third; apex obliquely truncate; with long, erect, thick dark setae throughout. Pubescence as follows: humerus with slightly conspicuous greenish-brown pubescence; circum-scutellar area with sparse yellowish-brown pubescence; V-shaped anterior area with brownish pubescence; wide, oblique yellowish pubescent band on anterior third, starting near humerus, sparsely projected toward anterior margin between humerus and scutellum; irregularly yellowish on wide central area, interspersed with also irregular lighter pubescence, and subcircular spots with sparse, brownish pubescence; white longitudinal pubescent band close to suture, from posterior margin of Vshaped anterior area to near midlength; pale-yellow, sparse pubescence covering distal quarter, obliquely projected base of posterior third (anterior margin of this area with yellowish-white pubescence, preceded by oblique, irregular brownish sparsely pubescent band); with short, narrow, longitudinal maculae with yellowish pubescence on carinae.

Legs. Femora with yellowish pubescence, moderately dense on club, except sparse basal area, and brownish pubescence about centrodorsal area (less conspicuous on profemora). Protibiae with sparse yellowish pubescence on basal dark area, distinctly denser on central light area, sparse dorsally between light area and distal quarter, denser on distal dorsal quarter, yellowish-brown, bristly on ventral surface of distal half; with a few long, erect yellow setae dorsally and laterally. Meso- and metatibiae with sparse yellowish pubescence on dark basal area, especially dorsally, with dense yellowish pubescence on light central area, and moderately sparse pale-yellow pubescence on distal dark area, except dense yellowish-brown pubescence on dorsal sulcus of mesotibiae; with thick, erect brownish setae on dorsal surface of distal half; with a few long, erect yellow setae throughout. Light area of tarsomeres I with yellowish pubescence; remaining surface of tarsomeres with brownish pubescence. Metatarsomere I about twice length of II–III together.

Abdomen. Ventrites with pale-yellow pubescence not obscuring integument (more grayish-white depending on light intensity); apex of ventrite V truncate at apex, with long, spiniform projection at each side.

Dimensions (mm). Total length, 7.35; prothoracic length, 1.15; anterior prothoracic width, 1.25 (1.40, slightly after anterior margin); posterior prothoracic width, 1.40; maximum prothoracic width (between apex of lateral tubercles), 1.80; humeral width, 2.40; elytral length, 5.10.

Type material. Holotype female from COLOMBIA, Santander: NE Bucaramanga (near Morro Ventanas; 7º08’43”N / 73º01’52”W; 2250 m), 13–15.IV.2017, Sinyaev & Pinilla col. ( MZSP).

Remarks. According to Monné (1990), Onalcidion Thomson, 1864 does not have tubercles on the pronotum. Although this is true of the type species, O. pictulum (White, 1855) , as well as O. obscurum Gilmour, 1957 , and O. fibrosum Monné & Martins, 1976 , currently, there are two species with distinct tubercles on pronotum included in the genus: O. tavakiliani Audureau, 2013 , and O. lingafelteri Audureau, 2018 . Thus, as the genus is clearly in need of revision, we prefer not to erect a new genus to include those species with distinct tubercles on pronotum.

The general appearance of Onalcidion antonkozlovi sp. nov. resembles that of O. lingafelteri , but differs as follows: elytral apex obliquely truncate; dorsal surface of elytra with white pubescent macula on anterior half. In O. lingafelteri , the elytral apex has the outer angle triangularly projected, and the anterior half of the elytra lacks a white pubescent macula. Furthermore, the holotype female of O. lingafelteri has a distinct spot with dark and erect setae on the dorsal surface of posterior half, which suggests it belongs to Trichalcidion Monné & Delfino, 1981 , and the abdominal ventrite V is proportionally shorter and wider basally.

Etymology. The species is named in honor of Anton O. Kozlov, who sent the specimen for study and donated the holotype for MZSP collection.

Figures

FIGURES 18–25. 18–21, Onalcidion antonkozlovi, holotype female: 18, Dorsal habitus; 19, Ventral habitus; 20, Lateral habitus; 21, Head, frontal view. 22–25, Leptocometes antonkozlovi, holotype male: 22, Head, frontal view; 23, Dorsal habitus; 24, Ventral habitus; 25, Lateral habitus.