Cycnidolon antonkozlovi Santos-Silva & Nascimento, 2019

Santos-Silva, Antonio, Nascimento, Francisco E. De L. & Kozlov, Anton Olegovich, 2019, The megadiverse fauna of Neotropical Cerambycidae (Coleoptera): Notes, descriptions, new records, new species, and revalidations, Zootaxa 4603 (3), pp. 441-472 : 463-464

Cycnidolon antonkozlovi Santos-Silva & Nascimento , sp. nov.

( Figures 74–78 )

Description. Male. Head black except brown postclypeus, genae, depressed anterior are of gulamentum, and narrow posterior area of gulamentum; mouthparts yellowish brown; labrum light reddish brown; basal 2/3 of mandibles reddish brown, and distal third black; scape, pedicel, and antennomeres III–IV dark brown dorsally, more reddishbrown near apex, dark reddish brown ventrally, lighter near apex; antennomeres V–X (missing part of antennomere X and entire XI in left antenna; missing part of antennomere IV and antennomeres V–XI in right antenna) light reddish brown basally, brown on remaining surface; prothorax black except dark reddish-brown anterior area of prosternum, and mostly of prosternal process; ventral surface of meso- and metathorax mostly orangish, darker laterally; elytra black except oblique yellowish-brown macula near base, oblique dorsally, widened on inclined area, oblique whitish macula starting on basal sixth, not reaching suture, reaching lateral margin, whitish band slightly before midlength, transverse dorsally, slightly oblique on inclined area, and narrow yellowish-brown area on apex; peduncle of profemora light reddish brown (more yellowish-brown on some areas); club of profemora brown dorsally and on superior area of sides, reddish-brown ventrally and inferior area of sides; peduncle of meso- and metafemora yellowish-brown (yellower depending on light intensity), and club dark brown (narrow distal area reddish brown); protibiae dark brown except slight lighter distal area; meso- and metatibiae dark brown on basal 3/4, yellowish-brown on distal quarter; protarsi mostly dark brown; meso- and metatarsi yellowish-brown; abdominal ventrites I–III dark brown; ventrite IV dark brown basally, gradually lighter toward apex; abdominal ventrite V reddish-brown basally, gradually yellowish brown toward apex.

Head. Frontal plate triangular, with a few fine punctures posteriorly, very finely striate on remaining surface; remaining surface of frons finely, moderately abundantly punctate centrally, sparser laterally; frontal plate glabrous, and remaining surface with whitish pubescence not obscuring integument, except glabrous narrow area along median groove. Vertex finely, densely asperate; with whitish pubescence partially obscuring integument. Area behind upper eye lobes with sculpturing as on vertex superiorly, finely, sparsely punctate posteriorly; area close to eye with sparse whitish pubescence superiorly, glabrous posteriorly; remaining surface with sculpturing and pubescence as on vertex. Area between eye lobes and behind lower eye lobes smooth, except a few fine punctures close to lower eye lobes; glabrous except behind and close to lower eye lobe with a few short, decumbent whitish setae, and a few long, erect yellowish setae. Genae finely, sparsely punctate; with short, sparse, decumbent whitish pubescence except glabrous apex. Antennal tubercles smooth, glabrous frontally, with sculpturing and pubescence as on vertex on remaining surface, except smooth and glabrous apex. Median groove distinct from clypeus to area between antennal tubercles. Gulamentum smooth on wide posterior area except a few very fine punctures laterally; anterior area depressed, transversely striate-punctate; wide posterior area glabrous, except a few short whitish setae near depressed area; depressed area with short, sparse, decumbent whitish setae (sparser centrally), interspersed with long, erect setae of same color. Eye lobes distinctly separated; distance between upper eye lobes 0.41 times length of scape; in frontal view, distance between lower eye lobes 0.69 times length of scape. Antenna (from base of scape to apex of antennomere IX) 1.95 times elytral length, reaching elytral slightly before midlength of antennomere VIII. Scape with whitish pubescence not obscuring integument, except glabrous distal area of dorsal surface; with sparse whitish pubescence laterally (glabrous on distal area), and nearly glabrous ventrally; with long, erect, sparse yellowish setae dorsally, and a few similar setae on posterior area of sides and ventral surface. Pedicel with whitish pubescence not obscuring integument, interspersed with long, erect yellowish setae. Antennomeres III–IV distinctly tumid, not carinate; with whitish pubescence not obscuring integument, except glabrous basal area (this area larger ventrally); with a few short, erect yellowish setae dorsally, and long, erect yellowish setae ventrally. Antennomeres V–VI carinate dorsally; with whitish pubescence not obscuring integument, interspersed with moderately long, erect yellowish setae dorsally, and distinctly long yellowish setae ventrally. Remaining antennomeres not carinate dorsally, with whitish pubescence not obscuring integument, interspersed with moderately long, erect yellowish setae (more whitish depending on light intensity). Antennal formula (ratio) based on length of antennomere III: scape = 0.85; pedicel = 0.24; IV = 0.67; V = 0.83; VI = 1.02; VII = 1.13; VIII = 1.09; IX = 1.00.

Thorax. Prothorax 1.65 times longer than wide; anterior and posterior constrictions well-marked. Pronotum with five gibbosities, one on each side slightly after apex of anterior third, one on side of base of posterior third, another centrally between anterolateral gibbosities; microsculptured except smooth anterior area, and on central gibbosity; with fine, sparse punctures anteriorly, and a few punctures on remaining surface, from each emerges long, erect, yellowish setae; with whitish pubescence partially obscuring integument, except glabrous anterior area, narrow posterior area, and central gibbosity. Sides of prothorax with whitish pubescence partially obscuring integument, this area reaching procoxal cavity posteriorly, gradually, distinctly narrowed toward anterior area (not reaching anterior margin), interspersed with a few long, erect yellowish setae; remaining surface glabrous. Prosternum with whitish pubescence not obscuring integument close to procoxal cavities, with a few short whitish setae on remaining surface. Prosternal process with sparse whitish pubescence, less conspicuous on posterior area. Ventral surface of meso- and metathorax with whitish pubescence not obscuring integument, slightly denser laterally. Scutellum with whitish pubescence not obscuring integument. Elytra. Coarsely, sparsely punctate, with long, erect yellowish setae emerging from some of those punctures; remaining surface with minute, sparse punctures; basal half glabrous; posterior half with whitish pubescence, sparer on some oblique areas; apex with long, acute projection at outer angle, with short, triangular projection at sutural angle. Legs. Femoral peduncles and ventral surface with sparse whitish pubescence (nearly glabrous on profemora), and remaining surface with abundant whitish pubescence, not obscuring integument, interspersed with long, erect yellowish setae. Tibiae with whitish pubescence not obscuring integument, except posterior third of ventral surface with bristly, short, yellowish setae, interspersed with long, erect yellowish setae. Metatarsomere I as long as II–III together.

Abdomen. Anterolateral area of ventrites I–II with whitish pubescence partially obscuring integument, interspersed with a few long, erect yellowish setae, and remaining surface with a few short, decumbent whitish setae; ventrites III–IV with whitish pubescence on anterior area (sparser centrally), interspersed with long, erect yellowish setae, glabrous posteriorly; ventrite V glabrous on semicircular centrobasal area and posteriorly, with sparse whitish pubescence on remaining surface, interspersed with long, erect yellowish setae; posterior margin of ventrite V nearly truncate.

Dimensions (mm). Total length, 8.30; prothoracic length, 1.80; anterior prothoracic width, 1.05; posterior prothoracic width, 1.10; humeral width, 1.55; elytral length, 4.95.

Type material. Holotype male from COLOMBIA, Huila: 25 km SW Gigante (02º20’34”N / 75º35’43”W; (777 m), 17.V.2018, V. Sinyaev col. ( MZSP).

Remarks. Cycnidolon antonkozlovi sp. nov. is similar to C. binodosum Bates, 1870 , but differs as follows: antennomeres III and IV ( Fig. 78 ) gradually narrowed toward apex, not notched posteriorly; antennomere IV shorter, and less tumid; antennomere V proportionally shorter. In C. binodosum (see photograph of the holotype in Bezark 2018a), the antennomeres III and IV ( Fig. 79 ) are more abruptly narrowed posteriorly, and somewhat notched, and antennomere V is proportionally longer.

Cycnidolon antonkozlovi can be included in the alternative of couplet “15” from Martins & Galileo (2007) (translated):

15(14). Only antennomere III tumid in male; anterior macula of the elytra wide, triangular, not band-shaped. Peru, Venezuela, Guyana, French Guiana, Brazil (Amapá, Amazonas, Pará).............................. C. approximatum ( White, 1855)

- Antennomeres III–IV tumid in male; anterior macula of the elytra narrow, band-shaped (not considering the yellowish macula near humerus).....................................................................................15’

15’(15). Apex of antennomeres III–IV abruptly narrowed, somewhat notched ( Fig. 79 ). Brazil (Amazonas, Pará)............................................................................................... C. binodosum Bates, 1870

- Apex of antennomeres III–IV gradually narrowed, not notched ( Fig. 78 ). Colombia (Huila)....... C. antonkozlovi sp. nov.

Etymology. The new species is named in honor of our friend Anton Olegovich Kozlov, third author of this paper, for donating the holotype for the MZSP collection.

Figures

FIGURES 68–79. 68–69) Blabia intricata, male: 68) Head, frontal view; 69) Head, frontal view, paratype. 70–73) Blabia strandiella, holotype: 70) Head, frontal view; 71) Dorsal habitus; 72) Lateral habitus; 73) Head, oblique view. 74–78) Cycnidolon antonkozlovi, holotype male: 74) Dorsal habitus; 75) Ventral habitus; 76) Lateral habitus; 77) Head, frontal view; 78) Antennomeres III–IV. 79) C. binodosum, holotype, antennomeres III–IV, illustration from Martins (1969). Figures 70–73 by Eugenio H. Nearns (USNM).