Rosalba stenodesma Joly, Tavakilian, Santos-Silva & Galileo, 2018

Santos-Silva, Antonio, Galileo, Maria Helena M., Joly, Luis J. & Tavakilian, Gérard L., 2018, The genus Rosalba Thomson, 1864 (Coleoptera, Cerambycidae, Lamiinae, Apomecynini), Zootaxa 4387 (2), pp. 201-258 : 216-218

Rosalba stenodesma Joly, Tavakilian, Santos-Silva & Galileo , sp. nov.

( Figs. 33–36 , 92 )

Description. Male. Integument dark brown; mouthparts and labrum reddish brown; antennae dark brown.

Head. Frons finely, sparsely punctate; with yellowish white pubescence not obscuring integument, denser close to eyes; with long, erect, sparse dark brown setae throughout. Area between antennal tubercles with punctures coarser than on frons; with yellowish white pubescence toward frons, yellow toward upper eye lobes (not obscuring integument); with long, erect, sparse dark brown setae. Area between upper eye lobes with yellow pubescence obscuring integument, connected to narrow band also with yellow pubescence behind and close to upper eye lobes. Remaining surface of vertex and area behind upper eye lobes with slightly conspicuous, sparse yellowish pubescence except yellow pubescence centrally on vertex close to prothoracic margin; with long erect, sparse dark brown setae close to eyes. Median longitudinal groove carinate on vertex. Area behind lower eye lobes with yellow pubescence partially obscuring integument, interspersed with long, erect dark brown setae. Antennal tubercles minutely, moderately abundantly punctate; with yellowish white pubescence, more yellow toward upper eye lobes, not obscuring integument. Area between antennal socket and eyes with narrow, dense band of yellow pubescence, mainly on emarginated area of eyes. Submentum narrow, depressed close to gula, elevated toward mentum; with short, decumbent, moderately sparse yellowish white setae on depressed area, with some long, erect, dark brown setae on elevate area. Postclypeus with yellowish white pubescence partially obscuring integument on large central area, glabrous laterally; with long, sparse, erect dark brown setae. Labrum convex and coplanar with anteclypeus on basal half, inclined on distal half; with slightly conspicuous yellowish pubescence interspersed with long, erect, moderately abundant yellowish and dark brown setae on coplanar area; with sparse yellowish pubescence on inclined area. Distance between upper eye lobes 0.03 times length of scape (almost contiguous); in frontal view, distance between lower eye lobes 0.45 times length of scape. Antennae 2.7 times elytral length, reaching elytral apex at basal seventh of antennomere VII; with decumbent, yellowish pubescence not obscuring integument; dorsal surface of scape with long, erect, sparse dark brown setae; antennomeres III–XI with short, erect, yellowish setae throughout; ventral surface of scape, pedicel and antennomeres III–X with long, erect dark brown setae (longer, more abundant on basal segments, gradually shorter, sparser toward X); antennal formula (ratio) based on antennomere III: scape = 0.90; pedicel = 0.12; IV = 1.21; V = 1.10; VI = 1.12; VII = 1.10; VIII = 1.10; IX = 1.07; X = 1.07; XI = 1.26.

Thorax. Prothorax 1.2 times wider than long; sides sub-parallel with blunt, distinct tubercle at about midlength. Pronotum coarsely, abundantly punctate; with three moderately wide, longitudinal bands of yellow, central slightly widened at midlength; with irregular band of whitish pubescence between yellow bands. Sides of prothorax coarsely, moderately abundantly punctate (punctures finer, sparser than on pronotum); with wide longitudinal band of yellow pubescence at about middle, basally projected toward procoxal cavity; with irregular band of whitish pubescence between yellow band and that also yellow on pronotum. Prosternum with some fine punctures centrally, nearly smooth on remaining surface; with yellowish white pubescence not obscuring integument. Prosternal process coarsely, moderately abundantly punctate; with yellowish white pubescence not obscuring integument interspersed with long, abundant, erect, dark brown and yellowish setae near apex. Mesoventrite notably transversely depressed close to apex of prosternal process; with slightly conspicuous yellowish white pubescence on depressed area, more conspicuous laterally. Mesanepisternum with yellowish white pubescence close to mesoventrite, gradually denser, distinctly yellow toward elytra. Mesepimeron with yellow pubescence obscuring integument. Metanepisternum with dense yellow pubescence. Metaventrite with slightly conspicuous longitudinal band of yellow pubescence close to lateral curvature (pubescence distinctly less yellow than on metanepisternum); remaining surface with yellowish white pubescence partially obscuring integument, mainly on central area. Scutellum with yellow pubescence (partially lost in the holotype). Elytra. Coarsely, abundantly punctate on basal half, gradually finer, sparser toward apex (nearly smooth on distal quarter); with 4 longitudinal yellow pubescent bands starting on base, thinly margined with sparse whitish pubescence, innermost and fourth fused near apex, innermost oblique from base to near suture on basal third, second ending at base of distal seventh, narrowed before its midlength, third slightly widened at about apex of basal third, outermost slightly narrowed at its midlength; with another narrow band of yellow pubescence close to suture on basal fifth, gradually white toward midlength; remaining surface nearly glabrous, except narrow yellowish white pubescence close to yellow bands; apex slightly obliquely truncate, with outer angle triangularly projected. Legs. Femora with yellowish white pubescence partially obscuring integument. Metatarsomere I as long as 0.65 times II–III together; metatarsomere V (without claws) as long as I–III together.

Abdomen. Ventrites with longitudinal band of yellow pubescence laterally, less conspicuous from IV; remaining surface with whitish pubescence partially obscuring integument; distal third of ventrite V with long, nearly erect dark brown setae; apex of ventrite V truncate, slightly emarginate centrally.

Female. It differs from male by the slightly shorter antennae, reaching elytral apex at apex of antennomere VII.

Variations. Integument black or almost black; in one paratype the lateral bands of yellow pubescence on pronotum are only indicated, and the bands of whitish pubescence are absent.

Dimensions in mm (holotype male/ paratype males/ paratype females). Total length, 9.94/8.68-1020/9.52– 10.50; prothorax: length, 1.78/1.34–1.80/1.48–184; anterior width, 1.93/1.24–1.80/1.50–1.84; posterior width, 1.97/1.43–2.00/1.78–2.08; widest prothoracic width, 2.17/1.51–2.10/1.86–2.13; humeral width, 2.76/2.09–2.65/ 2.65–298; elytral length, 7.04/6.27–7.50/6.81–7.58.

Type material. Holotype male from VENEZUELA, Aragua: Rancho Grande ( Portachuelo ; 10°20’54,76”N / 67°41’15,93”W; 1100 m), 28.V.1980, J. A. Clavijo & A. Chacón col. ( MIZA) . Paratypes—VENEZUELA, Aragua: Rancho Grande ( Portachuelo ; 10°20’54,76”N / 67°41’15,93”W; 1100 m), 1 male, 3.IX.1974, F. Fernández & C. J. Rosales col. ( MZSP) ; 1 female, 27.IX.1978, J. Clavijo & A. Chacón col. (MZSP); 1 male, 11.V.1980, F. Fernández Y. & J. A. Clavijo col. (MIZA); 1 female, 22.V.1981, J. A. Calvijo & J. L. García col. (MIZA); 1 female, VI.1975, Fam. Romero col. (CFRM); 1 female, 20.V.1974, F. Fernández Y. & C. J. Rosales col. (MIZA); 1 female, 14.VIII.1976, J. Salcedo & J. M. González col. (MIZA); 1 female, 19. VI.1 975, J. Clavijo & I. Jaspe col. (MZSP). CarabΟbΟ: Montalbán , 2 males, 8.V.1973, B. Bechyne col. ( MIZA) . FRENCH GUIANA: Saül (on wing), 1 male, no date indicated, Patrick Arnaud col. [ex collection IRD#626] ( MNHN) .

Etymology. The specific epithet is derived from Greek, στενὸς (narrow, constricted), and δέσΜΟς (ribbon). The name refers to the constriction in the proximal half of two bands of the elytron.

Remarks. RΟsalba stenΟdesma sp. nov. is similar to R. birai sp. nov. by the elytral drawing, but differs as follows: prothorax with sides sub-parallel, with distinct tubercle at about midlength; pronotal and elytral bands of yellow pubescence wider; scutellum entirely with yellow pubescence; femora ticker. In R. birai , the prothorax has the sides convergent from base to apex, lateral tubercle of prothorax is slightly conspicuous, pronotal and elytral bands of yellow pubescence are narrower, scutellum has yellow pubescence only centrally, and the femora are slender.

Figures

FIGURES28–34.28, Rosalba clineisp.nov., holotype female, ventralview.29–32, Rosalba biraisp.nov., holotype male:29, dorsal habitus; 30, head, frontal view; 31, ventral habitus; 32, lateral habitus. 33–34, Rosalba stenodesma sp. nov., paratype male:33, head, frontal view; 34, lateral habitus.

FIGURES35–40.35–36, Rosalba stenodesma sp. nov., paratype male:35, dorsal habitus; 36, ventral habitus.37–40, Rosalba seraisorum sp. nov., holotype female: 37, head, frontal view; 38, dorsal habitus; 39, ventral habitus; 40, lateral habitus.

FIGURES90–96. Dorsalhabitus:90, Rosalbasenecauxi sp.nov., holotype male; 91, Rosalba clinei sp.nov., paratype female; 92, R. stenodesma, holotype male. 93–96, R. dalensi, holotypemale: 93, dorsal habitus; 94, ventral habitus; 95, lateral habitus; 96, head, frontal view.