Rosalba cerdai Tavakilian, 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 : 232-233

Rosalba cerdai Tavakilian , sp. nov.

( Figs 129–131 )

Description. Male. Integument mostly black; palpi brown, with apex of palpomeres yellowish brown; basal half of meso- and metatibiae dark reddish brown.

Head. Frons minutely, densely punctate, interspersed with moderately finely, abundant punctures; with light yellowish brown pubescence nearly obscuring integument, interspersed with a few long, erect dark setae close to lower eye lobes. Area between antennal tubercles with sculpturing and pubescence as on frons, but smooth and glabrous along median groove. Area between upper eye lobes and prothorax and area behind eyes with light yellowish brown pubescence obscuring integument; with a few long, erect dark setae close to eyes. Antennal tubercles with sculpturing and pubescence as on frons; with a few long, erect dark setae. Area between antennal socket and eyes with light yellowish brown pubescence obscuring integument. Genae with dense light yellowish brown pubescence toward ventral side, gradually pale yellow, sparser toward dorsal side, except glabrous distal area; with a few long, erect dark setae. Postclypeus with pubescence as on frons interspersed with long, erect, sparse dark setae. Labrum convex and coplanar with anteclypeus on basal half, inclined on distal half; densely, minutely rugose-punctate on coplanar area; with sparse yellowish brown pubescence on coplanar area, interspersed with long and short setae directed forward distally; with yellowish brown pubescence on inclined area, slightly more abundant than on coplanar area. Distance between upper eye lobes 0.09 times length of scape; in frontal view, distance between lower eye lobes 0.53 times length of scape. Antennae 2.0 times elytral length, reaching elytral apex at basal area of antennomere VIII; scape with yellowish brown pubescence no obscuring integument dorsally, more yellowish, partially obscuring integument ventrally, interspersed with long, erect, sparse dark setae; antennomeres III–X with long, erect setae ventrally, gradually shorter and sparser toward X; antennal formula (ratio) based on antennomere III: scape = 1.08; pedicel = 0.18; IV = 1.20; V = 1.12; VI = 1.00; VII = 1.00; VIII = 0.90; IX = 0.90; X = 0.81; XI = 0.86.

Thorax. Prothorax slightly wider than long (1.1 times); sides with without tubercle. Pronotum coarsely, abundantly punctate, except nearly smooth distal area; with three longitudinal, wide light yellowish brown pubescent bands, one at each side, another narrowest centrally; remaining surface with yellowish brown pubescence not obscuring integument; with a few long, erect dark setae. Sides of prothorax coarsely, densely punctate; with wide longitudinal band with dense light yellowish brown pubescence obscuring integument, placed after middle; remaining surface with whitish pubescence partially obscuring integument; with a few long, erect dark setae. Prosternum and mesoventrite finely, abundantly punctate; with yellowish white pubescence not obscuring integument, denser laterally. Mesanepisternum with yellowish white pubescence toward mesoventrite, with yellow pubescence toward elytra. Metanepisternum with yellow pubescence obscuring integument. Metaventrite with narrow band with yellow pubescence close to metanepisternum, yellowish white, partially obscuring integument on remaining surface. Scutellum with light yellowish brown pubescence obscuring integument. Elytra. Coarsely, moderately abundantly punctate on basal half, smooth on distal half; apex slightly sinuous, with acute projection at outer angle. With dense light yellowish brown pubescence as follows; one on vertical area close to epipleura, from base to distal third; one dorsally close to lateral curvature, from base to distal third, gradually narrowed toward its apex; one at about center of dorsal area, from base to middle; one dorsally near suture, from apex of basal sixth to about distal base of distal third, gradually narrowed toward its apex; one transverse on base, joining two outermost dorsal bands, reaching scutellum; one wide, slightly transverse, irregular, placed at about base of distal third, joining longitudinal bands of basal 2/3, except band central band; one narrow close to epipleura, from transverse band to apex; one narrow on lateral curvature, from apex to near transverse band; one close to suture, distinctly widened toward apex, Y-shaped, fused distally with the two distal outermost. Basal half with whitish pubescence between longitudinal light yellowish brown bands, partially obscuring integument, except sub-reniform area on basal sixth close to scutellum with minute yellowish brown pubescence exposing integument. Remaining surface with minute yellowish brown pubescence exposing integument. Legs. Femora with light yellowish brown pubescence partially obscuring integument. Tibiae with light yellowish brown pubescence partially obscuring integument on basal 2/3, blackish on distal third (this latter longer laterally in meso- and metatibiae). Metatarsomere I as long as 0.75 times II–III together; metatarsomere V (without claws) as long as I–III together.

Abdomen. Ventrites with yellow pubescent band laterally, yellowish white pubescence, partially obscuring integument on remaining surface; apex of ventrite V truncate.

Dimensions in mm. Total length, 8.15; prothorax: length, 1.55; anterior width, 1.50; posterior width, 1.45; widest prothoracic width, 1.65; humeral width, 2.35; elytral length, 5.95.

Type material. Holotype male from FRENCH GUIANA: Route de Kaw (pk 39), 10.V.1996, Jean-Aimé Cerda col. [ex collection IRD#1323] ( MNHN).

Etymology. The new species is named in honor of Jean-Aimé Cerda, who collected many new species of Cerambycidae for the author of the new species.

Remarks. RΟsalba cerdai sp. nov. resembles R. hΟνΟrei Touroult, 2007, but differs as follows: body ( Fig. 129 ) slender; wide transverse pubescent band on elytra placed more distally, with posterior margin ending at about base of distal fifth. In R. hΟνΟrei ( Fig. 63 ) the body is wider, and the wide transverse pubescent band on elytra with posterior margin ending at about base of distal third. It differs from R. senecauxi sp. nov. ( Fig. 90 ), especially by the wide transverse band of pubescence on elytra unicolorous (bicolorous in R. senecauxi ).

Figures

FIGURES129–134.129–134.Rosalba cerdai, holotypemale:129, dorsal habitus; 130, lateral habitus, 131, head, frontalview. 132, R. monnei, holotype female, dorsal habitus. 133, R. genieri, holotype male, dorsal habitus. 134, R. peruviensis, holotype female, dorsal habitus.

FIGURES 49–63. Dorsal habitus: 49, Rosalba alboapicalis, holotype; 50, R. alcidionoides, holotype; 51, R. amazonica, holotype; 52, R. approximata, holotype; 53, R. arawakiana, holotype; 54, R. bucki, holotype; 55, R. cacapyra, holotype; 56, R. consobrina, holotype; 57, R. costaricensis, holotype; 58, R. crassepunctata, holotype; 59, R. digna, holotype; 60, R. dissimilis, syntype; 61, R. fimbriata, syntype; 62, R. formosa, holotype; 63, R. hovorei, holotype. Figures 49 and 58 by Jesus Santiago Moure; 53 and 63, from original description; 50, 60 and 61by Gérard L. Tavakilian (MNHN); 57 by Steven W.Lingafelter.

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.