Rosalba similis Joly, 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 : 221-222

Rosalba similis Joly, Santos-Silva & Galileo , sp. nov.

( Figs 105–108 , 117–120 )

Description. Female. Integument mostly brown to dark brown; mouthparts light yellowish brown; antennae beginning on pedicel, reddish-brown; elytra brown, lighter toward apex, yellowish on areas covered by light pubescence.

Head. Frons not evidently punctate; with yellowish pubescence not obscuring integument, denser close to eyes; with a few long, erect, sparse dark brown setae close to the eyes. Area between antennal tubercles with yellowish pubescence toward frons, orange 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, not covered by pubescence on its posterior half. 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, yellower toward upper eye lobes, not obscuring integument. Area between antennal socket and eyes with narrow, dense band of yellow pubescence, primarily on emarginate area of eyes. Submentum narrow, depressed close to gula, elevated toward mentum. Postclypeus with yellowish white pubescence partially not obscuring integument; 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, equivalent to one ommatidial diameter (almost contiguous); distance between lower eye lobes in frontal view 0.52 times length of scape. Antennae 2.14 times elytral length, reaching elytral apex at apical half of antennomere VIII; with decumbent, yellowish pubescence not obscuring integument; dorsal surface of scape with few long, erect, sparse dark brown setae; antennomeres III–XI without erect, yellowish setae; 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 = 1.08; pedicel = 0.2; IV = 1.26; V = 1.18; VI = 1.13; VII = 1.05; VIII = 1.00; IX = 0.95; X = 0.90; XI = 0.98.

Thorax. Prothorax 1.14 times wider than long; sides sub-parallel with blunt, distinct tubercle at about midlength. Pronotum coarsely, abundantly punctate; with moderately wide, longitudinal band of yellow pubescence centrally; on each side with longitudinal band of yellow pubescence; remaining surface with very short and sparse yellowish setae. Sides of prothorax coarsely, moderately abundantly punctate (punctures finer, sparser than on pronotum); with wide longitudinal band of yellow pubescence at about middle; remaining surface with yellowish white pubescence not obscuring integument. 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 similar to that of dorsal side of mesanepisternum. Metanepisternum with yellow pubescence not obscuring integument. Metaventrite with slightly conspicuous longitudinal band of yellow pubescence close to lateral curvature (pubescence distinctly more yellow than on metanepisternum); remaining surface with yellowish white pubescence partially obscuring integument, mainly on central area. Scutellum with yellow pubescence. Elytra. Coarsely, abundantly punctate on basal half of basal tumescence, then considerably finer on basal half of disk, gradually finer, sparser toward apex (nearly smooth on distal quarter); with 4 longitudinal relatively wide bands of yellow pubescence, the first (innermost) beginning in the middle of basal tumescence, getting gradually closer to suture, narrowed about middle up to beginning of apical fifth, then wider again to apex, in the middle of narrow area with short, transversal spot; second band beginning at base of elytra, shortly interrupted at level of middle of basal tumescence and again interrupted at middle of elytron, starting again at internal side of transversal spot, and then fused with the first; the third, humeral, continuous from base to apex of elytron, narrowed more or less at same level of the first band; and fourth, subhumeral from base to apex of elytron, interrupted slightly before middle, starting again at external side of second small, transversal spot; external spot placed closer to base than the internal. Areas between longitudinal bands at basal half and close to apex of elytron covered with yellowish to white pubescence; apex slightly obliquely truncate, with outer angle triangularly projected. Legs. Femora brown with dorsal border yellowish; with yellowish white pubescence not obscuring integument. Metatarsomere I as long as 0.4 times I–III together; metatarsomere V (without claws) as long as 0.9 times I–III together.

Abdomen. Ventrites with yellow pubescence, more concentrated on sides, but not forming distinct longitudinal band; distal third of ventrite V with long, nearly erect dark brown setae; apex of ventrite V truncate.

Male. Antennae longer (2.1 times elytral length), reaching elytral apex at distal fifth of antennomere VII.

Dimensions in mm (holotype female/ paratype male). Total length, 8.66/8.80; prothorax: length, 1.48/1.60; anterior width, 1.60/1.60; posterior width, 1.60/1.60; widest prothoracic width, 1.68/1.75; humeral width, 2.44/ 2.45; elytral length, 6.13/6.25.

Type material. Holotype female from PERU, HuanucΟ: Tingo Maria ( Castillo ; 700 m), 26.VI.1974, Bordon col. ( MIZA). Paratype male from ECUADOR, Orellana: Shushufindi, 5.II.2004, F. T. Hovore col. ( CASC).

Etymology. Latin, “ similis ” (similar), allusive to the similarity of the new species with R. inscripta .

Remarks. RΟsalba similis sp. nov. is similar to R. inscripta ( Bates, 1866) , but differs by the prothorax constricted at basal half, the longitudinal band of yellow pubescence close to elytral curvature entire from base to near apex, and the presence of two small transversal spots behind middle of elytron. In R. inscripta , the basal half of the prothorax is not constricted, the longitudinal band of yellow pubescence close to elytral curvature is interrupted at about midlength and the distal area is surrounded by band with whitish pubescence, and only one transversal spot about midlength. RΟsalba similis is also similar to R. fimbriata in the disposition of the transversal spots of the elytra, but in the latter the basal half of the prothorax is not constricted.

Figures

FIGURES 105–112. 105–108, R. similis, paratype male: 105, dorsal habitus; 106, ventral habitus; 107, lateral habitus; 108, head, frontalview.109–112, R.bezarki, holotype female;109, head, frontalview; 110, dorsal habitus; 111, ventral habitus; 112, lateral habitus.

FIGURES113–120.113–116, R.schneppi, paratype female:113, dorsal habitus.114, ventral habitus; 115, lateral habitus; 116, head, frontal view.117–120, R.similis, holotype female:117, head, frontal view; 118, dorsal habitus; 119, ventral habitus; 120, lateral habitus.