Rosalba strandiella ( Breuning, 1940 )

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 : 233-234

Rosalba strandiella ( Breuning, 1940)

( Figs. 41–44 )

Redescription. Female.Integument black, dark brown on some areas; gula mostly reddish brown; mouthparts reddish brown; scape dark brown; antennomeres reddish brown; tarsi dark reddish brown, black on apex of tarsomere V and claws.

Head. Frons finely, moderately abundantly punctate; with yellow pubescence, partially obscuring integument, denser on narrow area close to eyes, interspersed with some long, erect, brown setae. Area between antennal tubercles and upper eye lobes with sculpture, pubescence and dark setae as on frons. Remaining surface of vertex finely, abundantly punctate; with minute yellowish setae, distinctly not obscuring integument. Antennal tubercles minutely, abundantly punctate; with yellow pubescence not obscuring integument, distinctly denser close to lower eye lobes. Area behind upper eye lobes finely, abundantly punctate; with yellow, dense pubescence close to eye, shorter, slightly conspicuous toward prothoracic margin; with long, erect, sparse, brown setae close to eye. Area behind lower eye lobes with dense, yellow pubescence obscuring integument; with some long, erect, dark brown setae near eye. Submentum smooth, with short, decumbent, sparse yellowish setae. Postclypeus with yellowish pubescence on large central area, partially obscuring integument, glabrous laterally; with long, erect, brown setae close to glabrous area. Labrum convex and coplanar with anteclypeus on basal half, inclined on distal half; pubescence slightly conspicuous on basal half, distinctly longer, more abundant on distal half. Distance between upper eye lobes 0.10 times length of scape; in frontal view, distance between lower eye lobes 0.55 times length of scape. Antennae 1.85 times elytral length, reaching elytral apex at basal third of antennomere VIII; ventral side of scape, pedicel and antennomeres III–X with long, erect, dark setae, gradually sparser toward antennomere X; antennal formula (ratio) based on antennomere III: scape = 0.89; pedicel = 0.16; IV = 1.13; V = 1.03; VI = 0.92; VII = 0.84; VIII = 0.74; IX = 0.67; X = 0.65; XI = 0.73.

Thorax. Prothorax 1.15 times wider than long; sides with small protuberance about middle. Pronotum coarsely, abundantly punctate except on narrow, smooth, transverse band close to basal and distal margin; with three wide, longitudinal bands with dense, yellow pubescence obscuring integument (one centrally, widened at base; one on each side); remaining surface with yellowish white, short, decumbent pubescence, distinctly not obscuring integument. Sides of prothorax with sculpture as on pronotum; with wide longitudinal band with dense, yellow pubescence obscuring integument, placed at about middle, anteriorly and posteriorly fused with that on sides of pronotum by transverse band with same pubescence; remaining surface with yellowish white, short, decumbent pubescence, distinctly not obscuring integument. Prosternum minutely, densely punctate, laterally interspersed with fine punctures; with moderately dense band with yellow pubescence laterally, distinctly shorter, less conspicuous, yellowish white centrally. Prosternal process coarsely, abundantly punctate; with yellowish white pubescence not obscuring integument, distally interspersed with long, moderately abundant setae. Mesoventrite microsculptured, notably transversely depressed close to apex of prosternal process; laterally with decumbent, abundant yellowish white setae partially obscuring integument, with slightly conspicuous, sub-erect, yellowish white setae on depressed region. Mesanepisternum with dense, yellow pubescence obscuring integument, except superior inner side with whitish pubescence distinctly not obscuring integument. Mesepimeron with whitish pubescence not obscuring integument on half closer to elytra, with yellow pubescence obscuring integument on remaining surface. Metanepisternum with whitish pubescence not obscuring integument. Inclined side of metaventrite with dense, longitudinal band with yellow pubescence close to metanepisternum, another near flat area of metaventrite, fused with the former at apex; remaining surface with whitish pubescence partially obscuring integument. Scutellum with dense, yellow pubescence. Elytra. Coarsely, abundantly punctate on basal half, gradually finer, sparser toward apex. With dense, yellow pubescence as follows: wide, longitudinal band on basal third of vertical region, not reaching epipleura; wide, longitudinal band on central third of vertical region, not reaching epipleura; longitudinal band from base to near distal third, placed close to elytral curvature, fused with the following innermost band on base; two longitudinal, slightly oblique band, fused at end of basal quarter by large macula (innermost almost absent basally, fused with distal macula; outermost distinct from base to near middle); longitudinal sutural band on basal fifth; diamond macula placed centrally, slightly before distal third; moderately narrow band close to epipleura on vertical distal third, partially fused with center-lateral band, fused at apex with discal bands of distal third; wide V-shaped macula on distal third, partially fused with diamond macula and innermost band of anterior 2/3; longitudinal band on distal third close to lateral curvature of elytra, fused at apex with the former. With narrow, longitudinal bands with slightly dense, white pubescence among yellow longitudinal bands; remaining surface with yellowish brown, slightly conspicuous pubescence. With sparse, erect, brown setae on distal quarter. Elytral apex slightly obliquely truncate, with outer angle distinctly spiny and sutural angle rounded. Legs. Femora with longitudinal bands of yellow pubescence; remaining surface if whitish pubescence not obscuring integument. Metatarsomere I as long as 0.7 times II–III together; metatarsomere V (without claws) as long as 0.95 times I–III together.

Abdomen. Ventrites I–III with lateral macula with yellow pubescence on distal half; ventrite IV with lateral macula with dense, yellow pubescence on distal half, sparser on basal half; ventrite V with lateral band with yellow pubescence; remaining surface of ventrites with whitish pubescence, partially obscuring integument.

Dimensions in mm (female).Total length, 9.50/10.85; prothorax: length, 1.60/1.80; anterior width, 1.70/2.00; posterior width, 1.80/2.05; widest prothoracic width, 1.80/2.15; humeral width, 2.65/2.95; elytral length, 6.85/7.85.

Material examined. BOLIVIA, Santa Cruz: Florida (4 km N Bermejo; Refugio los Volcanes ; 1000-1200 m; 18°06’S / 63°36’W), 1 female, 05.XII.2013, Skillman & Wappes col. ( MNKM). BRAZIL, GΟiás: Perolândia, 1 female, XII.1972, F. M. Oliveira col. ( MZSP)

Remarks. Breuning (1940) described RΟsalba strandiella based on two specimens (sex not informed) from Brazil. According to him, the holotype is from the Brazilian state of Goiás (Jataí) and is deposited at MNHN. He did not report where the paratype was collected, as well as where it is deposited. However, according to Breuning (1971) (translated): “Described by me based on two specimens from Brazil: state of Goiás, Jatahy [= Jataí] and Mineira [probably Mineiros] (Museum of Paris).” Bezark (2013) recorded the species for the Brazilian state of Rondônia. The species is now recorded for Bolivia (new country record).

The middle band of yellow pubescence on distal third of elytra is variable, from distinctly narrow to nearly diamond-shaped, and from isolated to fused with outermost and innermost. The yellow pubescence can be paler.

Figures

FIGURES 41–48. 41–44, Rosalba strandiella, female: 41, dorsal habitus; 42, ventral habitus; 43, lateral habitus; 44, head, frontal view.45–48, Rosalba rufescens: 45, male, ventral habitus; 46, female, head, frontal view; 47, dorsal habitus; 48, lateral habitus.