Rosalba birai 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 : 215-216

Rosalba birai Santos-Silva & Galileo , sp. nov.

( Figs. 29–32 )

Rosalba rufobasalis ; Martins & Galileo, 1999: 71 (misidentification).

Description. Male. Integument dark brown; mouthparts dark reddish brown; labrum gradually reddish brown toward apex.

Head. Frons finely, moderately sparsely punctate; with yellowish white pubescence not obscuring integument, yellow close to eyes and toward antennal tubercles, except glabrous, narrow band along median longitudinal groove; with some long, erect, dark brown setae close to eyes. Area between antennal tubercles finely, sparsely punctate; with yellow pubescence not obscuring integument except glabrous area along median longitudinal groove. 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 yellowish pubescence. Median longitudinal groove carinate on vertex. Area behind lower eye lobes with yellow pubescence partially obscuring integument. Antennal tubercles projected at apex; with yellow pubescence not obscuring integument. Area between antennal socket and eyes with narrow, dense band of yellow pubescence. 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 dark brown setae directed forward. Labrum convex and coplanar with anteclypeus on basal half, inclined on distal half; finely, sparsely punctate on coplanar area; with slightly conspicuous yellowish pubescence interspersed with long, erect, moderately abundant yellowish and dark brown setae on coplanar area; with transverse, dense band of yellow pubescence close to apex. Distance between upper eye lobes 0.02 times length of scape (almost contiguous); in frontal view, distance between lower eye lobes 0.35 times length of scape. Antennae 2.2 times elytral length, reaching elytral apex at distal third 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–IX with long, erect dark brown setae (longer, more abundant on basal segments, gradually shorter, sparser toward IX); antennal formula (ratio) based on antennomere III: scape = 0.90; pedicel = 0.13; IV = 1.25; V = 1.15; VI = 1.10; VII = 1.04; VIII = 1.01; IX = 0.95; X = 0.92; XI = 1.10.

Thorax. Prothorax 1.3 times wider than long; sides slightly convergent from base to apex, with small, blunt tubercle at midlength. Pronotum with surface somewhat irregular, coarsely, moderately abundantly punctate; with three narrow, longitudinal, dense bands of yellow pubescence; remaining surface with slightly conspicuous yellowish pubescence. Sides of prothorax coarsely, sparsely punctate; with wide band of yellow pubescence placed after middle; remaining surface with yellowish pubescence not obscuring integument; with some long, erect dark brown setae. Prosternum microsculptured centrally, smooth laterally; with yellowish white pubescence not obscuring integument. Prosternal process slightly wider than half of width of procoxal cavity, coarsely, densely punctate; with yellowish white pubescence not obscuring integument. Mesoventrite notably transversely depressed close to apex of prosternal process; with slightly conspicuous yellowish white pubescence on depressed area, more conspicuous laterally. Mesanepisternum with yellow pubescence except yellowish white pubescence on semicircular central area close to mesoventrite. Mesepimeron with yellowish pubescence. Metanepisternum with yellow pubescence obscuring integument.Metaventritewith wide band of yellow pubescence on inclined area, with yellowish white pubescence between yellow band and metanepisternum and on remaining surface. Scutellum with wide, longitudinal band of yellow pubescence centrally, with yellowish pubescence not obscuring integument laterally. Elytra. Coarsely, moderately abundantly punctate on basal half, gradually finer, sparser toward apex; with 4 narrow, longitudinal bands of yellow pubescence starting on base, innermost and third fused near apex, second ending at base of distal seventh; with another narrow band of yellow pubescence close to suture on basal fifth, gradually narrowed, more white toward midlength; remaining surface with slightly conspicuous yellowish brown pubescence; apex truncate, with outer angle triangularly projected. Legs. Femora with band of yellow pubescence dorsally on basal 2/3; remaining surface with yellowish white pubescence not obscuring integument. Inner side of protarsomere V and outer side of meso- and metatarsomeres V with longitudinal band of yellow pubescence; metatarsomere I as long as 0.85 times II–III together; metatarsomere V (without claws) as long as 1.10 times I–III together.

Abdomen. Ventrites with wide band of yellow pubescence obscuring integument laterally; 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, centrally widely emarginate.

Dimensions in mm (holotype male).Total length, 9.95; prothorax: length, 1.55; anterior width, 1.60; posterior width, 2.00; humeral width, 2.85; elytral length, 7.50.

Type material. Holotype male from COLOMBIA, NariñΟ: La Planada, 1.III.1995, no collector indicated ( MZSP).

Etymology. The new species is named after the late Ubirajara Ribeiro Martins de Souza (Bira).

Remarks. According to Martins & Galileo (1999) (translated): “ RΟsalba rufΟbasalis Breuning, 1940 is known from Nariño: Gorgona Island (2°59’N, 78°12’W) ( Breuning 1940), a sea island ca. 25 km away from the coast; the species is characteristic for the elytral drawing formed by yellow, narrow longitudinal bands along entire surface. Our specimen differs from the redescription ( Breuning 1971) by the larger dimensions; by the scutellum covered only centrally of yellowish pubescence; by the elytral integument with a single color and by the yellowish bands of the elytra much narrower. The slide of the holotype of R. rufΟbasalis, took by J. S. Moure in the BMNH, shows that the scutellum is entirely covered by yellowish pubescence, the integument of the basal half of the elytra is reddish, and covered by yellowish pubescence, and brownish and covered by dark brown pubescence on distal half, and the elytral bands are wider. Furthermore, the dimensions are smaller: length 7 mm, width, 1.6 mm.”

Actually, R. birai differs from R. rufΟbasalis for the features pointed out by Martins & Galileo (1999), but also as follows: prothorax distinct narrowed from base to apex; the upper eye lobes are closer (practically contiguous); the prothorax has 4.5 times elytral length; the femora are slender. In R. rufΟbasalis, the prothorax has with similar width on base and apex and the sides are distinctly more parallel, the upper eye lobes are more separated, the prothorax has 3.5 times elytral length, and the femora are thicker.

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.