Rosalba pittieri Joly, 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 : 229-230

Rosalba pittieri Joly , sp. nov.

( Figs 121–124 )

Description. Male (?). Integument mostly brown to dark brown; labrum, ventral side of scape, antennomeres II– IV, and legs reddish brown; mouthparts light yellowish brown.

Head. Frons finely, sparsely punctate; with yellowish white pubescence partially 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, more orange toward upper eye lobes, not obscuring integument; with long, erect, sparse dark brown setae. Area between upper eye lobes with yellowish pubescence obscuring integument, connected to narrow band also with yellowish 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 eye Median longitudinal groove not carinate on vertex. Area behind lower eye lobes with yellowish pubescence partially obscuring integument, without erect 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 yellowish pubescence, primarily on emarginate area of eyes. Submentum narrow, depressed close to gula, elevated toward mentum; with short, decumbent, moderately sparse yellowish white setae on depressed area, with a few long, erect, dark brown setae on elevate area. 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. Distance between upper eye lobes 0.09 times length of scape; in frontal view, distance between lower eye lobes 0.64 times length of scape. Missing left antenna and antennomeres V–XI at right antennae; antennomeres with decumbent, yellowish pubescence not obscuring integument; dorsal surface of scape without dark brown setae; antennomeres III–IV without short, erect yellowish setae throughout; ventral surface of scape, pedicel and antennomeres III–IV with long, erect dark brown setae; antennomere IV feebly arcuate in lateral view; antennal formula (ratio) based on antennomere III: scape = 1.25; pedicel = 0.31; IV = 1.47.

Thorax. Prothorax 1.18 times wider than long; sides rounded, constricted on basal third, without distinct lateral tubercle. Pronotum finely, abundantly punctate; with moderately narrow, longitudinal band of yellowish pubescence centrally (sparser anteriorly); on each side with longitudinal band of yellowish pubescence; remaining surface with very short and sparse yellowish setae. Sides of prothorax finely, moderately abundantly punctate (punctures slightly stronger than on pronotum); with wide longitudinal band of yellowish pubescence at about middle, basally projected toward procoxal cavity; 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 minutely punctate; with yellowish white pubescence not obscuring integument. Mesoventrite notably transversely depressed close to apex of prosternal process; with slightly conspicuous yellowish pubescence on depressed area, more conspicuous laterally. Mesanepisternum with yellowish pubescence. Mesepimeron with yellowish pubescence obscuring integument. Metanepisternum with dense yellowish pubescence. Metaventrite with slightly conspicuous longitudinal band of yellowish pubescence close to lateral curvature; remaining surface with yellowish pubescence partially obscuring integument, mainly on central area and behind mesocoxae. Scutellum with yellowish pubescence obscuring integument. Elytra. Moderately coarsely, abundantly punctate on basal half, gradually finer, sparer toward apex; with four longitudinal bands of yellowish pubescence starting on base and finishing at about midlength of elytron, diffuse on its posterior half; first (sutural) shorter, fourth longest, denser and wider; two irregular flexuous bands, one behind middle and another at apex; with three oblong brown bands between basal yellowish bands, three similar brown bands (longer than basal ones) on middle of elytron, and three preapical, elongate, oblong brown bands (the central longest); apex slightly rounded, with outer angle not projected. Legs. Femora with yellowish pubescence partially obscuring integument, except on base. Metatarsomere I as long as 0.45 times I–III together; metatarsomere V (without claws) as long as 0.66 times I–III together.

Abdomen. Ventrites more or less uniformly covered by pubescence, denser on IV and V; distal third of ventrite V with long, nearly erect dark brown setae; apex of ventrite V truncate.

Dimensions in mm (holotype male?). Total length, 5.15; prothorax: length, 1.00; anterior width, 1.06; posterior width, 1.10; widest prothoracic width, 1.18; smaller prothoracic width, 1.06; humeral width, 1.66; elytral length, 3.72.

Type material. Holotype male from VENEZUELA, Aragua: Rancho Grande , 1500 m, 2.VI.1967, J. & B. Bechyne col. ( MIZA).

Etymology. This species is named after Henri François Pittier, Swiss naturalist and botanist who immigrated to Costa Rica and finally to Venezuela.

Remarks. RΟsalba pittieri sp. nov. is similar to R. tanimbuca Galileo & Martins, 2013 , by the elytral pattern and shape of prothorax, but differs as follows: prothorax with three longitudinal bands of pubescence; elytral bands of yellowish pubescence best defined, especially at base of elytron; apex of elytra rounded. In R. tanimbuca the pubescence covers completely the pronotum, the elytral bands of yellowish pubescence are more diffuse, and the apex of the elytra is truncate.

Figures

FIGURES 121–128. 121–124, R. pittieri, holotype male: 121, dorsal habitus. 122, ventral habitus; 123, lateral habitus; 124, head, frontalview.125–128, R.gaianii, holotype female:125, head,frontalview;126, dorsal habitus; 127, ventral habitus; 128, lateral habitus.