Rosalba seraisorum Tavakilian, 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 : 218-219

Rosalba seraisorum Tavakilian, Santos-Silva & Galileo , sp. nov.

( Figs. 37–40 )

Description. Female. Integument black; mouthparts dark reddish brown, with apex of palpomeres yellowish; base of antennomeres III–XI reddish, this area covering half on antennomere III, gradually shorter toward XI; dark area of antennomeres III–XI gradually lighter toward distal segments; apex of abdominal ventrites I–IV with narrow, transverse yellowish band; abdominal ventrite V gradually brownish toward apex.

Head. Frons minutely, densely punctate interspersed with fine, moderately abundant punctures; with pale yellow pubescence partially obscuring integument, mainly close to eyes; with one long, erect dark brown setae on each side close to eyes. Area between antennal tubercles finely, abundantly punctate except smooth central area close to upper eye lobes; pubescence as on frons; with long, erect, sparse dark brown setae close to eyes. Area between upper eye lobes with pale yellow pubescence obscuring integument, connected to narrow band also with pale yellow pubescence behind and close to upper eye lobes. Remaining surface of vertex and area behind upper eye lobes finely, moderately abundantly punctate; with pale yellow pubescence denser along median longitudinal groove and wide band behind eyes; with some long, erect dark brown setae close to eyes. Median longitudinal groove carinate on vertex. Area behind lower eye lobes finely, moderately sparsely punctate, mainly toward ventral side of head; with pale yellow pubescence partially obscuring integument, interspersed on tumid area close to eyes with long, erect, sparse dark brown setae. Antennal tubercles minutely, abundantly punctate; with pale yellow pubescence obscuring integument on some areas. Area between antennal socket and eyes with pale yellow pubescence partially obscuring integument. Submentum narrow, depressed close to gula, elevated toward mentum; with short, decumbent, moderately sparse pale yellow pubescence. Postclypeus minutely, densely punctate on wide central area, smooth laterally; with pubescence as on frons on punctate area, glabrous on smooth area; with long, erect, sparse dark brown setae on punctate area. Labrum convex and coplanar with anteclypeus on basal half, inclined on distal half; with slightly conspicuous whitish pubescence on apex of basal half, interspersed with long, erect, sparse dark brown and yellowish setae; with yellowish pubescence on distal half, denser distally. 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 2.0 times elytral length, reaching elytral apex near midlength of antennomere VIII; scape with yellowish pubescence not obscuring integument; reddish area of antennomeres III–XI with yellowish pubescence and remaining surface with yellowish brown, slightly conspicuous pubescence; scape, pedicel and ventral side of antennomeres III–X with long, erect dark brown setae, gradually shorter, sparser toward X; antennomeres III–XI with short, erect, sparse yellowish setae throughout; antennal formula (ratio) based on antennomere III: scape = 0.96; pedicel = 0.20; IV = 1.26; V = 1.16; VI = 1.10; VII = 1.04; VIII = 0.86; IX = 0.82; X = 0.78; XI = 0.76.

Thorax. Prothorax 1.1 times wider than long; sides slightly widened centrally, with small, blunt tubercle on midlength. Pronotum with three gibbosities centrally arranged in a triangle (basal most centrally); basal quarter transversely, widely sulcate (centrally slightly deeper); surface coarsely, abundantly punctate; with wide band of dense pale yellow pubescence on each side; remaining surface with sparse pale yellowish pubescence, slightly denser centrally on distal third. Sides of prothorax moderately coarsely, abundantly punctate (punctures finer than on pronotum); with wide band of dense yellow pubescence covering inferior half, with pale yellow pubescence between this band and pronotum, not obscuring integument; with some long, erect dark brown setae. Prosternum with yellowish pubescence not obscuring integument. Prosternal process minutely, densely punctate, interspersed with coarse punctures, mainly on basal third and distal area; with yellowish pubescence not obscuring integument. Mesoventrite with slightly conspicuous yellowish pubescence on depressed area, denser, pale yellow laterally. Mesanepisternum, mesepimeron and metanepisternum with pale yellow pubescence obscuring integument. Metaventrite with yellowish pubescence, denser laterally. Scutellum with pale yellow pubescence not obscuring integument. Elytra. Coarsely, abundantly punctate on basal half, finer, sparser on beginning of distal half, nearly smooth toward apex. Pubescence forming complex drawing as follows: wide, longitudinal pale yellow band on basal quarter of vertical region; wide, longitudinal pale yellow band on lateral basal fifth of dorsal surface, narrowed toward its apex; wide, longitudinal, sinuous pale yellow band from base to at about apex of basal third; narrow pale yellow band on basal fifth, between sinuous band and suture, starting after apex of scutellum; oblique band starting at level of apex of sinuous band, following to near suture, then becoming fragmented, parallel to suture reaching distal macula; oblique, somewhat fragmented pale yellow band (interspersed with grayish pubescence) starting laterally at about middle connected, becoming longitudinal on center of dorsal surface (on apex of this longitudinal area, starts another oblique, fragmented pale yellow band connected to that close to suture); distal fifth nearly covered with pale yellow pubescence except for irregular, central area with yellowish brown pubescence exposing integument (this area widened on center of dorsal surface); with longitudinal grayish pubescence between basal longitudinal pale yellow bands and along basal half of suture; moderately large circular spot with grayish pubescence on center of discal surface (near midlength); with small, irregular spots of pale yellow and grayish pubescence between apex of basal third and distal area covered with pale yellow pubescence. Elytral apex obliquely truncated, with outer angle triangularly projected. Legs. Femora with pale yellow pubescence not obscuring integument. Metatarsomere I as long as 0.65 times II–III together; metatarsomere V (without claws) 1.2 times as long as I–III together.

Abdomen. Ventrites I–IV laterally with wide band of pale yellow pubescence, forming continuous longitudinal band; on each side of central area with narrow band of pale yellow pubescence (less distinct on IV) forming continuous longitudinal band; remaining surface with pale yellow pubescence exposing integument, gradually denser from I to IV (slightly denser centrally). Ventrite V with moderately dense pale yellow pubescence. Distal third of ventrites III–V with long, erect dark brown setae (distinctly more abundant on V). Distal margin of ventrite V slightly concave.

Dimensions in mm (holotype female/ paratype male/ paratype females). Total length, 8.40/10.45/8.10–9.20; prothorax: length, 1.60/2.00/1.60–1.70; anterior width, 1.55/2.00/1.50–1.70; posterior width, 1.65/1.95/1.60–1.80; widest prothoracic width, 1.80/2.15/1.70–1.90; humeral width, 2.20/2.80/2.20–2.50; elytral length, 5.90/7.30/5.60– 6.45.

Type material. Holotype female from BRAZIL, AmazΟnas: Tabatinga , XI.1977, B. Silva col. ( MZSP) . Paratypes—ECUADOR, SucumbíΟs: Rio Napo-Rio Aguarico (76°-77°W), 1 female, IX-X.1977, Peña col. ( MZSP) ; Shushufindi , 1 female, 5.II.2004, F. T. Hovore col. ( CASC) . BRAZIL, AmazΟnas: 1 female, same data as holotype ( MNRJ) . FRENCH GUIANA: Piste de Kaw (pk 45; light trapping), 1 female, 30.VIII.1986, Fanny & Jean-Pierre Serais col. [ex collection IRD#994]( MNHN) ; Piste du plateau des Mines (pk 1.3; light trapping), 1 male, 11.XII.1993, Annie Docquin & Lionel Sénécaux col. [ex collection IRD#994] ( MNHN) ; Piste Coralie (pk 11; light trapping), 1 male, 14.XII.1991, Marc Thouvenot col. [ex collection IRD#994] ( MNHN) ; Piste Changement (pk 6; light trapping), 1 male, 05.IX.1991, Annie Docquin & Lionel Sénécaux col. [ex collection IRD#994] ( MNHN) ; 1 female, RN2 pk 82 (tronçon 1, pk 15 [meaning that at the km 82 of the RN2 road, starts a trail and the collecting was made at the km 15 of this trail], light trapping), 05.VIII.2000, Jean-Louis Giuglaris col.(JLGC).

Etymology. The new species is named in honor of Fanny & Jean-Pierre Serais, great contributors to the knowledge of Guianese longhorned beetles.

Remarks. RΟsalba seraisΟrum sp. nov. is similar to R. fΟrmΟsa Martins & Galileo, 2008, but differs as follows: pronotum without distinct central band of yellow pubescence; different elytral drawing ( Fig. 37 ); elytra gradually narrowed toward apex after midlength. In R. fΟrmΟsa, the pronotum has central band of yellow pubescence, the elytral drawing is different ( Fig. 62 ), and the elytra is more abruptly narrowed toward apex on distal quarter. It is also similar to R. incrustabilis Galileo & Martins, 2006 but differs by the slender body, longer antennae (female), and different elytral drawing. In R. incrustabilis the body is wider, the antennae are shorter (female), and the elytral drawing is different ( Fig. 65 ).

Figures

FIGURES35–40.35–36, Rosalba stenodesma sp. nov., paratype male:35, dorsal habitus; 36, ventral habitus.37–40, Rosalba seraisorum sp. nov., holotype female: 37, head, frontal view; 38, dorsal habitus; 39, ventral habitus; 40, lateral 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.

FIGURES 64–76. Dorsal habitus: 64, Rosalba gounellei, holotype; 65, R. incrustabilis, paratype; 66, R. indistincta, holotype; 67, R. jolyi, holotype; 68, R. inscripta, syntype; 69, R. maculosa, holotype; 70, R. malleri, holotype; 71, R. mediofasciata, holotype; 72, R. obliqua, syntype; 73, R. pulchella, holotype; 74, R. parva, holotype; 75, R. peraffinis, holotype; 76, R. mediovittata, holotype.Figures 66, 71, 72 and 75 by Jesus Santiago Moure; 73 by Gérard L.Tavakilian (MNHN).