Rosalba senecauxi 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 : 208-210

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

( Figs. 13–16 , 90 )

Description. Male. Integument black; mouthparts dark brown; parts of metacoxae, metatrochanteres and extreme base of metafemora reddish brown; apex of abdominal ventrite I dark reddish brown; elytra dark reddish brown as follows: oblique, irregular band from middle side (not reaching epipleura) to distal third of suture; transverse, irregular band near apex, from epipleura to suture; small area close to apex; distal half along suture.

Head. Frons minutely, moderately abundantly punctate, smooth along median longitudinal groove, with sparse, fine punctures near base of antennal tubercles; with yellowish pubescence not obscuring integument (slightly denser close to lower eye lobes), except glabrous, narrow, longitudinal area along median longitudinal groove; with some long, erect, dark brown setae near lower eye lobes. Area between antennal tubercles finely, sparsely punctate; with short, decumbent, yellowish pubescence not obscuring integument (shorter, sparser than on frons), glabrous along median longitudinal groove; with some long, erect, dark brown setae laterally. Area between upper eye lobes with yellow pubescence, obscuring integument (except glabrous area along median longitudinal groove), connected to narrow band also with yellow pubescence behind and close to upper eye lobes. Remaining surface of vertex finely, moderately abundantly punctate; with yellowish brown pubescence partially obscuring integument, except band with yellowish pubescence along median longitudinal groove (widened toward prothorax). Antennal tubercles very finely, abundantly punctate; with yellowish pubescence not obscuring integument. Area between antennal socket and eyes with yellow pubescence obscuring integument; with sparse, erect, long, dark brown setae. Tempora with yellow pubescence obscuring integument except glabrous, wide, oblique band behind lower eye lobe; with some long, erect, dark brown setae near eye.Area on each side of gula, finely, abundantly punctate. Submentum narrow, depressed, with short, yellowish white sparse setae interspersed with some long, erect, dark brown setae. Postclypeus with yellowish pubescence not obscuring integument, interspersed with long, dark brown setae directed forward. Labrum convex and coplanar with anteclypeus on basal half, inclined on distal half; with decumbent, yellowish pubescence interspersed with long, yellowish and dark brown setae directed forward, golden on distal margin. Distance between upper eye lobes 0.05 times length of scape; in frontal view, distance between lower eye lobes 0.45 times length of scape. Antennae 2.1 times elytral length, reaching elytral apex at basal fifth of antennomere VIII; scape with decumbent, sparse, yellowish pubescence; antennomeres with yellowish, sparse pubescence, more conspicuous on basal half of antennomere III, interspersed with short, erect, yellowish setae; ventral side of scape, pedicel and antennomeres III–X with long, erect, dark brown setae, gradually sparser toward antennomere X; antennal formula (ratio) based on antennomere III: scape = 1.07; pedicel = 0.18; IV = 1.34; V = 1.23; VI = 1.13; VII = 1.05; VIII = 1.02; IX = 0.92; X = 0.86; XI = 0.97.

Thorax. Prothorax slightly wider than long (1.1 times); sides with short, blunt tubercle about middle. Pronotum coarsely, moderately sparsely punctate (punctures coarser centrally), smooth near basal and distal margins; with three longitudinal, wide bands of pubescence, central sparser, with yellowish white pubescence, laterals with dense yellow pubescence; remaining surface with slightly conspicuous yellowish brown pubescence. Sides of prothorax moderately coarsely, sparsely punctate; with wide longitudinal band with dense, yellow pubescence obscuring integument, placed at about middle, distally fused with that on sides of pronotum by transverse, narrow band with same pubescence; remaining surface with short, decumbent, yellowish brown pubescence distinctly exposing integument; with some long, erect, dark brown setae. Prosternum finely, moderately abundantly punctate; with yellowish white pubescence not obscuring integument. Prosternal process moderately coarsely, abundantly punctate; with yellowish white pubescence not obscuring integument, distally more erect, interspersed with yellowish and brownish setae. Mesoventrite notably transversely depressed close to apex of prosternal process; laterally with yellowish pubescence obscuring integument; with slightly conspicuous, yellowish white pubescence on depressed area. Mesanepisternum with yellowish white pubescence toward mesoventrite, with yellow pubescence toward elytra.Mesepimeron with yellow pubescence. Metanepisternum with yellow pubescence obscuring integument, more whitish on superior side. Metaventrite with narrow band with yellowish pubescence close to metanepisternum, and another wider band with yellowish pubescence on inclined area, fused at apex with that close to metanepisternum; remaining surface with whitish pubescence. Scutellum with yellow pubescence partially obscuring integument. Elytra. Distinctly coarsely, moderately sparsely punctate on basal third, gradually sparser toward middle, almost impunctate on distal half. With dense pubescence as follows: with longitudinal yellow band on vertical area close to epipleura, from base to about middle, basally reaching dorsal surface and involving glabrous humerus, distally fused with oblique band;with longitudinal yellow band on dorsal surface of basal 2/5, distinctly narrow on basal fifth; with another longitudinal yellow band between the former and suture, starting at apex of basal sixth, distally fused with oblique band, narrowed after basal 2/5; with narrow white band close to suture, from scutellum to about middle; with sparse, white pubescence around longitudinal yellow bands of basal half; with three longitudinal bands fused centrally, longest laterally, shortest near suture, together forming oblique band (longest fused with apical macula by narrow longitudinal band); with transverse yellow band on distal fifth, interrupted on center of dorsal surface, partially fused with sparse yellow pubescence on apex. Remaining surface with yellowish brown pubescence distinctly not obscuring integument. Elytral apex slightly obliquely truncate, with outer angle slightly projected. Legs. Femora with yellowish white pubescence not obscuring integument, more conspicuous on base and ventral side. Metatarsomere I as long as 0.5 times II–III together; metatarsomere V (without claws) as long as 1.3 times I–III together.

Abdomen. Ventrites with yellowish white pubescence not obscuring integument; apex of ventrite V truncate.

Dimensions in mm (holotype male/ paratype males/ paratype female). Total length, 9.10/8.40/6.45; prothorax: length, 1.65/1.55/1.25; anterior width, 1.75/1.60/1.20; posterior width, 1.70/1.55/1.30; widest prothoracic width, 1.85/1.70/1.35; humeral width, 2.45/2.45/1.80; elytral length, 6.30/6.00/4.55.

Type material. Holotype male from FRENCH GUIANA: Piste de Kaw , pk 36,15/ XII/1991, attracted by light, Jean-Aimé Cerda col. [ex collection IRD #1317]( MNHN). Paratypes—FRENCH GUIANA: 41 km SE Roura on Kaw road (04°32.214’N / 52°07.420’W; 272 m), 1 female, 08.XII.2002, J. E. Eger col. ( RFMC). Antecume Pata (Maripa-Soula), 1 male (ex larva), 21.XI.2005, P. H. Dalens col. ( PHDC); 1 female (ex larva), 27.XI.2005, P. H. Dalens col. ( PHDC); 1 male (ex larva), 06.XII.2005, P. H. Dalens col. ( PHDC); 1 male (ex larva), 0 6.III.2006, P. H. Dalens col. ( PHDC); RNN des Nouragues, Camp Pararé (Régina), 1 female, 03.IX.2009, P. H. Dalens col. ( PHDC); Montagne des Chevaux (Roura), 1 female, 14.IV.2010, P. H. Dalens col. ( PHDC); 1 female, 28.III.2011, P. H. Dalens col. ( PHDC); 1 female, 22.II.2014, P. H. Dalens col. ( PHDC); 1 female, 27.IV.2014, P. H. Dalens col. ( PHDC); Montgne Pelée (Saül), 1 male, 21.III.2016, P. H. Dalens col. ( PHDC); Matiti, 2 specimens (unknown sex; ex larva), 26.XI.2006, J. L. Giuglaris col. ( JLGC); Bélizon, 1 specimen (unknown sex; ex larva), 05.VIII.2006, J. L. Giuglaris col. ( JLGC); ZA Wayabo Matiti, 1 specimen (unknown sex), 04.I.2014, J. L. Giuglaris col. ( JLGC); RD06 PK31 Kaw, 1 specimen (unknown sex), 15.II.2015, J. L. Giuglaris col. ( JLGC); Piste Coralie (pk 2; light trapping), 1 male, 23.III.1992, Annie Docquin & Lionel Sénécaux col. [ex collection IRD #1317]( MNHN).

Etymology. The new species is named after the late Lionel Sénécaux, who died in 1994 and collected many new species of Cerambycidae for the first author of the species.

Remarks. RΟsalba senecauxi sp. nov. resembles R. hΟνΟrei Touroult, 2007, but differs as follows: elytral pubescence sparser, not covering most basal half; oblique elytral band of pubescence not well-defined; femoral pubescence not obscuring integument; metatarsomere V longer than I–III together. In R. hΟνΟrei the elytral pubescence is distinctly denser, covering most of the basal half, the oblique elytral band is well-defined, femoral pubescence obscuring most of the integument; metatarsomere V shorter than I–III together. It differs from R. giesberti by the punctures on sides of the elytra distinctly coarser (finer in R. giesberti ), by the metaventrite lateral yellow band of pubescence slightly conspicuous (very distinct in R. giesberti ), by elytral oblique band of yellow pubescence longer (shorter, not reaching band close to suture in R. giesberti ), and by the elytra less parallel-sided (more so in R. giesberti ). It differs from R. strandiella by the smaller, distal pubescent macula of the elytra.

Figures

FIGURES 8–14. 8, Rosalba giesberti sp. nov., holotype male, lateral habitus. 9–12, Rosalba skillmani sp. nov., holotype female: 9, dorsal habitus; 10, lateral habitus; 11, ventral habitus; 12, head, frontal view. 13–14, Rosalba senecauxi sp. nov., paratype female:13, dorsal habitus; 14, head, frontalview.

FIGURES 15–20. 15–16, Rosalba senecauxi sp. nov., paratype male: 15, ventral habitus; 16, lateral habitus. 17–20, Rosalba morrisi sp. nov., holotype female:17, head, frontalview; 18, dorsal habitus; 19, ventral habitus; 20, lateral habitus.

FIGURES90–96. Dorsalhabitus:90, Rosalbasenecauxi sp.nov., holotype male; 91, Rosalba clinei sp.nov., paratype female; 92, R. stenodesma, holotype male. 93–96, R. dalensi, holotypemale: 93, dorsal habitus; 94, ventral habitus; 95, lateral habitus; 96, head, frontal view.