Rosalba nearnsi 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 : 224-225

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

( Figs 101–104 )

Description. Female.Integument dark brown, almost black.

Head. Frons finely punctate toward antennal tubercles, smooth toward clypeus; with yellowish white pubescence partially obscuring integument, except glabrous, narrow, center-longitudinal area; with long, erect, dark, thick setae close to eyes. Area between antennal tubercles somewhat depressed, finely, sparsely punctate except smooth area along median longitudinal groove; with yellowish white pubescence partially obscuring integument, except glabrous area along median longitudinal groove; with some long, erect, dark, thick setae close base of antennal tubercles. Area between upper eye lobes with narrow band of yellowish white pubescence close to eyes, connected to band of pubescence behind upper eye lobes; area along median longitudinal groove glabrous; with some long, erect brown setae close to eyes. Remaining surface of vertex and area behind upper eye lobes with pale yellow pubescence except narrow, glabrous area along median longitudinal groove and wide, subtriangular area from near center of vertex to behind upper eye lobes (narrowed toward behind eyes) with yellowish white pubescence distinctly exposing integument; with some long, erect, brown setae close to eyes. Area behind lower eye lobes tumid, nearly smooth close to eye, finely, abundantly punctate toward prothorax; with pale yellow pubescence obscuring integument close to eye, glabrous toward prothorax; with some long, erect, dark, thick setae on tumid area. Median longitudinal groove distinct from near clypeus to near prothorax, slightly carinate between upper eye lobes. Antennal tubercles nearly smooth; with yellowish white pubescence partially obscuring integument. Area between antennal socket and eyes with yellowish white pubescence partially obscuring integument. Submentum with minute, sparse yellowish white pubescence interspersed with some long, erect, dark, thick setae. Postclypeus finely, sparsely punctate on wide central area, smooth laterally; with yellowish white pubescence obscuring integument on punctate area, glabrous laterally; with long, erect, dark, thick setae on punctate area. Labrum convex and coplanar with anteclypeus on basal 3/4, inclined on distal quarter; finely, moderately sparsely punctate on basal half (punctures coarser than on frons); with golden, suberect setae not obscuring integument throughout; with fringe of golden pubescence on distal margin; with long, erect, dark, thick setae on basal 3/4. Distance between upper eye lobes 0.05 times length of scape; in frontal view, distance between lower eye lobes 0.50 times length of scape. Antennae 2.35 times elytral length, reaching elytral apex at distal third of antennomere VII; scape with long, erect, sparse, thick, dark setae throughout; pedicel and antennomeres III–IX with long, erect, dark setae ventrally (sparser toward IX); antennal formula (ratio) based on antennomere III: scape = 0.91; pedicel = 0.15; IV = 1.20; V = 1.14; VI = 1.08; VII = 1.03; VIII = 1.00; IX = 1.00; X = 0.95; XI = 1.12.

Thorax. Prothorax 1.1 times wider than long; side with small, conical tubercle at about midlength. Pronotum moderately coarsely, abundantly punctate except on smooth, narrow basal and distal areas; with three longitudinal bands of yellow pubescence, central most widened centrally; remaining surface with yellowish white pubescence distinctly exposing integument; with some long, erect, dark setae laterally. Sides of prothorax with sculpture as on pronotum; with wide central band with yellow pubescence obscuring integument; remaining surface with yellowish white pubescence exposing integument. Prosternum moderately finely and sparsely punctate; with yellowish white pubescence, centrally not obscuring integument, denser laterally. Prosternal process coarsely, moderately sparsely punctate; with yellowish white pubescence not obscuring integument, denser, somewhat longer centrally on distal third. Mesoventrite centrally with yellowish white pubescence exposing integument, denser laterally. Mesanepisternum with yellow pubescence obscuring integument on half closer to elytra, with yellowish white pubescence on half closer to mesoventrite. Mesepimeron and metanepisternum with yellow pubescence obscuring integument. Metaventrite with yellowish white pubescence partially obscuring integument (more yellow depending on angle of light). Scutellum with yellowish white pubescence partially obscuring integument. Elytra. Moderately coarsely, abundantly punctate on basal half, gradually finer, sparser toward apex. Pubescence as follows: with oblique, wide band of yellow pubescence at about midlength, starting at lateral margin and not reaching suture; longitudinal band with yellow pubescence near epipleura, from base to oblique band; with longitudinal band close to curvature, from base to oblique band, yellow on base, yellowish white toward its midlength, yellow toward apex; longitudinal band from base to oblique band, placed at about center of disc, distinctly narrow, curved on its basal third, widened, straight on remaining surface; longitudinal band along suture, from apex of basal sixth to apex (narrowed at about central area), somewhat yellow on its basal third, gradually yellowish white toward apex; three narrow, longitudinal bands of yellowish white pubescence, from oblique band toward apex (partially fused with band close to suture at apex); with yellowish white band of pubescence close to suture, from scutellum to at about midlength (narrowed toward its apex); pubescence on basal half between longitudinal bands yellowish white, partially obscuring integument, except subelliptical macula on basal sixth close to scutellum and elongate macula on basal close to outer side of longitudinal band on center of disc with yellowish white pubescence distinctly exposing integument; distal area between longitudinal bands with yellowish white pubescence distinctly exposing integument; apex slightly obliquely truncate. Legs. Femora with yellowish white pubescence not obscuring integument. Metatarsomere I 0.75 times II–III together; metatarsomere V (without claws) 1.2 times as long as I–III together.

Abdomen. Ventrites with yellowish white pubescence partially obscuring integument; with some long erect, dark setae (more abundant on distal half of V); distal third of ventrite V depressed, with distal margin truncate, slightly, widely emarginate centrally.

Male. Antennae slightly longer (2.4 times elytral length); apex of abdominal ventrite V not depressed.

Dimensions in mm (holotype female/ paratype males/ paratype female). Total length, 8.75/6.00–7.90/7.40; prothorax: length, 1.60/1.15–1.45/1.35; anterior width, 1.65/1.10–1.45/1.40; posterior width, 1.80/1.20–1.50/1.45; widest prothoracic width, 1.90/1.30–1.55/1.60; humeral width, 2.45/1.60–2.20/2.10; elytral length, 6.25/4.00–5.45/ 5.15. Only one paratype female was measured.

Type material. Holotype female (ex larva) from FRENCH GUIANA: Kaw , 28.XII.2006, Giuglaris col. ( MNHN, former JLGC). Paratypes—FRENCH GUIANA: Bélizon , 1 male (ex larva), 15.X.2006, Giuglaris col. ( MZSP); 1 specimen (unknown sex; ex larva), 31.VIII.2006, Giuglaris col. ( JLGC); Kaw , 1 specimen (unknown sex; ex larva), 15.XI.2006, Giuglaris col. ( JLGC); Montagne de Chevaux ( Roura ), 1 male, 10.I.2009, Dalens col. ( PHDC); 1 male, 28.III.2011, Dalens col. ( PHDC); 1 female, 09.VII.2011, Dalens col. ( PHDC); 1 male, 1 female, 26.XII.2015, Dalens col. ( PHDC); 1 male, 13.VIII.2016, Dalens col. ( PHDC); Montagne de Kaw pk 30 (Roura), 1 male (ex larva), 10.IV.2004, Dalens col. ( PHDC); ZA Wayabo Matiti, 1 specimen (unknown sex), 11.X.2013, Giuglaris col. ( JLGC); 1 specimen (unknown sex), 26.X.2013, Giuglaris col. ( JLGC); 1 specimen (unknown sex), 28.XII.2013, Giuglaris col. ( JLGC); 1 specimen (unknown sex), 11.XI.2009, Giuglaris col. ( JLGC); RN2 PK 125 piste Kapiri, 1 specimen (unknown sex), 16.IX.2009, Giuglaris col. ( JLGC).

Etymology.The new species is named in honor of Eugenio H. Nearns, for his friendship and contributions to knowledge of Cerambycidae .

Remarks. RΟsalba nearnsi sp. nov. is similar to RΟsalba mΟrrisi sp. nov., but differs as follows: sides of prothorax with small, conical tubercle; metaventrite without bands of yellow pubescence. In R. mΟrrisi, the sides of prothorax are unarmed, and metaventrite has 2 bands of yellow pubescence. It is also slightly similar to R. maculΟsa Galileo & Martins, 2013, but differs primarily by the oblique band placed at about elytral midlength entire (divided in R. maculΟsa), and by the elytra without longitudinal band of white pubescence from near base to near apex placed near lateral curvature (present in R. maculΟsa).

Figures

FIGURES 97–104. 97–100, R. giuglarisi, holotype male:97, dorsal habitus; 98, ventral habitus; 99, lateral habitus; 100, head, frontal view. 101–104, R. nearnsi, holotype female: 101, head, frontal view; 102, dorsal habitus; 103, ventral habitus; 104, lateral habitus.