Rosalba giuglarisi 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 : 222-224

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

( Figs 97–100 )

Description. Female. Integument mostly dark brown, almost black; mouthparts and apex of labrum reddishbrown.

Head. Frons and area between antennal tuberclesfinely, abundantly punctate; with pale yellow pubescence partially obscuring integument; with some long, erect, dark setae close to eyes and base of antennal tubercles. Area between upper eye lobes with yellow pubescence obscuring integument, connected to narrow pubescent band behind upper eye lobes, glabrous on narrow are close to median longitudinal groove; with some long, erect dark setae close to eyes. Remaining surface of vertex finely, abundantly punctate; with band of yellow pubescence on each side of median longitudinal groove and transverse band of yellow pubescence close to prothorax (distinctly sparser than band along median longitudinal groove) connecting the former to band behind upper eye lobes; area between bands of yellow pubescence on vertex and area behind upper eye lobes with yellow pubescence distinctly exposing integument; band o yellow pubescence behind upper eye lobes widened toward lower eye lobe. Area behind lower eye lobes with yellow pubescence obscuring integument, interspersed with some long, erect dark setae close to eye. Median longitudinal groove distinct from area between antennal tubercles and prothoracic margin. Antennal tubercles finely, moderately abundantly punctate on base, minutely, densely punctate toward apex; with pale yellow pubescence partially obscuring integument. Area between antennal socket and eyes with pale yellow pubescence obscuring integument. Submentum subsmooth, nearly glabrous. Postclypeus with sculpture and pubescence as on frons on wide central area, smooth, glabrous laterally; with long, erect dark setae on punctate area. Labrum convex and coplanar with anteclypeus on basal half, inclined on distal half; with long, erect, dark and yellow setae on basal half; with fringe of golden setae on distal margin. Distance between upper eye lobes 0.1 times length of scape; in frontal view, distance between lower eye lobes 0.5 times length of scape. Antennae 2.0 times elytral length, reaching elytral apex at basal third of antennomere VIII; scape with long, erect dark setae throughout, primarily ventrally; pedicel and antennomeres III–X with long, erect dark setae ventrally (gradually sparser toward X); antennal formula (ratio) based on antennomere III: scape = 1.00; pedicel = 0.24; IV = 1.17; V = 1.09; VI = 1.02; VII = 0.95; VIII = 0.90; IX = 0.88; X = 0.81; XI = 0.88.

Thorax. Prothorax 1.05 times wider than long; sides slightly widened centrally, unarmed. Pronotum with on slightly distinct gibbosity on each side of anterior third; moderately finely, abundantly punctate; with central longitudinal band of yellow pubescence; sides with yellow pubescence obscuring integument, prolonged toward entire sides of prothorax; remaining surface with pale yellow pubescence distinctly exposing integument. Sides of prothorax with sculpture as on pronotum; with some long, erect dark setae. Prosternum moderately finely, abundantly punctate; with yellowish white pubescence, denser laterally. Prosternal process moderately finely, abundantly punctate; with yellowish white pubescence partially obscuring integument. Mesoventrite with sparse yellowish white pubescence centrally, denser laterally. Mesanepisternum, mesepímero and metanepisternum with yellow pubescence obscuring integument (except small area with yellowish white pubescence on mesanepisternum). Metaventrite with narrow band of yellow pubescence close to metanepisternum; remaining surface with yellowish white pubescence partially obscuring integument; with some long, erect dark setae. Scutellum with yellow pubescence obscuring integument. Elytra. Moderately coarsely punctate on basal half (punctures subaligned in rows on disc), smooth on distal half. Pubescence as follows: transverse, irregular, wide band of yellow pubescence placed after midlength, from lateral margin to at about middle of disc; with four longitudinal bands of yellow pubescence: one close to epipleura, from base to transverse band, one close to curvature, from base to transverse band, one on center of disc, from base to transverse band (basally fused with band close to curvature, distally narrowed), another from base to apex, slightly inclined toward suture, fused with anterior band on basal third of elytra; longitudinal band of yellow pubescence close to epipleura, from transverse band to apex; longitudinal band of yellow pubescence placed close to curvature on distal quarter, not reaching transverse band; longitudinal and on center of distal quarter, fused with longitudinal band close to suture; longitudinal band of yellowish white pubescence close to suture, placed on basal quarter; remaining surface with yellowish white pubescence distinctly exposing integument; apex obliquely truncate, with outer angle acutely projected. Legs. Femora with yellow pubescence not obscuring integument (more yellowish white on some areas). Metatarsomere I 0.9 times II–III together; metatarsomere V (without claws) 0.9 times as long as I–III together.

Abdomen. Ventrites with yellowish white pubescence partially obscuring integument (slightly denser laterally); with long, erect, sparse dark setae (more abundant on distal half of V); apex of ventrite V truncate, widely emarginate centrally.

Male. Antennae slightly longer (2.1 times elytral length), reaching elytral apex at basal third of antennomere VIII.

Dimensions in mm (holotype male/ paratype males/ paratype females). Total length, 6.80/6.40–7.30/5.00 – 6.95; prothorax: length, 1.30/1.08–1.20/0.99–1.30; anterior width, 1.25/1.07–1.150/0.99–1.20; posterior width, 1.25/1.20–1.43/0.93–1.20; widest prothoracic width, 1.40/1.30–1.52/1.04–1.40; humeral width, 1.80/1.70–2.02/ 1.47–1.75; elytral length, 4.95/4.40–5.07/3.42–4.80.

Type material. Holotype female from FRENCH GUIANA: Montagne des Chevaux ( Roura ; Automatic light trap), 24.V.2014, Dalens col. ( MNHN). Paratypes—FRENCH GUIANA: Montagne des Chevaux (Roura), 1 male, 22.XI.2014, Dalens col.( MZSP); 1 male, 16.I.2010, Dalens col. ( PHDC); 1 male, 28.III.2010, Dalens col. ( PHDC); 1 male, 14.IV.2010, Dalens col. ( PHDC); 1 male, 19.XII.2010, Dalens col. ( PHDC); 1 male, 02.I.2011, Dalens col. ( PHDC); 1 male, 16.I.2011, Dalens col. ( PHDC); 1 male, 01.II.2011, Dalens col. ( PHDC); 1 female, 13.III.2011, Dalens col. ( PHDC); 1 female, 28.III.2011, Dalens col. ( PHDC); 1 female, 19.XI.2011, Dalens col. ( PHDC); 1 female, 29.I.2012, Dalens col. ( PHDC); 1 female, 15.II.2014, Dalens col. ( PHDC); 1 female, 31.V.2014, Dalens col. ( PHDC); 1 male, 1 female, 13.XII.2014, Dalens col. ( PHDC); 2 males, 20.XII.2014, Dalens col. ( PHDC); 1 female, 26.XII.2015, Dalens col. ( PHDC); 1 female, 02.I.2016, Dalens col. ( PHDC); 1 female, 31.V.2016, Dalens col. ( PHDC); Montagne Cacao (Roura), 1 male, 05.XII.2008, Dalens col. ( PHDC); Montagne Pelée (Saül), 1 male, 25.VIII.2011, Dalens col. ( PHDC); Piste Tibourou pk 7 (Régina), 1 female (ex larva), 10.VI.2006, Dalens col. ( PHDC); Bélizon, 1 specimen (unknown sex; ex larva), 31.VIII.2006, Giuglaris col. ( JLGC); 1 specimen (unknown sex; ex larva), 15.VIII.2006), Giuglaris col. ( JLGC); piste de Bélizon, 1 specimen (unknown sex; ex larva), 20.XII.2013, Giuglaris col. ( JLGC); Wayabo (Matiti), 1 female, 17.XI.2012, Giuglaris col. ( JLGC).

Etymology. The new species is named for Jean-Louis Giuglaris (JLGC), collector of some of the paratypes.

Remarks. RΟsalba giuglarisi sp. nov. is similar to R. giesberti sp. nov., but differs as follows: lateral bands of yellow pubescence on pronotum fused with yellow pubescence on sides of prothorax; elytra with transverse band after midlength, reaching margin; distal pubescence on elytra forming bands. In R. giesberti , the lateral bands of yellow pubescence on pronotum is not fused with yellow pubescence on sides of prothorax, elytra with oblique band after midlength, not reaching margin, and distal pubescence on elytra not forming bands.

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.