Rosalba skelleyi, Bezark & Santos-Silva, 2019

Bezark, Larry G. & Santos-Silva, Antonio, 2019, Synonymies and seven new species in Lamiinae from the Neotropical Region (Coleoptera, Cerambycidae), Zootaxa 4648 (1), pp. 92-110 : 98-99

Rosalba skelleyi sp. nov.

( Figures 13–17 )

Description. Female. Integument mostly dark brown, blackish on some areas, especially dorsal surface of head and basal half of elytra; mouthparts with some areas dark reddish-brown; central area of mandibles dark reddishbrown; scape brown; pedicel and antennomeres dark reddish-brown; tibiae mostly dark brown (dark reddish-brown depending on light intensity); tarsi mostly dark reddish-brown; abdominal ventrite V dark reddish-brown basally, gradually lighter toward apex.

Head. Frons moderately finely, abundantly punctate; with abundant light yellowish-brown pubescence not obscuring integument; with a few long, erect dark setae close to eyes. Vertex and area behind eyes with sculpturing as on frons; with light yellowish-brown pubescence obscuring integument; with a few long, erect dark setae close to upper eye lobes. Antennal tubercles moderately finely, abundantly punctate basally, nearly smooth toward apex; pubescence as on frons. Genae moderately finely, sparsely punctate, except smooth distal area, and finely striate central area; with dense light yellowish-brown pubescence obscuring integument except smooth distal area and wide central area with sparse yellowish-brown pubescence; with a few long, erect dark setae. Postclypeus with sculpturing and pubescence as on frons on wide central area, smooth and glabrous laterally; with a few long, erect dark setae on pubescent area. Labrum with short, decumbent yellowish setae near anteclypeus, with long brownish setae directed forward on remaining surface, and fringe of yellow setae anteriorly. Distance between upper eye lobes 0.19 times length of scape; in frontal view, distance between lower eye lobes 0.80 times length of scape. Antennae 1.7 times elytral length, reaching elytral apex near apex of antennomere IX. Scape coarsely, abundantly punctate; abruptly widened near base; with sparse yellowish-brown pubescence. Pedicel and antennomeres with sparse yellowish-brown pubescence (more yellowish-white toward distal segments), with long, erect, dark setae ventrally, gradually shorter toward X, absent on XI. Antennal formula (ratio) based on length of antennomere III: scape = 1.44; pedicel = 0.39; IV = 1.61; V = 1.33; VI = 1.27; VII = 1.22; VIII = 1.05; IX = 1.00; X = 0.83; XI = 1.11.

Thorax. Prothorax wider than long; sides slightly rounded in anterior 2/3, narrowed on distal third. Pronotum, in side view, convex on anterior 2/3; coarsely, densely punctate; with wide, central light yellowish-brown pubescent band, narrowly fused along anterior and posterior margins with pubescence of same color as sides; area on each side of central pubescent band with sparse light yellowish-brown pubescence. Sides of prothorax coarsely, densely punctate; with dense light yellowish-brown pubescence partially obscuring integument. Prosternum with abundant light yellowish-brown pubescence laterally, sparse centrally and on prosternal process. Narrowest area of prosternal process 0.2 times procoxal width. Ventral surface of meso- and metathorax with dense light yellowish-brown pubescence, distinctly sparser on wide central area of mesoventrite, slightly less dense on central area of metaventrite. Scutellum with light yellowish-brown pubescence obscuring integument. Elytra. Parallel-sided on anterior 3/4, gradually narrowed posteriorly toward rounded apex; coarsely, abundantly punctate on basal half, gradually finely, sparsely punctate on distal half; dorsal surface with three longitudinal light yellowish-brown pubescent bands, one sutural, slightly surpassing apex of basal third, two from base to apex (fused at distal quarter of elytra); distal area of sutural band partially fused with second innermost longitudinal band, and this latter partially fused with the outermost longitudinal band in same region; outermost longitudinal band fused with dense lateral pubescence from about middle of elytra to beginning of distal third; inclined area with dense light yellowish-brown pubescence, from base to apex; remaining surface with sparse, slightly conspicuous brownish pubescence. Legs. Femora and tibiae wish sparse yellowish-brown pubescence, lighter, slightly denser in profemora and protibiae; distal half of dorsal surface of meso- and metatibiae with long, erect, thick dark setae.

Abdomen. Ventrites with abundantly light yellowish-brown pubescence not obscuring integument.

Dimensions (mm). Total length, 4.15; prothoracic length, 0.75; anterior prothoracic width, 0.85; posterior prothoracic width, 0.75; maximum prothoracic width, 0.90; humeral width, 1.20; elytral length, 2.90.

Type material. Holotype female from BOLIVIA, Santa Cruz: Potrerillo Del Guendá (350-400 m; 17º40’S 63º27’W; ex. cut wood), 22-24.IX.2012, J. Wappes and P. Skelley col. ( FSCA, ex. ACMT).

Remarks. Rosalba skelleyi sp. nov. is similar to R. strandi (Breuning, 1943) ( Fig. 18 ), but differs especially by the eyes being coarsely granulated ( Fig. 17 ). It is also similar to R. clinei Tavakilian, Santos-Silva & Galileo, 2018 (see photograph of the holotype at Bezark 2019), differing by the stouter body, different elytral pubescence pattern, and the rounded elytral apex (narrowly truncate in R. clinei ).

Etymology. The species is named in honor of Paul E. Skelley ( FSCA), one of the collectors of the holotype.

Figures

FIGURES 13–18. Rosalba skelleyi, holotype female: 13) Dorsal habitus; 14) Ventral habitus; 15) Lateral habitus; 16) Head, frontal view; 17) Lower eye lobe. 18) Rosalba strandi, lower eye lobe.