Bebelis nearnsi, Santos-Silva, 2022

Santos-Silva, Antonio, 2022, New species, revalidation, synonymies, and new records in Bebelis Thomson (Coleoptera, Cerambycidae, Lamiinae, Apomecynini), Zootaxa 5092 (4), pp. 401-428 : 406-408

Bebelis nearnsi sp. nov.

( Figs 16–20 )

Description. Holotype male. Head capsule mostly dark brown, slightly lighter on anterior area of frons, except reddish-brown posterior area of gulamentum; scape and pedicel dark brown; antennomeres III–XI orangish-brown basally (X and XI more reddish brown), brown on remaining surface. Prothorax mostly dark brown, except irregular black are on each side of central region of anterior half of pronotum, and some areas on ventral surface. Ventral surface of meso- and metathorax dark brown with some areas blackish. Elytra black on triangular circum-scutellar region, and large central macula placed about middle, from suture to epipleural margin; remaining surface mostly orangish brown, except brown oblique macula starting on apex of black central macula, and brownish irregular maculae on posterior third. Femora black, except dark reddish-brown dorsal surface of club; tibiae dark brown basally and apically, reddish brown on wide central area; tarsi dark brown except reddish brown wide central area of tarsomere V. Ventral surface of abdomen mostly dark brown with irregular dark reddish brown areas.

Head. Frons moderately finely and sparsely punctate; with abundant light yellowish-brown pubescence not obscuring integument, slightly more yellowish-white centrally close to clypeus; with one long, erect brownish seta on each side close to eyes. Vertex with sculpturing as on frons; with abundant yellowish-brown pubescence not obscuring integument, denser between antennal tubercles. Area behind upper eye lobes with sculpturing as on vertex; with abundant yellowish-brown pubescence close to vertex and lower eye lobes, and brownish pubescence not obscuring integument centrally. Area behind lower eye lobes moderately coarsely and sparsely punctate; with abundant yellowish-brown pubescence toward upper eye lobes, slightly sparser, pale yellow toward ventral surface. Genae finely, somewhat rugose-punctate; with abundant yellow pubescence close to eyes, sparser toward apex. Wide central area of postclypeus with pale yellow pubescence directed toward central region close to frons, and pale yellow pubescence directed forward close to anteclypeus; sides with sparse pale yellow pubescence; with one long, erect dark seta on each side of wide central area. Anterior 2/3 of labrum with moderately abundant, long, suberect setae, which are brownish basally, gradually yellowish-white toward apex; anterior margin with dense fringe of yellowish-brown setae. Gulamentum smooth and glabrous, except a few short, decumbent whitish setae close to anterior margin. Distance between upper eye lobes 0.18 times distance between outer margins of eyes; in frontal view, distance between lower eye lobes 0.59 times distance between outer margins of eyes.Antennae 1.4 times elytral length, reaching elytral apex. Scape cylindrical, moderately finely rugose-punctate; with yellowish-brown pubescence not obscuring integument, and a few long, erect dark setae ventrally. Pedicel with yellowish-brown pubescence not obscuring integument, and a few long, erect dark setae ventrally. Flagellomeres with yellowish-brown pubescence not obscuring integument, except white pubescence basally (pubescence sparser toward apical segments); with long, erect dark setae ventrally on III–IX; with short, erect, sparse yellowish setae interspersed dorsally and apex of XI. Antennal formula based on length of antennomere III: scape = 1.05; pedicel = 0.31; IV = 1.10; V = 0.79; VI = 0.68.; VII = 0.68; VIII = 0.65; IX = 0.58; X = 0.53; XI = 0.68.

Thorax. Prothorax as wide as long; sides slightly rounded from anterolateral angles to posterior fifth, then subparallel-sided. Pronotum coarsely, densely punctate; sides with dense yellowish-brown pubescence obscuring integument, except longitudinal white pubescent band from posterior margin to about middle; central region with large, arrow-shaped yellowish-brown pubescent band from anterior margin to before middle, and inverted sub Ushaped yellowish-brown pubescent band from apex of anterior band to near posterior margin; remaining surface with sparse, both yellowish-brown and brownish setae. Sides of prothorax with sculpturing as on pronotum; with dense yellowish-brown pubescence obscuring integument, except whitish longitudinal pubescent band on center of posterior third, and postcoxal process with moderately abundant yellowish-brown pubescence close to procoxal cavity, and sparse yellowish-white pubescence on remaining surface. Prosternum coarsely, moderately abundantly punctate; with abundant yellowish-brown pubescence not obscuring integument, and yellowish-white setae interspersed. Prosternal process coarsely punctate; with yellowish-white pubescence not obscuring integument; narrowest area 0.22 times procoxal width; apex as wide as procoxal width. Mesoventrite coarsely, moderately sparsely punctate, except smooth sides; with yellowish-brown pubescence not obscuring integument, denser close to mesocoxal cavities, except glabrous smooth area. Mesanepisternum coarsely, abundantly punctate; with dense whitish pubescence obscuring integument close to elytra (sides of this area with yellowish-brown pubescence), and very sparse brownish pubescence and a few yellowish-brown setae interspersed on remaining surface. Mesepimeron with sparse brownish pubescence. Mesoventral process coarsely, sparsely punctate; with yellowish-white pubescence not obscuring integument; apex 0.49 times mesocoxal cavity. Metanepisternum coarsely, abundantly punctate; with abundant yellowish-brown pubescence not obscuring integument. Metaventrite coarsely, abundantly punctate; sides with abundant yellowish-brown pubescence not obscuring integument; wide central area with yellowish-white pubescence not obscuring integument (yellowish-white pubescence sparser than yellowish-brown pubescence). Scutellum with abundant yellowish-brown pubescence and whitish pubescence interspersed (pubescence sparser centrally). Elytra. Coarsely, moderately abundantly punctate, punctures gradually finer and sparser toward apex; black triangular circum-scutellar region with sparse yellowish-brown pubescence; area between black circum-scutellar region and black central macula with abundant yellowish-brown pubescence, except fragmented white pubescent on anterior fifth close to circum-scutellar black region, irregular, large white pubescent macula centrally close to black central macula, and irregular white pubescent spot on lateral curvature of anterior fifth; black central area mostly with sparse brownish pubescence and yellowish-brown setae interspersed (yellowish-brown setae forming a fragmented longitudinal band on center of dorsal surface); remaining surface with abundant yellowish-brown pubescence not obscuring integument, and irregular white pubescent maculae on posterior quarter; apex strongly obliquely truncate, making the outer apex acutely projected. Legs. Femora striate-punctate; with yellowish-brown pubescence not obscuring integument dorsally, and yellowish-white pubescence ventrally; tibiae with yellowishwhite pubescence not obscuring integument, except brown, bristly pubescence on posterior third of ventral surface, and thick, erect dark setae on dorsal third of mesotibiae and dorsal quarter of metatibiae. Tarsomeres I–II with brownish pubescence not obscuring integument and yellowish-brown setae interspersed; tarsomeres III–V with sparse brownish pubescence, sparser on IV–V.

Abdomen. Ventrites coarsely, abundantly punctate, except smooth central apex of 1–4; with dense yellowishbrown pubescence laterally, longitudinal yellowish-white pubescent band close to lateral pubescence, moderately sparse yellowish-white pubescence on center of 1–4, abundant on center of 5.

Dimensions (mm). Total length, 6.55; prothoracic length, 1.25; anterior prothoracic width, 1.05; posterior prothoracic width, 1.15; maximum prothoracic width, 1.25; humeral width, 1.55; elytral length, 4.70.

Type material. Holotype male from BOLIVIA, La Paz : Madidi National Park, 14º30’S, 67º29’W, 243 m, 24–30.IX.2007, I. Swift, E. Nearns & K. Miller leg. ( FSCA).

Etymology. The new species is named in honor of Eugenio H. Nearns, one of the collectors of the holotype.

Remarks. Bebelis nearnsi sp. nov. is similar to B. pseudolignosa Breuning, 1942 ( Figs 21–24 ), but differs as follows: distance between upper eye lobes about as wide as one upper lobe ( Fig. 16 ); lower eye lobes longer than genae ( Fig. 20 ); central area of the elytra mostly with sparse brownish pubescence ( Fig. 16 ); and elytral apex strongly obliquely truncate ( Fig. 16 ). In B. pseudolignosa , the distance between upper eye lobes is wider than width of one upper lobe ( Fig. 22 ), lower eye lobes are slightly shorter than genae ( Fig. 21 ) (according to Breuning (1942), they are slightly longer than genae, but, apparently, he measured using the frontal area of the genae, and not the true length), central area of the elytra mostly with yellowish-brown pubescence ( Figs 22, 24 ), and the elytral apex is not strongly obliquely truncate, and is somewhat emarginate ( Fig. 22 ). Bebelis nearnsi also differs from B. lignea (Bates, 1866) by the body stouter, different elytral pubescent pattern, and elytral apex less projected ( Fig. 16 ); in B. lignea , the body is slender, the elytral pubescence has a different pattern, and the elytral apex is strongly projected ( Fig. 25 ).

Figures

FIGURES 16–25. Bebelis spp. 16–20) B. nearnsi sp. nov., holotype male: 16) Dorsal habitus; 17) Ventral habitus; 18) Lateral habitus; 19) Head, frontal view; 20) Lower eye lobe, lateral view. 21–23) B. pseudolignosa Breuning, 1942, female from Argentina (Salta, Rosario de Lerma): 21) Lower eye lobe, lateral view; 22) Dorsal habitus; 23) Lateral habitus. 24) B. pseudolignosa, holotype, by Jesus Santiago Moure. 25) Dorcasta prolongata Fisher, 1947 (= B. lignea (Bates, 1866)), holotype male, dorsal habitus.