Dorcasta birai, Bezark & Santos-Silva & Nascimento, 2018

Bezark, Larry G., Santos-Silva, Antonio & Nascimento, Francisco E. De L., 2018, A synopsis of the genus Dorcasta Pascoe, 1858 (Coleoptera, Cerambycidae, Lamiinae, Apomecynini), Zootaxa 4399 (1), pp. 49-68 : 61-63

Dorcasta birai , sp. nov.

( Figs 24–28 )

Description. Integument mostly dark brown with some areas black; mouthparts reddish-brown.

Head. Frons moderately finely and abundantly punctate; with wide yellow, lateral pubescent band, from near antennal tubercles to apex of genae; with yellowish-white (more whitish depending on angle of light source), slender scale-like setae on wide central area, not obscuring integument; with a few long, dark erect setae interspersed on yellow pubescent band . Antennal tubercles smooth; with setae as on central area of frons, but shorter and sparser . Dorsal surface with sculpturing as on frons; with moderately wide pale yellow pubescent band from upper eye lobes to prothoracic margin, narrowly prolonged along upper eye lobes toward base of antennal tubercles ; central area between pale yellow bands with yellowish-brown pubescence partially obscuring integument; with a few long, dark erect setae close to upper eye lobes . Area behind lower eye lobes with sculpturing as on frons; with moderately wide, oblique pale yellow pubescent band, from eye to prothoracic margin; remaining surface with yellowish-brown pubescence partially obscuring integument (more yellowish depending on angle of light source); with a few long, dark erect setae . Gena moderately coarsely, sparsely punctate; with yellowish-brown pubescence partially obscuring integument, except yellow pubescent band starting on frons, with sparse scale-like setae between yellow band and apex, apex glabrous; with a few long, dark erect setae. Distance between upper eye lobes 0.2 times length of scape; in frontal view, distance between lower eye lobes 0.6 times length of scape. Antennae in female 1.37 times elytral length, almost reaching elytral apex; in male, 1.48 times elytral length, slightly surpassing elytral apex. Scape and pedicel with sparse long, dark erect setae, about as long as to longer than diameter of segment; more abundant ventrally) . Antennomeres III– XI with long (from about as long as diameter of antennal segment to almost 3 times longer), dark erect, setae ventrally, usually sparser on XI . Antennal formula (ratio) based on length of antennomere III (female/male): scape = 1.20/1.20; pedicel = 0.26/0.30; IV = 1.15/1.10; V = 1.00/1.00; VI = 0.85/0.85; VII = 0.79/0.75; VIII = 0.65/0.65; IX = 0.62/0.60; X = 0.53/0.50; XI = 0.62/0.65.

Thorax. Prothorax cylindrical, nearly parallel-sided. Pronotum coarsely, moderately abundantly punctate; with wide, longitudinal pale yellow pubescent band from base to apex on each side, and narrow pale yellow pubescent band centrally; with narrow, fragmented white pubescent band close to lateral yellow pubescent bands; remaining surface with yellowish-brown pubescence not obscuring integument; with sparse long, dark erect, setae throughout. Sides of prothorax coarsely , moderately sparsely punctate; with wide, longitudinal pale yellow pubescent band close to ventral side, margined with narrow, fragmented, white pubescent band; remaining surface with yellowish- brown pubescence partially obscuring integument, except area of epimeron close to prosternal process with white, scale-like setae, and short, narrow pale yellow pubescent band close to procoxal cavities and distal margin; prosternal process with minute scale-like setae and yellowish white setae centrally and distally. Ventral side of meso- and metathorax with white scale-like setae interspersed with short yellowish-white pubescent areas (especially on mesoventral process and center of metaventrite) , except wider laterally (especially on mesanepisternum and mesepimeron), longitudinal yellow pubescent band, from mesanepisternum to apex of metaventrite, also covering base of metanepisternum. Mesoventrite and sides of metaventrite coarsely , sparsely punctate. Scutellum with pale yellow pubescence obscuring integument. Elytra. Coarsely, moderately abundantly punctate; apex triangularly projected laterally, slightly concave toward short sutural projection; with moderately abundant long, dark erect, setae throughout; pubescence as follows : three longitudinal pale yellow pubescent bands (two dorsal ones fused at apex), two dorsally (innermost starting at about apex of basal ninth; outermost from base to apex; both distinctly separate until near apex), another laterally, from base to apex; eight narrow, longitudinal white pubescent bands, one close to each side of yellow pubescent bands, one between dorsal and lateral yellow pubescent bands, another close to lateral margin; one narrow longitudinal band close to suture on basal quarter; remaining surface yellowish pubescent not obscuring integument; nearly all surface with minute yellowish and whitish scale-like setae . Legs. Metafemora moderately widened in female ( Fig. 26 ), more so in male. Femora with yellowish-white pubescence, abundantly interspersed with minute yellowish scale-like setae; with sparse, long, dark erect setae.

Abdomen. Ventrites moderately finely, sparsely punctate; with yellow pubescence laterally, connected along distal margin of each ventrite, and minute whitish scale-like setae on remaining surface.

Dimensions (mm), holotype female/ paratype female. Total length, 9.60/9.10; prothoracic length, 1.80/1.65; basal prothoracic width, 1.45/1.40; distal prothoracic width, 1.40/1.40; greatest prothoracic width, 1.50/1.45; humeral width, 1.85/1.80; elytral length, 6.85/6.35.

Type material. Holotype female from BRAZIL, Goiás : Aruan (Rio Araguaia), X.1960, no collector indicated (former Diringshofen collection) ( MZSP) . Paratype male, same data as holotype except V.1960 ( MZSP) .

Remarks. Dorcasta birai sp. nov. is similar to D. crassicornis ( Figs 18–23 , 35–37 ), but differs by the presence of minute scale-like setae on nearly the entire body (absent in D. crassicornis ), and by the frons without dense pubescence centrally ( Fig. 28 ) (densely pubescent in D. crassicornis ).

Etymology. The new species is named after the late Ubirajara Ribeiro Martins de Souza (Bira).

Figures

FIGURES20–25. 20–23, Dorcasta crassicornis: 20, lateral habitus, male; 21, head, frontalVieW, male; 22, metafemora,male; 23, metafemora, female. 24–25, Dorcasta birai sp. nov., holotype female: 24, dorsal habitus; 25, lateral habitus.

FIGURES 26–32. 26–28, Dorcasta birai sp. nov., holotype female: 26, Ventral habitus; 27, head, frontal VieW; 28, frons. 29– 32, Dorcasta rifkindisp. nov., holotype male: 29, lateral habitus; 30, head, frontalVieW;31, dorsal habitus;32, Ventral habitus. SlENDER SCAlE-lIKE SETAE; WITH SPARSE lONG, DARK ERECT, SETAE. PROSTERNUM COARSEly, SPARSEly PUNCTATE; WITH MINUTE

FIGURES 14–19. 14–17, Dorcasta parkeri: 14, Ventral habitus, holotype male; 15, lateral habitus, holotype male; 16, metafemora, holotype male; 17, metafemora, paratype female. 18–19, Dorcasta crassicornis, male: 18, dorsal habitus; 19, Ventral habitus.

FIGURES 33–38. 33, Dorcasta singularis, holotype male, dorsal habitus. 34, D. implicata, unknoWn seX, dorsal habitus. 35– 37, D. crassicornis, holotype: 35, dorsal habitus; 36, head, frontal VieW; 37, labels. 38, D. quadrispinosa, female, dorsal habitus.