Adetus pseudobacillarius Santos-Silva, Nascimento and Wappes, 2019

Santos-Silva, Antonio, Nascimento, Francisco E. de L. & Wappes, James E., 2019, Nomenclatural changes in American Apomecynini including description of new genera and species (Coleoptera: Cerambycidae), Insecta Mundi 716 (716), pp. 1-35 : 10-12

Adetus pseudobacillarius Santos-Silva, Nascimento and Wappes , sp. nov.

( Fig. 76–80 )

Description. Female. Integument mostly dark-brown, almost black in some areas; mouthparts reddish-brown, except yellowish-brown apex of palpomeres; elytra dark reddish-brown in posterior 2/3 irregularly interspersed with lighter areas; tarsi reddish-brown; scape (more dark-brown depending on light intensity), pedicel, antennomere III, and base of IV dark reddish-brown.

Head. Frons finely, abundantly punctate; with abundant yellowish-brown pubescence partially obscur- ing integument near eyes, and one irregular pubescent macula centrally on each side of median groove, between eyes and antennal tubercles. Vertex and area behind eyes with sculpturing as on frons; with yellowish-brown pubescence, except pale-yellow pubescence in central area behind eyes, sparser in sub-triangular area in center of vertex, obscuring integument in remaining surface. Genae about as long as lower eye lobe; finely (punctures finer than on frons), sparsely punctate; with yellowish-brown pubescence not obscuring integument, sparser toward apex. Antennal tubercles with sculpturing as on frons basally, gradually finer toward smooth apex; with yellowish-brown pubescence partially obscuring integument, slightly darker than on frons. Median groove slightly distinct from middle of frons to middle of area after upper eye lobes. Postclypeus with punctures slightly finer than on frons in wide central area, smooth laterally; with bristly yellowish-brown pubescence in wide central area, nearly entirely glabrous laterally. Labrum very finely punctate, inclined anteriorly; with yellowish-brown pubescence more abundant, with long, erect setae of same color interspersed near postclypeus, sparser in inclined area; anterior margin with dense fringe of golden setae. Distance between upper eye lobes 1.14 times length of scape; in frontal view, distance between lower eye lobes 1.65 times length of scape. Antennae 0.8 times elytral length, reaching about middle of elytra; scape, pedicel, and antennomere III with paleyellow pubescence nearly entirely obscuring integument; base and basal inner side of antennomere IV with pale-yellow pubescence, and remaining surface with dark reddish-brown pubescence; remaining antennomeres brown pubescent with a few longer, decumbent, pale-yellow setae interspersed; antennomeres IV–VIII with sparse, long, erect, dark setae ventrally (sparser toward VIII). Antennal formula (ratio) based on length of antennomere III: scape = 0.58; pedicel = 0.20; IV = 0.62; V = 0.40; VI = 0.36; VII = 0.34; VIII = 0.30; IX = 0.28; X = 0.24; XI = 0.26.

Thorax. Prothorax slightly rounded laterally from anterolateral angles to posterior quarter, then parallelsided. Pronotum with wide, shallow transverse sulcus in anterior third; coarsely, abundantly punctate except anterocentral area with sparse punctures; sides with dense pale-yellow pubescence, with inner margin of this area slightly narrowed toward posterior margin, and with semicircular notch before middle; central area with narrow longitudinal pale-yellow band in posterior half, moderately small, longitudinal pale-yellow pubescent band in center of anterior third, and small pale-yellow pubescent macula at middle of anterior margin; remaining surface of anterior margin with abundant yellowish-brown pubescence; remaining surface with sparse, short yellowish-brown setae, part of them emerging from punctures, some placed between punctures, sparser anteriorly and centrally. Sides of prothorax with sculpturing as in pronotum; with dense pubescence obscuring integument, pale-yellow in some areas, yellowish-brown in others, except small area placed centrally near pronotum, with distinctly sparse pubescence. Prosternum with yellowish-brown pubescence partially obscuring integument. Prosternal process with pale-yellow pubescence not obscuring integument. Mesoventrite coarsely, abundantly punctate; with yellowish-brown pubescence partially obscuring integument, except pale-yellow pubescence close to mesoventral process. Mesanepisternum and mesepimeron coarsely, abundantly punctate; with yellowish-brown pubescence partially obscuring integument, except sparse pubescence close to mesoventrite in mesanepisternum. Mesoventral process with dense pale-yellow pubescence. Metanepisternum and metaventrite coarsely, abundantly punctate; with yellowish-brown pubescence in metanepisternum and sides of metaventrite, not obscuring integument, and pale-yellow pubescence on remaining surface of metaventrite, partially obscuring integument. Scutellum with sparse pale-yellow pubescence.

Elytra. Coarsely, abundantly punctate in basal third, gradually finer, sparser toward apex; apices indi- vidually rounded. Pubescence as follows; with sparse tufts of yellowish-brown pubescence, with sparse setae of same color interspersed in semielliptical central area in anterior third; with small, elongate, dense tufts of pale-yellow pubescence in sides of dorsal surface about middle of elytra; remaining surface with yellowish-brown pubescence marbled with pale-yellow and white pubescence (white pubescent, especially in posterior half), sparse in several irregular areas.

Legs. Profemora with yellowish-brown pubescence, with short pale-yellow and white setae interspersed; meso- and metafemora with yellowish-brown pubescence (dark yellowish-brown in some irregular areas), slightly sparser than in profemora, with short, nearly scale-shaped white setae interspersed; profemora distinctly wider than meso- and metafemora, with metafemora thinner than mesofemora. Inner side of apex of protibiae with distinctly spiniform projection; pubescence and white setae as in femora, following the same pattern of distribution from protibiae to metatibiae.

Abdomen. Ventrites finely, sparsely punctate; with yellowish-brown pubescence not obscuring integu- ment in ventrite I, gradually denser, more pale-yellow toward V; with fringe of longer pale-yellow setae in apex of I–IV.

Dimensions (mm). Total length 8.30; prothoracic length 1.90; anterior prothoracic width 1.70; posterior prothoracic width 1.65; widest prothoracic width 1.75; humeral width 2.10; elytral length 6.00.

Type material. Holotype female from COSTA RICA, Puntarenas: Prv. Monteverde, 5–7.VI.1983, J.E. Wappes col. ( FSCA, previously in ACMT).

Remarks. Adetus pseudobacillarius sp. nov. is similar to A. tayronus Galileo and Martins, 2003 ( Fig. 82 ) by the presence of elongate pubescent tuft about middle of the elytra but differs by the punctures on pronotum distinctly more abundant. It is also very similar in appearance to A. bacillarius , including its pronotal pubescence and sculpturing and by the presence of a tooth on the inner side of the protibiae, but differs by the denser elytral pubescence, the pubescent tuft in middle of the elytra distinctly larger and the elytral apices ( Fig. 80 ) narrower and rounded. In A. bacillarius the elytral pubescence is distinctly sparser ( Fig. 14 ), the pubescent tuft in middle of the elytra is shorter ( Fig. 14 ), and the elytral apices are obliquely truncate ( Fig. 81 ).

Etymology. This species is remarkably similar in appearance to Adetus bacillarius , hence its name.

Figures

Figures 76–82. Adetus spp. 76–80) Adetus pseudobacillarius sp. nov., holotype female: 76) Dorsal habitus. 77) Ventral habitus. 78) Lateral habitus. 79) Head, frontal view. 80) Elytral apex. 81) Adetus bacillarius, male, elytral apex. 82) Adetus tayronus, paratype female, dorsal habitus.

Figures 14–21. Adetus spp. 14–16) Adetus bacillarius, female: 14) Dorsal habitus. 15) Ventral habitus. 16) Lateral habitus. 17–21) Adetus insularis: 17) Holotype, dorsal habitus. 18) Head, frontal view, male. 19) Dorsal habitus, male. 20) Ventral habitus, male. 21) Lateral habitus, male.