Adetus monteverdensis 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 : 8-10

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

( Fig. 29–32 )

Description. Male. Integument blackish except dark reddish-brown mouthparts, lighter on apex of palpomeres.

Head. Frons coarsely, abundantly punctate; with light yellowish-brown pubescence not obscuring integument, yellower close to eyes, rather evenly interspersed with short white setae. Vertex coarsely, abundantly punctate except smooth area close to prothoracic margin; center of area between antennal tubercles with dense yellowish pubescence, and sides with pubescence as on frons; area between upper eye lobes with pubescence as on frons, but distinctly sparser and shorter, except narrow yellowish pubescence close to eyes; remaining surface of vertex with light yellowish-brown pubescence nearly obscuring integument, shorter and slightly thicker than on frons. Area behind eyes moderately coarsely, abundantly punctate close to eye (this area widened and punctures distinctly coarser toward ventral surface of lower eye lobe); with light yellowish-brown pubescence partially obscuring integument, but not obscuring punctures, gradually, slightly sparser toward ventral surface of lower eye lobe. Genae 1.7 times length of lower eye lobe; coarsely, abundantly punctate close to inferior side of lower eye lobe, smooth on remaining surface; with dense light yellowish-brown pubescence not obscuring integument, sparser toward apex, with short white setae interspersed. Antennal tubercles coarsely, abundantly punctate basally, very finely punctate, nearly smooth toward apex; pubescence as on central area of frons, except nearly glabrous apex. Median groove lacking in frons, distinct from area between antennal tubercles and prothoracic margin. Postclypeus coarsely sparsely punctate; pubescence as on central area of frons, but distinctly sparser. Labrum coplanar with anteclypeus at posterior quarter, inclined on anterior 3/4; finely, abundantly punctate; with long golden setae directed forward, and fringe of short golden setae on anterior margin. Distance between upper eye lobes 0.69 times length of scape; in frontal view, distance between lower eye lobes 1.46 times length of scape. Antennae 0.8 times elytral length, reaching middle of elytra; with greenish-brown pubescence on basal segments, gradually yellowish-brown toward apex; scape, pedicel, antennomere III and basal third of antennomere IV with short, thick, abundant white setae (slightly denser on inferior surface of sides); pedicel and antennomeres III–IX with long, semi-erect brownish setae ventrally (distinctly more abundant in III, gradually sparser in remaining antennomeres). Antennal formula (ratio) based on length of antennomere III: scape = 0.65; pedicel = 0.17; IV = 0.58; V = 0.45; VI = 0.42; VII = 0.38; VIII = 0.37; IX = 0.35; X = 0.33; XI = 0.38.

Thorax. Prothorax gradually widened from anterolateral angles to about midlength, parallel-sided toward posterolateral angles, slightly wider posteriorly than central length. Pronotum with anterior margin convex and posterior margin straight; coarsely, sparsely punctate except anterior and posterior areas with punctures sparser; sides with dense yellow pubescence (more whitish on its inner margin); wide central area with yellowish-brown pubescence not obscuring integument, except light yellowish-brown macula on center of posterior half; entire surface with short, thick white setae interspersed, forming small spot centrally on posterior margin. Sides of prothorax coarsely, sparsely punctate; with dense yellow pubescence close to pronotum, yellowish-brown, distinctly sparser on remaining surface (slightly denser close to prosternum); superior half with short, thick white setae interspersed. Prosternum and prosternal process with yellowish-white pubescence not obscuring integument (more whitish depending on light intensity). Mesoventrite with irregular light yellowish-brown pubescent macula laterally and pubescent band of same color close to mesoventral process; central area with yellowish-white pubescent band; remaining surface with sparser light yellowish-white pubescence (notably shorter and sparser in some areas). Anterior area of mesoventral process abruptly elevated; dorsal surface moderately flat centrally, inclined laterally; sides gradually narrowed toward apex; posterior margin distinctly emarginate; with sparse yellowish-white pubescence laterally, nearly glabrous on centrodorsal surface. Mesanepisternum with moderately dense yellowish-brown pubescence with small white pubescent tufts interspersed. Mesepimeron with spare yellowish-brown pubescence. Metanepisternum and sides of metaventrite coarsely punctate, with dense yellowish-brown pubescence (not obscuring punctures) with small, white pubescent tufts interspersed; remaining surface of metaventrite smooth, with sparse yellowish-brown pubescence with short white setae interspersed. Scutellum with sparse yellowish-brown pubescence, with abundant, short white setae interspersed (white setae forming fringe on sides of posterior margin).

Elytra. Coarsely, sparsely punctate on basal half, gradually finer, sparser toward apex; apex individually rounded. Pubescence as follows: dense yellowish pubescent band laterally on basal third, gradually light yellowish-brown toward middle; narrow pubescent band, composed of small circular white pubescent spots (both elytra together form a U-shaped fascia), separate lateral yellow pubescent area from central darker brown, sparsely pubescent area, the narrow fascia ending before suture; area enclosed by U-shaped white band with yellowish-brown pubescence partially obscuring integument (not obscuring punctures), with short white setae interspersed (forming very small tufts in some areas), distinctly shorter and sparser laterally close to white band; distal half of elytra with scattered white pubescent tufts, most are linearly aligned and a moderately large white pubescent spot on side of posterior half; with almost semicircular, white pubescent band on distal sixth, this same area with yellowish-brown pubescence partially obscuring integument; distal sixth with dark pubescence not obscuring integument, except area along suture with scattered sparse, short white setae.

Legs. Femora with yellowish-brown pubescence not obscuring integument, with short white setae interspersed (forming small tufts on some areas). Tibiae with pubescence as on femora, except yellow pubescence ventrally on distal third of meso- and metatibiae; dorsal surface of mesotibiae just after midlength slightly elevated, then concave, with row of thick, erect dark setae along concave area; apex of meso- and metatibiae about 2.5 times wider than basal area; apex of all tibiae with nearly golden fringe of thick setae. Dorsal surface of tarsomeres with grayish-white pubescence.

Abdomen. Ventrites with yellowish-brown pubescence (slightly yellower centrally on I–II), not obscuring integument, with short white setae interspersed (forming small tufts on some areas), except distal margin of I–IV with fringe of yellow pubescence, and sides of II–V with large, subcircular glabrous spot (smaller in V); ventrite V gradually depressed centrally; apex of ventrite V truncate, slightly emarginate centrally.

Dimensions (mm). Total length 11.40; prothoracic length 2.45; anterior prothoracic width 2.20; posterior prothoracic width 2.65; humeral width 3.50; elytral length 8.40.

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

Remarks. Adetus monteverdensis sp. nov. is similar to A. analis (Haldeman, 1847) ( Fig. 33–36 ), and A. basalis Martins and Galileo, 2010 , but differs as follows: elytra with a narrow white, marginal band encompassing the large central, and basal, dark fascia ( Fig. 29 ), completely lacking in both A. analis ( Fig. 34 ) and A. basalis ; meso- and metafemora more distinctly clavate with basal area narrower ( Fig. 30 ) in A. monteverdensis , not distinctly clavate and basal area wider in A. analis ( Fig. 35 ) and A. basalis ; ventral pubescence sparse with a shining, glabrous integument centrally ( Fig. 30 ), ventral pubescence moderately dense, integument not glabrous centrally in either A. analis ( Fig. 35 ) or A. basalis .

Etymology. This species is named for Monteverde, Costa Rica, the type locality.

Figures

Figures 29–36. Adetus spp. 29–32) Adetus monteverdensis sp. nov., holotype male: 29) Dorsal habitus. 30) Ventral habitus. 31) Lateral habitus. 32) Head frontal view. 33–36) Adetus analis, male: 33) Head, frontal view. 34) Dorsal habitus. 35) Ventral habitus. 36) Lateral habitus.