Nesanoplium spinosum, Botero & Bezark & Santos-Silva, 2020

Botero, Juan Pablo, Bezark, Larry G. & Santos-Silva, Antonio, 2020, A new genus, new species and taxonomic notes on American Cerambycinae (Coleoptera, Cerambycidae), Zootaxa 4758 (1), pp. 157-175 : 158-159

Nesanoplium spinosum sp. nov.

( Figs. 1–5 )

Description. Female. Dorsal surface of head mostly dark brown, darker reddish-brown on postclypeus, and most of surface of antennal tubercles; area behind eyes dark brown superiorly, gradually light reddish-brown toward ventral surface; ventral surface of head and genae orangish-brown; anteclypeus and labrum orangish-brown, with irregular darker areas; mandibles orangish-brown on basal 3/4 (darker on margins), black on distal quarter. Scape orangishbrown on wide central area, brownish anteriorly and posteriorly; pedicel mostly brownish; antennae reddish-brown on basal antennomeres, irregularly darkened on some areas, gradually orangish-brown toward distal antennomeres. Pronotum dark brown, except dark reddish-brown anterior margin, and reddish-brown posterior margin. Sides of prothorax dark brown on wide superior area, gradually orangish-brown close to prosternum. Prosternum orangishbrown, reddish-brown on margins and most of prosternal process. Ventral surface of mesothorax reddish-brown, except yellowish-brown mesoventral process and area close to it (margins of mesoventral process reddish-brown). Metaventrite orangish-brown, except reddish-brown margins; metanepisternum reddish-brown. Scutellum orangish-brown centrally, with dark brown margins. Elytra reddish-brown on base (this area triangularly projected along suture), with light yellowish-brown wide area from this point to slightly before middle, then orangish-brown toward apex (slightly lighter close to apex). Femora pale yellow except dark brown apex. Tibiae dark reddish-brown basally, gradually pale yellow toward apex. Tarsi orangish-brown. Ventrite I yellowish on wide central area, orangish-brown laterally; ventrites II–IV mostly orangish-brown; ventrite V yellowish, irregularly maculated with orangish-brown areas. Yellowish-white setae whiter depending on light intensity.

Head. Frons coarsely, abundantly punctate (punctures oblong), with short, erect yellowish-white setae emerging from each puncture; with a few long, erect yellowish-brown setae laterally (yellower depending on light intensity). Area between antennal tubercles with sculpturing and setae as on frons, lacking long setae. Remaining surface of vertex coarsely, abundantly punctate (punctures rounded), except smooth central area between posterior margin of eyes and prothorax, and area close to prothorax confluently punctate (punctures oblong and transverse); with short yellowish-white seta emerging from nearly all punctures, and some long, erect yellowish setae emerging from others laterally. Area behind upper eye lobes with moderately coarsely, confluently punctate superiorly, smooth close to eye and coarsely, confluently punctate close to prothorax toward lower eye lobe; with sparse, erect, short yellowish-white setae on punctate area. Area behind lower eye lobes smooth, glabrous. Genae finely, sparsely punctate, except smooth apex; with moderately sparse yellowish-white pubescence close to eye, with long, erect yellowish-white setae interspersed toward ventral surface, glabrous on apex. Antennal tubercles coarsely, sparsely punctate except smooth apex (punctures shallower than on frons); with short, sparse yellowish-white setae. Gulamentum smooth, glabrous on posterior half, rugose-punctate, with short, erect, sparse yellowish-white setae, with long, erect setae of same color interspersed on anterior half. Postclypeus nearly smooth on wide central area close to frons, finely, abundantly punctate on wide central area close to anteclypeus, coarsely, abundantly punctate laterally near eyes, smooth on apex of sides; glabrous on smooth or nearly smooth areas, with yellowish-white pubescence on punctate areas (shorter on area close to anteclypeus); with one long erect seta on each side of wide central area. Labrum smooth close to anteclypeus, with long, erect yellowish-brown setae anteriorly. Distance between upper eye lobes 0.62 times length of scape (0.33 times distance between outer margins of eyes); in frontal view, distance between lower eye lobes 0.67 times length of scape (0.35 times distance between outer margins of eyes). Antennae 1.3 times elytral length, almost reaching elytral apex. Scape moderately finely and abundantly punctate, except smooth apex (this area wider on outer side); with short, decumbent, sparse yellowish-white pubescence, with a few long, erect yellowish-white setae interspersed throughout. Pedicel and antennomeres with yellowish pubescence not obscuring integument; antennomeres III–VI with long, erect yellowish setae ventrally, gradually sparser toward VI; antennomeres III–X with long, erect, sparse yellowish setae throughout on apex; antennomeres III–VII with spine at inner apex (gradually shorter toward VII); antennomere III–V flattened, slightly sulcate dorsally except on tumid apex (less so on IV–V); remaining antennomeres somewhat flattened dorsally; outer apex of antennomeres III–IV slightly rounded, unarmed; outer apex of antennomere V with minute spine (appearing to be dentate); outer apex of antennomeres V–X dentate. Antennal formula (ratio) based on length of antennomere III: scape = 0.77; pedicel = 0.19; IV = 0.61; V = 0.82; VI = 0.84; VII = 0.84; VIII = 0.68; IX = 0.61; X = 0.51; XI = 0.48. Length of apical spine of antennomeres compared with length of antennomere: III = 0.18; IV = 0.23; V = 0.16; VI = 0.14; VII = 0.14.

Thorax. Prothorax slightly longer than wide; sides uniformly rounded from anterior to posterior constriction. Pronotum coarsely, densely punctate (punctures becoming reticulate on some areas), except smooth anterior and posterior areas close to margins; with a few long, erect yellowish setae on sides of posterior half. Sides of prothorax with sculpturing and setae as on central area of pronotum, except smooth anterior and posterior areas close to margins (both widened toward prosternum, especially anterior one). Prosternum coarsely, moderately abundantly punctate on posterior 2/3 (punctures coarser than on pronotum), nearly smooth on anterior and posterior areas of anterior third, finely, abundantly punctate on central area of anterior third; with short yellowish-white setae emerging from nearly all punctures, and some long, erect yellowish-white setae emerging from others punctures on posterior 2/3, glabrous on smooth areas. Narrowest area of prosternal process 0.2 times width of procoxal cavity. Central area of mesoventrite with short, very sparse yellowish-white setae; sides with yellowish-white pubescence not obscuring integument; mesanepisternum and mesepimerum with abundant yellowish-white pubescence not obscuring integument; sides of mesoventral process with short, sparse yellowish-white setae, and central area with a few long, erect yellowish-white setae. Metaventrite coarsely, abundantly punctate laterally, gradually sparsely toward smooth central area; metanepisternum and sides of metaventrite with abundant yellowish-white pubescence not obscuring integument; remaining surface of metaventrite with both short and long, sparse yellowish-white setae, except glabrous central area. Scutellum with moderately sparse yellowish-white pubescence on dark area, nearly glabrous centrally. Elytra. Coarsely, abundantly punctate on anterior half, punctures gradually finer, sparser toward apex; with long, erect yellowish setae emerging from some punctures, longer and more abundant on posterior half; apex triangularly projected on outer and sutural angles (projection longer and slender on outer angle), concave between projections. Legs. Femora with short, decumbent, and long, erect yellowish-white setae, distinctly not obscuring integument. Tibiae with long, erect, moderately abundant yellowish-white setae, and denser, bristly setae of same color ventrally on posterior third.

Abdomen. Ventrites finely, sparsely punctate; with short, decumbent, sparse yellowish-white setae (distinctly sparser on wide central area of ventrite I), with long, erect setae of same color interspersed laterally, except smooth apex of I–IV; apex of ventrite V rounded.

Dimensions in mm. Total length, 10.95; prothoracic length (centrally), 2.25; anterior prothoracic width, 1.70; posterior prothoracic width, 1.80; widest prothoracic width, 2.25; humeral width, 2.60; elytral length, 7.40.

Type material. Holotype female from HONDURAS, Islas de la Bahia: Roatán Island (west), 1.I.1980, G.E. Bohart col. ( CASC, formerly LGBC).

Etymology. The specific epithet spinosum refers to the distinct spines on the basal antennal segments.

Remarks. Nesanoplium spinosum sp. nov. differs from N. puberulum ( Fleutiaux & Sallé, 1889) and N. dalensi Chalumeau & Touroult, 2005 , especially by basal antennomeres with a distinct spine on the inner apex. In these two species, the inner apex of the basal antennomeres is unarmed or, at most, with a spicule. Furthermore, according to Chemsak (1966) and Villiers (1980c) the antennomeres are carinate, while they are not so in N. spinosum . From N. dalensi , the new species also differs by the elytral apex being distinctly projected on both outer and sutural angles, while it is truncate and unarmed in N. dalensi .

Figures

FIGURES 1–5. Nesanoplium spinosum, holotype female: 1) Dorsal habitus; 2) Ventral habitus; 3) Lateral habitus; 4) Head, frontal view; 5) Antennomeres III–IV.