Eburodacrys pilicornis Fisher, 1944

Santos-Silva, Antonio, Botero, Juan Pablo & Flechtmann, Carlos Alberto Hector, 2023, A new species and taxonomical and geographical notes on Neotropical Cerambycidae (Coleoptera), Papéis Avulsos de Zoologia 63, pp. 1-14 : 2-4

Eburodacrys pilicornis Fisher, 1944 ( Fig. 1 )

Eburodacrys pilicornis Fisher, 1944: 5 .

Redescription: Female from Brazil ( Figs. 1 A-1E): Head capsule dark orangish brown, irregularly lighter ventrally; ventral mouthparts brownish; antennae orangish brown; basal ⅔ of mandibles dark orangish brown, more brownish on margins, and apical third blackish. Prothorax mostly yellowish brown, lighter on anterior third and central area of prosternum and prosternal process,dark orangish brown on sides o posterior ⅔ of prosternum and sides of prosternal process, dark brown on anterolateral gibbosities of pronotum, reddish brown on posterocentral gibbosity, anterocentral and posterocentral regions of pronotum, and brownish on center of sides of prothorax. Ventral surface of meso- and metathorax dark orangish brown laterally, mostly yellowish brown centrally. Elytra mostly orangish brown on anterior ⅔, pale on posterior third; with three subelliptical eburneous maculae dorsally, one centrally on base, one slightly oblique centrally, another smaller on posterior third, located more laterally; eburneous maculae partially surrounded with narrow reddish brown band; each elytron with five pale yellow costae, one between scutellum and basal eburneous maculae, gradually inclined toward suture, disappearing after middle, one from apex of basal eburneous macula to apex, interrupted by central eburneous macula, one from base to near apex, interrupted by last eburneous macula, one laterally, from humerus to near apex, fused with apex of outermost dorsal band, another on epipleural margin, from base to apex. Femora orangish brown, except brownish apex and blackish spine of meso- and metafemora; tibiae orangish brown; tarsi dark reddish brown. Ventrites dark orangish brown laterally, mostly yellowish brown centrally.

Head: Frons somewhat finely rugose-punctate, except smooth anterocentral region; with short, sparse, decumbent white setae, absent on smooth area. Area between antennal tubercles coarsely, sparsely punctate; with short, sparse, decumbent white setae; central area between antennal tubercles and middle of upper eye lobes smooth; area between antennal tubercles and anterior margin of upper eye lobes, coarsely, sparsely punctate laterally; remaining surface of vertex finely, somewhat abundantly punctate, punctures denser, coarser on sides after eyes; vertex with short, decumbent, somewhat sparse white setae, absent on smooth area, sparser on posterocentral region. Area behind eyes somewhat coarsely, densely punctate, transversely striate behind lower eye lobe, except smooth area close to superior region of lower eye lobe; with short, sparse yellowish-white setae behind upper eye lobe, setae distinctly shorter than on vertex, almost glabrous on remaining surface, except short yellowish setae close to inferior margin of lower eye lobe. Genae minutely, abundantly punctate, except smooth apex; with yellowish-white pubescence not obscuring integument, except glabrous smooth area. Area between antenna and eye with dense grayish-white pubescence, gradually whiter toward lower eye lobe. Wide central area of postclypeus with somewhat long white setae directed forward; sides glabrous. Labrum with long yellowish-brown setae posteriorly, glabrous anteriorly. Ventral surface of head smooth, glabrous on posterior half, somewhat finely and abundantly punctate, with long, erect white setae on anterior half, setae shorter, denser, decumbent close to eyes. Antennal tubercles not spiniform apically. Distance between upper eye lobes 0.30 times distance between outer margins of eyes; in frontal view, distance between lower eye lobes 0.57 times distance between outer margins of eyes. Antennae 1.5 times elytral length, reaching elytral apex at apex of antennomere X. Scape moderately narrow, slightly widened toward apex; dorsal sulcus slightly marked; coarsely, abundantly punctate laterally and anterodorsal third, punctures sparser dorsally toward smooth apex, almost smooth ventrally; with short, sparse white setae on punctate region, and long, erect yellowish setae interspersed laterally, especially on posterior third. Pedicel finely punctate on basal half of dorsal and lateral surfaces, and posterior half of ventral surface, smooth remaining surface; with short, sparse, decumbent white setae dorsally and laterally, absent ventrally, and long, erect yellowish setae interspersed on posterior half of sides and ventral surface. Antennomere III finely, sparsely punctate, punctures denser on posterior half of outer side; longitudinally sulcate dorsally and ventrally; with minute, sparse white setae dorsally, short, decumbent, abundant white setae on basal half of outer side, shorter, yellowish on posterior half of outer side, long, decumbent yellowish setae ventrally, and distinct long, erect, abundant yellowish setae on outer margin of ventral surface. Antennomeres IV-V longitudinally carinate dorsally, longitudinally sulcate ventrally; with minute, sparse white setae dorsally, minute, abundant yellowish setae on outer surface, setae on remaining surface as on III. Antennomeres VI-XI with short, abundant yellowish-white pubescence, long, erect, yellowish setae on outer margin of ventral surface, erect setae gradually shorter and sparser toward XI; antennomere XI with distinct constriction after middle. Antennomeres III-X with a few long, erect yellowish setae on dorsal apex. Antennal formula based on length of antennomere III: scape = 0.69; pedicel = 0.12; IV = 0.84; V = 0.84; VI = 0.78; VII = 0.74; VIII = 0.62; IX = 0.55; X = 0.48; XI = 0.64.

Thorax: Prothorax wider than long (including lateral tubercles); lateral tubercles conical, moderately large, located centrally. Pronotum with three distinct tubercles, one on each side of anterior half, slightly elongated, with rounded apex, another on center of posterior half, distinctly less elevated than anterolateral ones; coarsely, somewhat abundantly punctate, punctures denser, forming slightly rugose area close to posterior margin, except smooth tubercles; with short, decumbent, sparse white setae, more abundant on sides of posterior half, absent on tubercles and almost absent centrally; with a few long, erect whitish setae interspersed. Sides of prothorax coarsely, somewhat rugose-punctate; with moderately abundant short white setae, longer than on pronotum, and long, erect setae of same color interspersed. Posterior half of prosternum with sculpturing and setae as on sides of prothorax; anterior half slightly striate-punctate (striae more distinct close to posterior half), and with short, both decumbent and erect white setae. Prosternal process with abundant white setae not obscuring integument; narrowest area 0.3 times procoxal width. Sides of ventral surface of meso- and metathorax with abundant, decumbent white setae not obscuring integument; central area with sparse, decumbent white setae, except glabrous are close to metathoracic discrimen. Scutellum with somewhat sparse, decumbent white setae. Elytra: Coarsely, shallowly, abundant punctate on anterior third and sides of central third, distinctly finer, sparer on remaining surface, especially close to apex; apex almost obliquely truncate; with short, sparse white setae, absent on eburneous maculae, and long, erect, sparse setae of same color interspersed, almost absent on eburneous maculae. Legs: Profemora with a few long, erect yellowish setae dorsally and laterally, short, decumbent, sparse white setae ventrally, more abundant basally, and long, erect setae of same color interspersed basally; meso- and metafemora with short, decumbent, sparse whitish setae, and moderately long, bristly yellowish-brown setae interspersed, more abundant ventrally; inner spine of meso- and metatibiae long. Tibiae gradually widened toward apex, more distinctly in metatibiae; with short, sparse yellowish-brown setae, more abundant on posterior third of ventral surface, and long, erect setae of same color interspersed.

Dimensions (mm): Total length, 17.95; prothoracic length, 3.25; anterior prothoracic width, 3.15; posterior prothoracic width, 3.45; maximum prothoracic width, 4.15; humeral width, 4.70; elytral length, 12.10.

Male: Similar to females. Differs by longer antennae (only one male without antennomeres IX-XI measured), 2.0 times elytral length (from base of scape to apex of antennomere VIII), reaching elytral apex at posterior fifth of antennomere VI, and by scape wider and more distinctly sulcate dorsally.

Material examined: VENEZUELA, Distrito Capital (new state record): Caracas , 1 ♀, 03.VI.1959, Bordon leg. ( MZSP). Aragua: El Limon, 450 m, 1 ♀, 31.V.1964, C.J. Rosales leg. ( MZSP) ; Cagua , 1 ♂, 20.XI.1960, Bordon leg. ( MZSP) . COLOMBIA, Cundinamarca (new department record): Guaduas, Rancho las Vegas , 05°03′42″N, 74°35′53″W, 1,000 m, 1 ♀, 09-16.V.2016, V. Sinyaev & C. Pinilla leg. ( MZSP). Bolívar: San Jacinto (San Cristóbal, 80 m, 09°53′16.48″N, 75°94′44.09″W), 1 ♀, 02-05.XII.2019, J.P. Botero, A.F. García, D. Ahumada & H. Vides, leg. ( MPUJ). Santander: Barichara, 06°38′20″N, 73°13′38″W, 1,294 m, 30.III.1999, 1 ♂, J. Afanador & J. Sánchez leg. ( UNAB) . BRAZIL (new country record), Mato Grosso do Sul: Selvíria, UNESP Farm , hand collected, 1 ♀, 06.IV.2019, J. Milan leg. ( MEFEIS) .

Remarks: Currently, E.pilicornis is known from Nicaragua, Costa Rica, Panama, Colombia (Huila, Santander, Bolívar), and Venezuela (Monagas, Anzoátegui, Aragua, Miranda, Guárico) ( Monné, 2022a; Tavakilian & Chevillotte, 2022).

All specimens from Venezuela and Colombia that were examined have the apex of the antennal tubercles distinctly acute (somewhat spiniform). The specimen from Brazil has the apex of the antennal tubercles flattened. However, as no other morphological differences were found, we believe that this is just an extreme variation. In the same way, the specimen from Brazil has a very distinct longitudinal pale-yellow band on the curvature of the elytra ( Fig. 1C ).The specimens from Venezuela and the two males from Colombia ( Figs. 1 F-1H) do not even have a trace of that band. However, the other male from Colombia has that band slightly distinct. Therefore, we believe that the presence of that band is another feature variable in the species.

Figures

Figure 1. Eburodacrys pilicornis Fisher,1944. (A-E) Female from Brazil:(A) Dorsal habitus;(B)Ventral habitus (C) Lateral habitus;(D) Head, frontal view; (E) Elytral apex.(F-H) Female from Colombia (Cundinamarca):(F) Head,frontalview;(G) Dorsal habitus;(H) Lateral habitus.