Pteroplatus pallidicolor Martins & Galileo, 2013

Botero, Juan Pablo, Santos-Silva, Antonio & Bezark, Larry G., 2019, Revision of the genus Pteroplatus Buquet, 1840 (Coleoptera, Cerambycidae, Cerambycinae) and taxonomic notes in Pteroplatini, Zootaxa 4658 (1), pp. 69-100 : 84-86

Pteroplatus pallidicolor Martins & Galileo, 2013

( Figures 43–47 )

Pteroplatus pallidicolor Martins & Galileo, 2013: 575 ; Monné & Chaboo, 2015: 63 (distr.); Monné et al., 2017: 32 (holotype); Monné, 2018: 672 (cat.).

Redescription. Male. Head dark brown, almost black except posterior area, gulamentum dark reddish-brown; mentum and cardo yellowish-brown; palpi dark brown, almost black, except yellowish-brown distal area of each palpomere; antennae dark brown, slightly lighter from antennomere VII. Prothorax mostly orangish-brown except: anterior area of pronotum narrowly dark brown; pronotum with irregular yellowish maculae; pronotum with one slightly oblique, subelliptical black macula on each side of posterior third; sides of prothorax with brownish band close to anterior margin, gradually darker and wider toward prosternum; sides of prothorax with brownish band close to posterior margin, irregular brownish macula close to procoxal cavity, and irregular yellowish maculae; prosternum with wide black band close to anterior margin and procoxal cavities; prosternal process black; ventral side of meso- and metathorax, abdominal ventrites, and legs dark brown (femora slightly lighter). Scutellum almost black, with slight violaceous reflections. Elytra yellow except brownish punctures, and irregular, transverse whitish band placed close to midlength at posterior half, from suture to epipleural margin.

Head. Frons with moderately elevated central plate, carina-shaped toward vertex, distinctly widened toward clypeus, nearly rounded anteriorly; transversely depressed on each side of central plate (more distinct laterally); finely, abundantly punctate except smooth central plate; with short, moderately abundant, partially bristly yellowish-brown setae, interspersed with long, erect of same color. Area between antennal tubercles and upper eye lobes not carinate centrally; finely, abundantly punctate; with bristly yellowish-brown setae (more abundant between antennal tubercles), interspersed with long, erect setae of same color (more abundant between antennal tubercles). Remaining surface of vertex with punctures slightly coarser than on remaining dorsal surface; with minute, decumbent, sparse yellowish-brown setae. Area behind upper eye lobes with sculpturing and setae as on posterior area of vertex (punctures and setae slightly denser); area behind lower eye lobes smooth close to upper eye lobes, moderately finely punctate on remaining surface (punctures denser toward ventral side, smoother toward prothoracic margin); with long, erect yellowish-brown setae close to eye (longer and denser toward ventral side), smooth on remaining surface. Antennal tubercles with sculpturing and setae as on frons except smooth and glabrous distal area. Postclypeus finely, densely punctate on wide central area, smooth laterally; with short, moderately abundant, bristly yellowish-brown setae interspersed with long, erect yellowish setae on sides of wide central area. Labrum coplanar with anteclypeus at posterior third, inclined at anterior 2/3; glabrous close to anteclypeus, with both, short and long yellowish-brown setae on remaining surface (setae longer laterally). Genae finely, abundantly punctate close to eye, smooth toward apex; with short, decumbent yellowish-brown setae interspersed with long, erect setae of same color, except glabrous distal area. Gulamentum smooth, glabrous close to prothorax, somewhat depressed, striate-punctate, with both, short and long, erect, moderately abundant yellowish-brown setae on anterior area. Distance between upper eye lobes 0.57 times length of scape; in frontal view, distance between lower eye lobes 1.05 times length of scape. Antennae (missing antennomere XI in left antenna, and VIII–XI in right antenna) 1.15 times elytral length, reaching about posterior sixth of elytra. Antennomeres III–V with tuft of moderately short setae in posterior half; antennomere VI with tuft of long setae on posterior 3/4. Antennal formula (ratio) based on length of antennomere III: scape = 1.16; pedicel = 0.34; IV = 0.96; V = 1.22; VI = 1.56; VII = 1.22; VIII = 1.00; IX = 0.90; X = 0.80.

Thorax. Prothorax with rounded tubercle centrally, constricted anteriorly and posteriorly; anterior margin slightly narrower than posterior one, but sides wider than posterior margin close to anterior constriction. Pronotum with one slightly oblique gibbosity on each side of posterior half; with slightly elevated central gibbosity (longitudinally sulcate) on posterior half followed by narrow carina to anterior margin; moderately shallowly, transversely, widely depressed on anterior half; with moderately coarse, shallow, slightly distinct punctures except smooth gibbosities; with short, sparse yellowish setae, slightly longer and more abundant anteriorly, interspersed with long, erect setae of same color, but nearly glabrous centrally. Sides of prothorax nearly glabrous posteriorly, with short, moderately abundant yellowish setae interspersed with long, erect setae of same color on remaining surface. Prosternum with both, short and long, erect, moderately abundant pale yellow setae on punctate area, nearly glabrous close to anterior margin. Ventral surface of mesothorax with short, decumbent yellowish-brown setae, slightly denser laterally. Metanepisternum with abundant, decumbent yellowish-brown setae interspersed with long, erect setae of same color. Metaventrite with setae as on metanepisternum laterally, slightly sparser toward central area. Scutellum with short, decumbent, sparse brownish setae. Elytra. Slightly widened from midlength; coarsely, shallowly, abundantly punctate on basal half, gradually finer toward apex; with short, erect, sparse yellowish setae, gradually brownish toward apex. Legs. Femora finely, abundantly punctate except nearly smooth basal 2/3 of profemora; with short, decumbent brownish setae not obscuring integument, interspersed with long, erect setae of same color (glabrous on smooth area of profemora). Tibiae finely, abundantly punctate; with decumbent brownish setae interspersed with long, erect dark setae.

Abdomen. Ventrites with decumbent, moderately abundant yellowish-brown setae interspersed with long, erect setae of same color; apex of ventrite V truncate.

Dimensions (mm), holotype male. Total length, 13.60; prothoracic length, 2.05; anterior prothoracic width, 1.95; posterior prothoracic width, 2.00; maximum prothoracic width, 2.50; humeral width, 3.45; elytral length, 10.15. According to Martins & Galileo (2013) (in mm): “Total length, 13.0; prothorax length, 2.0, greatest width of prothorax, 2.5; elytron length, 10.0; humeral width, 3.4.”

Material examined. PERU, Cajamarca: Jaen , 8.II.1964 [wrongly recorded as 8.X. 1964 in the original description], holotype male, Korytkowski col. ( MZSP) .

Distribution. Pteroplatus pallidicolor remains known only by the holotype from Peru.

Remarks. According to Martins & Galileo (2013): “ Pteroplatus pallidicolor sp. nov is distinguished from P. nigriventris Brême, 1845 , described from Colombia, by the two black spots close to the base of the pronotum, and by the black scutellum. In P. nigriventris , the pronotum has three longitudinal black stripes, one central and one on each side and scutellum yellow.” However, P. pallidicolor is noticeably different from the holotype of P. nigriventris in the elytral shape and sculpturing. Furthermore, the holotype of the latter has a single longitudinal black band, and not three. Pteroplatus pallidicolor is very similar to P. anchora , practically only differing by the elytra not being reticulate. The anterior area of the prothorax is wider than the posterior margin in the holotype of P. pallidicolor . However, this kind of variation was observed in P. quadriscopulatus and, probably, may also occur in specimens of P. anchora . Accordingly, it cannot be used as a differential feature.

Figures

FIGURES 43–47. Pteroplatus pallidicolor, holotype male: 43) Dorsal habitus; 44) Ventral habitus; 45) Lateral habitus; 46) Head and pronotum; 47) Head, frontal view.