Pseudosparna swifti, Santos-Silva & Monné, 2023

Santos-Silva, Antonio & Monné, Miguel A., 2023, Description of three new species and one new genus in American Acanthocinini (Coleoptera, Cerambycidae), Zootaxa 5263 (2), pp. 273-284 : 274-276

Pseudosparna swifti sp. nov.

( Figs 1–7 )

Description. Holotype male ( Figs 1–5 ). Head capsule dark brown, except orangish-brown gulamentum.Postclypeus and anteclypeus brownish. Labrum dark orangish brown. Ventral mouthparts orangish brown, except palpomeres brown with yellowish brown apex (yellowish brown area distinctly longer on maxillary palpomere IV and labial palpomere III). Mandibles black, except orangish brown base of central region of outer surface. Scape orangish brown basally, reddish brown on remaining surface of basal third, blackish on remaining surface; pedicel brown; antennomere III dark brown basally, orangish on remaining basal 3/4, dark brown on apical quarter; antennomere IV orangish on basal 3/4, dark brown on apical quarter; antennomeres V–VII orangish on basal 4/5, dark brown on apical fifth; antennomeres VIII–IX brown (missing posterior region of X and entire XI in both antennae). Pronotum and sides of prothorax blackish, except dark reddish-brown area of posterior region of prothorax. Prosternum and prosternal process brown except transverse reddish brown band close to anterior margin of prosternum and central area of prosternal process. Mesoventrite mostly dark brown; mesoventral process dark brown basally, blackish on margins, reddish brown on remaining surface; mesanepisternum and mesepimeron brown, darker depending on light intensity. Metanepisternum brown basally, dark brown on remaining surface; metaventrite mostly dark brown. Scutellum dark brown, except blackish margins. Elytra mostly dark brown, slightly blackish on some areas. Femora yellowish brown on basal quarter, dark brown on remaining surface. Tibiae dark brown. Tarsi mostly brown, slightly lighter toward tarsomere V. Ventrite 1 reddish brown laterally, mostly dark brown centrally; ventrites 2–4 orangish laterally, mostly reddish brown centrally; ventrite 5 orangish on sides of basal third, mostly brown on remaining surface, except blackish apex.

Head. Frons densely, minutely punctate, sculpturing somewhat minutely rugose anterocentrally; with abundant yellowish-white pubescence not obscuring integument, pubescence slightly denser centrally; with one long, erect reddish brown seta on close to eyes. Vertex and area behind eyes with dense light yellowish-brown pubescence, slightly sparser behind lower eye lobes, except small glabrous central region between antennal tubercles, and irregular brownish macula on each side of posterior region of vertex. Genae with somewhat abundant light yellowish-brown pubescence not obscuring integument, except glabrous apex. Antennal tubercles with abundant light yellowishbrown pubescence basally, slightly sparser, brownish on remaining surface. Gulamentum smooth, glabrous; intermaxillary process with yellowish pubescence not obscuring integument. Wide central area of postclypeus with sparse yellowish-white pubescence, and one long, erect black seta on each side. Sides of postclypeus glabrous. Labrum with sparse yellowish-white pubescence on posterior 2/3, glabrous on posterior third, except fringe of yellowish-brown setae on anterior margin; posterior third with sparse, long, erect black setae interspersed; remaining surface of posterior 2/3 with a few long, erect yellowish setae interspersed. Distance between upper eye lobes 0.29 times distance between outer margins of eyes; in frontal view, distance between lower eye lobes 0.60 times distance between outer margins of eyes. Antennae 1.7 times elytral length (from base of scape to apex of antennomere IX), reaching elytral apex at basal sixth of antennomere VI. Scape pedunculate-clavate, distinctly surpassing base of elytra; with sparse yellowish pubescence on light area and abundant brown pubescence with yellowish-white pubescence interspersed on dark area, brown pubescence denser and bristly on apical third of ventral surface; with somewhat abundant, long, erect blackish setae ventrally. Antennomeres III–VII with somewhat sparse yellowish pubescence on light area, pubescence mostly brown on dark apical area; with sparse long, erect blackish setae ventrally, slightly more abundant on III, and a few short, decumbent blackish setae dorsally. Antennomeres VIII–IX mostly with brown pubescence with somewhat abundant whitish setae interspersed; with short, thick black setae apically. Antennal formula based on length of antennomere III: scape = 1.31; pedicel = 0.10; IV = 0.93; V = 0.74; VI = 0.69; VII = 0.64; VIII = 0.67; IX = 0.68.

Thorax. Prothorax wider than long; anterior and posterior constrictions well-marked; sides rounded, slightly widened from basal constriction to a little before middle, slightly divergent from this point to lateral tubercles, then distinctly narrowed toward posterolateral angles; lateral tubercles located on posterior fifth, small, as a continuation of the margin, with acute apex slightly directed backward. Pronotum with arched row of coarse punctures posteriorly; remaining surface abundantly, very finely punctate; central region with wide, longitudinal brown pubescent band; sides with dense light yellowish-brown pubescence. Sides of prothorax with abundant, mostly brown pubescence centrally, light somewhat abundant yellowish-brown pubescence anteriorly, except glabrous anterior sulcus, and sparse straw-colored pubescence posteriorly. Prosternum with somewhat abundant yellowish-white pubescence not obscuring integument, except glabrous anterior sulcus. Prosternal process with pubescence as on prosternum; distinctly narrowed centrally, with narrowest area 0.08 times procoxal width. Mesoventrite with somewhat abundant yellowish-white pubescence not obscuring integument centrally, with denser brownish pubescence on laterosuperior region, and dense yellowish-white pubescence on lateroinferior region. Mesanepisternum, mesepimeron with somewhat abundant brownish pubescence not obscuring integument. Mesoventral process gradually narrowed toward apex; apical margin emarginate; apex 0.14 times mesocoxal width. Metanepisternum with abundant brown pubescence partially obscuring integument. Metaventrite with abundant yellowish pubescence not obscuring integument. Scutellum with abundant brownish pubescence not obscuring integument, except yellowish-brown pubescence on posterior margin. Elytra. Abundantly, coarsely punctate on anterior half, punctures finer and sparser on posterior half, especially on posterior third; with wide, longitudinal yellowish-brown pubescent band dorsally, slightly more close to sides than suture, from base to near apex; with narrow yellowish-brown pubescent band close to suture on anterior third, gradually narrower and more yellowish-white toward its apex; remaining surface with abundant brown pubescence partially obscuring integument; with sparse, long, erect dark-brown setae interspersed throughout; apex obliquely truncate, with spiniform outer angle and rounded sutural angle. Legs. Profemora with abundant yellowish pubescence not obscuring integument; meso- and metafemora with abundant not obscuring integument, pubescence yellowish on basal half, brownish on posterior half. Protibiae with somewhat abundant brownish pubescence not obscuring integument, except apical half of ventral surface with dense, bristly yellowishbrown pubescence. Meso- and metatibiae with somewhat abundant brownish pubescence not obscuring integument, except apical third of ventral surface with denser, slightly bristly yellowish-brown pubescence, and apical third of dorsal surface with abundant, short, erect dark-brown setae, erect setae denser on mesotibiae; metatibiae with sparse, erect, thick black setae interspersed. Metatarsomere I almost twice as long as II–III together.

Abdomen. Ventrites with abundant yellowish pubescence not obscuring integument, pubescence whiter centrally on ventrite 5. Apex of ventrite 5 concave.

Variation in the paratype ( Figs 6–7 ). Ventral surface of mesothorax and abdomen mostly dark brown; ventral surface of metathorax mostly blackish; elytra dark reddish brown basally and laterally, mostly blackish on remaining surface; sides of pronotum with straw-colored pubescence; and longitudinal pubescent bands on elytra straw-colored.

Dimensions (mm) (holotype male/ paratype male). Total length, 8.00/6.30; prothoracic length, 1.05/0.85; anterior prothoracic width, 1.00/0.75; posterior prothoracic width, 1.15/0.90; maximum prothoracic width, 1.40/1.10; humeral width, 1.65/1.25; elytral length, 6.15/4.80.

Type material. Holotype male from COSTA RICA, Cartago: Turrialba , “Slg. Schild,” 800 m, IX.1928, F. Nevermann leg. ( MZSP) . Paratype male, same data as holotype, except no date indicated ( MZSP) .

Etymology. The species is dedicated to Ian Swift for his valuable contribution to the knowledge of Central American Cerambycidae .

Remarks. Pseudosparna swifti sp. nov. is similar to P. dimitrisi Nearns, Swift & Santos-Silva, 2023 (see photographs in original description and on Bezark 2023), but differs as follows: scape distinctly pedunculate-clavate; basal 3/4 of the antennomere III mostly brownish; and pubescence on sides of the pronotum light yellowish-brown. In males of P. dimitrisi , the scape is gradually widened from base to apex, and the posterior half is much narrower, antennomere III entirely dark brown, and the pubescence on the sides of the pronotum is yellow. It differs from males of P. antonkozlovi Santos-Silva & Nascimento, 2019 , P. luteolineata Mermudes & Monné, 2009 , and P. boliviana Monné & Monné, 2011 (see photographs of these species in original descriptions and on Bezark 2023), especially by the scape pedunculate-clavate (gradually widened from base to apex in these species).

Figures

FIGURES 1–7. Pseudosparna swifti sp. nov. 1–5) Holotype male: 1) Dorsal habitus; 2) Ventral habitus; 3) Lateral habitus; 4) Head, frontal view; 5) Prosternal and mesoventral processes. 6–7) Paratype male: 6) Dorsal habitus; 7) Ventral habitus.