Pseudosparna triangulata, Nascimento & Mcclarin, 2018

Nascimento, Francisco E. De L. & Mcclarin, Jim, 2018, New species of Acanthocinini Blanchard, 1845 (Coleoptera, Cerambycidae, Lamiinae) from Ecuador and notes on Parabaryssinus lineaticollis (Gounelle, 1910), Zootaxa 4387 (2), pp. 385-393 : 387-389

Pseudosparna triangulata , sp. nov.

( Figs 6–10 )

Holotype male. Integument mostly dark brown; sides of head, from area behind upper eye lobes to frontal region below lower eye lobes, prothorax (except dark brown prosternal process), mesoventrite (except dark brown mesoventral process), and metaventrite reddish brown; antennomere IV with anterior half yellowish white except dark brown basal ring; clypeus, margin of labrum, and base of femora yellowish. Pronotum with a band of brownish pubescence, anteriorly widened in an inverted V-shape.

Head: Frons finely punctate, with abundant yellowish pubescence not obscuring integument. Median groove extending to vertex, between upper eye lobes. Antennal tubercles slightly and gradually elevated; surface with brownish pubescence. Gulamentum glabrous. Upper eye lobes with four rows of ommatidia; distance between upper eye lobes about five times width of an upper eye lobe. Antennae as long as 1.5 times body length, reaching elytral apex at mid-length of antennomere VII; with abundant dark brown pubescence not obscuring integument, and sparse whitish setae, more abundant in last antennomere; internal side with elongate and sparse setae, as long as respective antennomere diameter. Antennal formula (ratio) based on length of antennomere III: scape = 1.15; pedicel = 0.08; IV = 0.82; V = 0.70; VI = 0.68; VII = 0.62; VIII = 0.65; IX = 0.63; X = 0.63; XI = 0.50.

Thorax: Prothorax 1.5 times wider than long; parallel-sided; sides with obtuse tubercle at posterior half; disk flattened, deeply punctate; punctures sparsely distributed on disc and close to each other at posterior margin; pronotum with large brownish V-shaped pubescent macula centrally, pale yellow laterally. Prosternum, meso- and metaventrite with short and abundant yellowish pubescence, not obscuring integument. Prosternal process narrowed, about as wide as one-fifth of procoxal cavity, closed behind; mesoventral process with one-third of diameter of a mesocoxal cavity, closed laterally. Elytra 5.1 times length of prothorax; parallel-sided; apex transversely truncate, with outer angle triangularly projected; sutural angle rounded; surface deeply and homogeneously punctate; interstices distance about double of diameter of a puncture; with short and abundant yellowish brown pubescence, nearly obscuring integument, except narrow pale yellow pubescent band along suture. Legs: Coxae and femora with short and abundant yellowish pubescence not obscuring integument. Femora pedunculate and clavate. Tibiae slightly widened toward apex; with short and abundant yellowish pubescence; with thickened, semi-erect black setae, more abundant on apical half.

Abdomen: With short and abundant yellowish pubescence not obscuring integument; ventrites I–IV slightly decreasing in length; V longer, 1.6 times length of IV, apex truncated.

Dimensions (in mm), Holotype male. Total length, 6.6; prothorax length, 1.0; greatest width of prothorax, 1.3; anterior width of prothorax, 1.2; posterior width of prothorax, 1.1; humeral width, 0.7; elytral length 5.0.

Type material. Holotype male from ECUADOR, Napo: Cosanga , 2100m, 2015-VII-25 J. McClarin leg. ( QCAZ).

Etymology. The name refers to the V-shaped pubescent macula of pronotum.

Remarks. Currently, the genus Pseudosparna Mermudes & Monné, 2009 , comprises eight species. The genus was originally proposed for four species: P. aragua Mermudes & Monné, 2009 ( Venezuela) ; P. amoena Mermudes & Monné, 2009 ( Venezuela) ; P. flaviceps ( Bates, 1863) ( French Guiana, Brazil); and the type species P.

luteolineata Mermudes & Monné, 2009 ( Ecuador) . After its description, Monné & Monné (2011) described P. boliviana from Bolivia. The same authors, in Monné & Monné (2014), proposed a key to its species and described P. tucurui and P. pichincha , respectively from Brazil and Ecuador. Recently, Dalens & Touroult (2015) described P. ubirajara from French Guiana.

Pseudosparna triangulata sp. nov. resembles P. flaviceps and P. luteolineata by the central area of the pronotum with dark pubescence and yellowish pubescence laterally. The new species differs from P. luteolineata especially by its stouter body, antennomere IV about two-thirds the length of III, and by the elytra without longitudinal yellowish pubescent bands on sides. Pseudosparna luteolineata has a remarkably slender body, the antennomere IV is as long as the III, and the elytra have a longitudinal, yellowish pubescent band on the sides from the humeral area to posterior fourth. Pseudosparna triangulata sp. nov. differs from P. flaviceps especially by its prothorax with obtuse tubercle at posterior half, prothorax narrower than humeral width, and by the humerus without longitudinal yellowish pubescent band. In P. flaviceps , the prothorax has acuminate tubercle at sides, the prothorax is as wide as the humeral width, and the humerus has a longitudinal yellowish pubescent band.

Figures

FIGURES 6–10. Pseudosparna triangulata sp. nov., holotype, male: 6, dorsal view; 7, ventral view; 8, lateral view; 9, frontal view; 10, pronotum.