Piriana svachai, Santos-Silva & Galileo & Mcclarin, 2018

Santos-Silva, Antonio, Galileo, Maria Helena M. & Mcclarin, Jim, 2018, Division of the genera Sparna Thomson, 1864 and Carterica Pascoe, 1858 (Coleoptera, Cerambycidae, Lamiinae, Colobotheini) with description of six new genera and eight new species, Zootaxa 4407 (1), pp. 1-28 : 16-18

Piriana svachai sp. nov.

( Figs 40–43 )

Description. Female. Integument mostly dark brown, in some areas nearly black; frons (except wide dark brown area under antennal tubercles), genae (except dark brown distal area), entire central area of vertex, entire ventral surface of head, and mouthparts yellowish brown; basal 2/3 of antennomere IV yellowish brown, gradually darker brown on distal third; basal 3/4 of antennomeres V–VI yellowish brown, with distal quarter dark brown; basal third of antennomere VII yellowish brown, distal 2/3 brown; remaining antennomeres brown; pronotum with wide yellowish brown band on each side; central area of prosternum slightly reddish; pro- and mesocoxae dark reddish brown; peduncle of pro- and mesofemora yellowish; basal third of metafemora yellowish; elytra with basal half densely yellow pubescent except for central basal area, lateral margin and suture a much darker brown.

Head. Frons densely micropunctate; with short yellowish white pubescence not obscuring integument. Light area of vertex with yellow pubescent band, nearly obscuring integument, except nearly glabrous area close to prothoracic margin; remaining surface of vertex with yellowish brown pubescence not obscuring integument, shorter and finer than yellow pubescence. Area behind upper eye lobes with yellowish brown pubescence toward vertex, with yellowish white pubescence toward lower eye lobe; area behind upper eye lobes with yellowish white pubescence not obscuring integument, nearly glabrous close to prothorax. Genae with sculpture and pubescence as on frons, except glabrous, smooth distal dark area. Antennal tubercles densely micropunctate; with yellowish brown pubescence not obscuring integument. Distance between upper eye lobes 0.22 times length of scape; in frontal view, distance between lower eye lobes 0.39 times length of scape. Antennae 2.35 times elytral length (missing antennomere XI in left antenna, and antennomeres IX–XI in right antenna), reaching elytral apex at distal third of antennomere VI; scape densely, moderately finely asperate punctate, with sparse, suberect, thick dark setae ventrally; antennomeres III–IV with a few, erect, thick dark setae ventrally, especially in IV; antennal formula (ratio) based on length of antennomere III: scape = 1.56; pedicel = 0.15; IV = 1.05; V = 0.92; VI = 0.92; VII = 0.87; VIII = 0.95; IX = 1.00; X = 0.87.

Thorax. Prothorax 1.45 times wider than long; widest area ending in acute backward directed spine. Pronotum transversely sulcate near base; finely, sparsely punctate, in distal 3/4, punctures more abundant in basal quarter; with wide yellowish brown pubescent area centrally, not obscuring integument; with dense yellow pubescence obscuring integument (longer and thicker than central pubescence) laterally, except pubescence on narrow area between distal margin and lateral spine yellowish brown. Sides of prothorax with yellowish brown pubescence, not obscuring integument, more grayish white toward prosternum. Ventral surface of thorax with grayish white pubescence not obscuring integument Scutellum with yellowish brown pubescence not obscuring integument. Elytra. Coarsely, abundantly punctate on basal half, gradually finer, sparser toward apex; humeral carina distinct from base (less so in basal sixth) to about distal quarter; dorsally with two carinae, outermost distinct from base to near apex, innermost less distinct, especially basally, gradually disappearing after middle; apex sinuous, oblique, with rounded sutural angle; light area with yellow pubescence not obscuring integument; remaining surface with grayish white pubescence not obscuring integument, less distinct on basal third; with moderately long, suberect, thick dark setae throughout, slightly more abundant on distal quarter. Legs. Tibiae proportionally short, slightly widened toward apex. Metatarsomere I about as long as II–V together.

Abdomen. Ventrites with grayish white pubescence not obscuring integument.

Dimensions (in mm), holotype female. Total length, 5.50; prothoracic length, 0.90; basal prothoracic width, 1.00; distal prothoracic width, 0.85 (1.05 before constriction); greatest prothoracic width, 1.30; humeral width, 1.60; elytral length, 4.10.

Type material. Holotype female from BRAZIL, Rio Grande do Sul: Itaúba , 27.X.1999, Franceschini, Bonaldo & Silva col. ( MZSP).

Etymology. Named for Petr Svacha (Czech Academy of Sciences, Czech Republic) for his many contributions to our knowledge of the Cerambycidae .

Remarks. Piriana svachai sp. nov. is similar to P. pygmaea but differs as follows: scape wider, finely asperate punctate; elytral apex oblique, with sutural angle slightly projected. In P. pygmaea , the scape is slender and not asperate punctate, the elytral apex is not oblique, and the sutural angle is distinctly projected.

Figures

FIGURES36–43. 36–39, Piriana nearnsi, sp. nov., holotype female:36, dorsal habitus; 37, ventral habitus; 38, lateral habitus; 39, head, frontal view. 40–43, Piriana svachai, sp. nov., holotype female: 40, dorsal habitus; 41, ventral habitus; 42, lateral habitus; 43, head, frontal view.