Eurysthea barsevskisi, Botero & Santos-Silva, 2017

Botero, Juan Pablo & Santos-Silva, Antonio, 2017, Review of the genus Eurysthea Thomson, 1861 (Coleoptera: Cerambycidae: Cerambycinae), Journal of Natural History (J. Nat. Hist.) 51 (45 - 46), pp. 2721-2743 : 2727-2731

Eurysthea barsevskisi sp. nov.

( Figures 1d–f and 3b )

Description

Male. Integument dark brown, almost black; mouthparts, antennae, legs (slightly darkened at apex of femora) yellowish-brown, lighter reddish-brown on some regions; elytra with large yellowish-brown macula covering most posterior 3/4 ( Figure 1d, f ) and entire outer margin.

Head. Frons finely, confluently punctate, mainly close to clypeus; with short, decumbent, moderately sparse, golden setae centrally, distinctly denser, covering integument laterally, longer, thicker, yellowish-white close to lower eye lobes. Area between antennal tubercles with sculpture and setae as on centre of frons. Area between upper eye lobes coarsely, confluently punctate; with short, decumbent, sparse, golden setae, slightly denser close to eyes, interspersed with long, erect, sparse setae. Remaining surface of vertex coarsely, moderately abundantly punctate (punctures finer, more abundant close to prothoracic margin); almost glabrous centrally, with short, decumbent, moderately abundant golden setae laterally, interspersed with long, decumbent, thicker, yellowish-white setae near prothoracic margin. Area behind upper eye lobes coarsely punctate toward vertex, gradually, more finely punctate toward lower eye lobes, except smooth, narrow area close to eye, gradually enlarged toward lower eye lobes; with short, decumbent, golden setae on punctate area, distinctly sparser toward lower eye lobes, interspersed with long, erect, fine setae. Area behind lower eye lobes smooth on large area close to eye, finely striatepunctate toward prothoracic margin; almost glabrous except area near eye with moderately long, sparse, yellowish setae toward ventral side of head. Coronal suture distinct from near clypeus to middle of area between upper eye lobes and prothorax (slightly distinct after upper eye lobes). Antennal tubercles minutely, sparsely punctate basally, with narrow area densely, minutely punctate closer to apex; with short, decumbent, sparse golden setae basally, distinctly denser toward apex. Genae finely, moderately sparsely punctate; with short, moderately sparse, decumbent, golden setae close to eye, gradually sparser toward apex, interspersed with long, decumbent, setae. Gula smooth close to prothorax, gradually slightly transversely punctate toward submentum, interspersed with fine, sparse punctures; with short, very sparse setae centrally close to submentum, distinctly longer laterally. Submentum transversely striate interspersed with shallow, sparse punctures laterally; with short and long, sparse, yellowish setae. Postclypeus centrally with sub-triangular, slightly elevated plate, longitudinally sulcate; plate finely, sparsely punctate, with short, sparse golden setae; area around plate with short, sub-erect, moderately abundant, golden setae and one very long, erect setae on each side. Labrum minutely punctate on transverse central area, smooth on remaining surface; with long, golden setae on punctate region (mainly laterally) and on anterior margin. Mandibles coarsely, confluently punctate laterally on basal 3/4, smooth dorsally and on lateral distal quarter; outer margin distinctly dentate at apex of punctate region; with short and long, golden setae on punctate lateral region, glabrous on remaining surface. Distance between upper eye lobes 0.5 times length of scape; distance between lower eye lobes in frontal view 0.8 times length of scape. Antennae 1.9 times elytral length, reaching elytral apex at distal quarter of antennomere VIII, antennomeres not carinate. Scape slightly enlarged toward apex; finely, abundantly punctate on base, gradually sparser toward apex; with short and long, decumbent, moderately sparse setae interspersed with long, erect setae. Pedicel and antennomeres III–X with short, decumbent, yellowish setae, denser toward distal antennomeres, interspersed with long, erect, yellowish setae, denser ventrally, shorter, sparser toward distal antennomeres. Antennomere III with long spine at inner apex (as long as 0.2 times length of antennomere). Antennomere IV with short spine at inner apex (as long as 0.1 times length of antennomere); Antennomeres V–X unarmed at apex. Antennal formula (ratio) based on antennomere III (without spine): scape = 0.57; pedicel = 0.16; IV = 0.70; V = 0.81; VI = 0.79; VII = 0.79; VIII = 0.76; IX = 0.72; X = 0.65; XI = 0.74.

Thorax. Prothorax cylindrical, longer than wide (1.1 times); sides without tubercle at centre, with small, rounded tubercle placed at middle of anterior half; posterior margin elevated (this area enlarged toward procoxal cavity), with oblique, elevated projection toward sides of pronotum; coarsely, confluently punctate except on smooth elevated posterior area, and anterior, sub-triangular area finely, sparsely punctate (this area enlarged toward ventral side, finely striate close to margin); with short, decumbent, abundant, golden setae on coarsely punctate region (sparser toward ventral side), interspersed with long, erect, fine and thick, yellowish setae and some lanceolate, yellowish-white setae; with minute, golden setae on posterior elevated region; with short, sparse, golden setae interspersed with some long, erect setae on subtriangular region. Pronotum with 5 isolated tubercles: two sub-rounded, elevated, placed on each side of posterior third, longitudinally sub-divided, with two narrow projections toward middle (outermost finer); two sub-conical, highest, placed on each side of anterior third; one elongated, lowest, placed on centre, oblong, from area of posterior tubercles and base of anterior tubercles, narrow, carina-shaped between anterior tubercles, enlarged, slightly distinct toward anterior margin. Pronotal surface coarsely, sparsely punctate between tubercles; transverse posterior plate moderately finely and abundantly punctate; area between tubercles and sides coarsely, abundantly punctate (punctures finer than in area between tubercles); with short, abundant, decumbent, golden setae (not obscuring integument, slightly denser on some areas), interspersed with fine, erect, long, yellowish setae and some lanceolate, yellowish-white setae laterally; surface of tubercles glabrous and smooth. Prosternum coarsely, abundantly punctate on posterior 2/3, elevated, transversely striate on anterior third; with short, moderately abundant, golden setae on posterior 2/3 (not obscuring integument), sparser on anterior third; basal 2/3 with long, sparse, yellowish-white setae laterally. Prosternal process longitudinally sulcate, more distinctly toward apex. Mesoventrite with sericeous pubescence, except on apex of lateral side with short, decumbent, golden setae, interspersed with some long, erect setae laterally. Mesepimeron and mesanepisternum with sericeous pubescence interspersed with long, erect, fine and thick, yellowish-white setae. Mesoventral process slightly depressed longitudinally; apex without lobe projected under mesocoxa; with short and moderately long, sparse yellowish setae. Metanepisternum with short, decumbent, moderately abundant, yellowish setae interspersed with some thick, yellowish-white setae. Metaventrite finely, sparsely punctate laterally, coarser, more abundant centrally, mainly anteriorly; with short, decumbent, moderately abundant yellowish setae laterally, interspersed with thick, yellowish-white setae; remaining surface with long, erect, sparse, yellowish setae. Scutellum with long, decumbent, thick, abundant, yellowish-white setae.

Elytra. Coarsely, abundantly punctate, mainly on circum-scutellar area, gradually finer, sparser toward apex; with moderately short and long, white setae (longer and more abundant on posterior quarter) interspersed with some long, lanceolate white setae; apex with long spine at outer angle, obliquely truncate toward slightly projected sutural angle; with longitudinal, irregular carina from apex of anterior quarter to posterior third (gradually less distinct toward apex).

Legs. Femora with long, moderately thick, sparse, yellowish-white setae. Tibiae with long, erect, thick, yellowish-white setae, except on ventral side of distal third with yellow setae.

Abdomen. Ventrites finely, sparsely punctate; with long, fine, sub-erect yellowish-white setae centrally, thicker, more abundant laterally. Ventrite V 0.75 times as long as IV; apex truncate, slightly emarginated centrally.

Dimensions in mm (male). Total length, 13,75; prothorax length, 2.20; anterior width, 1.60; posterior width, 1.90; largest prothoracic width, 2.00; humeral width, 2.80; elytral length, 9.85.

Type material

Holotype male from COLOMBIA, Cundinamarca: Vereda la Concepción ( Bosque La Guajira, 4°47 ʹ 34 ʺ N / 73°46 ʹ 33 ʺ W; 2911 m), 28–30 October 2015, V. Sinyaev & J. Machado col. ( MZSP).

Etymology

The new species is named after Arvids Barsevskis (ILST), expert on Cerambycidae from Philippines.

Remarks

Most of the species in Eurysthea have prothorax with lateral spines, but there are some that do not have spines: E. hirca ( Berg 1889) ; males of E. hirta ( Kirby 1818) ; E. obliqua ( Audinet-Serville, 1834) ; E. parva Martins & Galileo, 2013 ; E. rotundicollis ( Martins 1995) ; E. squamifera ( Martins 1967) ; E. barsevskisi sp. nov. Among these species, only Eurysthea barsevskisi and E. squamifera ( Martins, 1967) have the elytra with white differentiate setae scattered between the other setae. Eurysthea barsevskisi differs from the latter by the lanceolate setae (squamiform in E. squamifera ).

For additional comments, see remarks on E. antonkozlovi sp. nov.

Figures

Figure 1. (a–c) Eurysthea antonkozlovi sp. nov., holotype female: (a) dorsal habitus; (b) ventral habitus; (c) lateral habitus. (d–f) Eurysthea barsevskisi sp. nov., holotype male: (d) dorsal habitus; (e) ventral habitus; (f) lateral habitus.

Figure 3. Detail of elytra. (a) Eurysthea antonkozlovi sp. nov.; (b) Eurysthea barsevskisi sp. nov.; (c) Eurysthea tatianakozlovae sp. nov.; (d) Eurysthea nearnsi sp. nov. Arrows show the lanceolate setae.