Trestonia skelleyi, Martins, Ubirajara R., Santos-Silva, Antonio & Galileo, Maria Helena M., 2015

Martins, Ubirajara R., Santos-Silva, Antonio & Galileo, Maria Helena M., 2015, Fourteen new species, one new genus, and eleven new country or state records for New World Lamiinae (Coleoptera, Cerambycidae), Zootaxa 3980 (1), pp. 81-105 : 83-84

Trestonia skelleyi sp. nov.

( Figs. 5–8 )

Description. Integument dark-brown; antennomere III brown, except the apex dark-brown; antennomeres IV–IX reddish-brown on basal half, dark-brown on distal half (the latter lighter from IV to IX, always darker near apex); antennomere X reddish-brown on basal two-thirds, brown on distal one-third; antennomere XI reddish-brown on basal four-fifths, brown on distal one-fifth; gula and parts of ventral side of head reddish.

Head. Pubescence on frons and frontal sides of antennal tubercles yellowish-brown, except for large spot of white pubescence on each side close to the clypeus; wide band of white pubescence from level of middle of inferior ocular to area between antennal tubercles. Pubescence yellowish-brown on vertex, area behind eyes, and genae. Apex of antennal tubercles acute, projected. Distance between superior ocular lobes equal to 0.4 times scape length; distance between inferior ocular lobes equal to 0.9 times scape length. Antennae as long as 2.2 times elytral length; ventral side of antennomeres III–VIII with dark, thick setae ventrally (gradually sparser from III to VIII); antennal formula (ratio) based on antennomere III: scape = 0.68; pedicel = 0.18; IV = 1.00; V = 0.89; VI = 0.79; VII = 0.76; VIII = 0.68; IX = 0.67; X = 0.55; XI = 0.55.

Thorax. Pronotum with five tubercles: two large and flat, on each side of anterior half, partially divided by oblique sulcus; two more small and conical, near base of former; the last longitudinal, from near base to about middle; oblique, deep, wide sulcus from area behind lateral tubercles to sides of prothorax. Prothorax with small tubercle laterally, near apex of basal one-third. Pubescence of prothorax yellowish-brown (not obscuring integument), except for whitish pubescence at area behind and laterally to the procoxae. Mesosternum, mesepisterna, mesepimera, metepisterna and metasternum with dense, whitish pubescence. Scutellum with yellowish-brown pubescence, not obscuring integument. Elytra coarsely, abundantly punctate on basal one-third, gradually finer, sparser towards apex; apex truncate (almost rounded); pubescence yellowish-brown, black and white, forming designs ( Fig. 5 ).

Abdomen. Urosternites with yellowish-brown pubescence, dense and whitish- yellow at laterally at distal onethird of urosternites II–IV and laterally on urosternite V; ventrites I–IV maculate with small, sparse areas of whitish-yellow pubescence. Legs. Metatarsomere I as long as 0.8 times II–III together; metatarsomere V (without claws) as long as 0.8 times I–III together.

Variability. Antennomere XI completely reddish-brown; brown aspects of antennomeres VII–X or VIII–X small; spots of white pubescence near clypeus fused, forming a wide transverse band.

Dimensions in mm (male). Total length, 10.6–11.5; length of prothorax at center, 1.9–2.0; widest width of prothorax, 2.4–2.5; anterior width of prothorax, 2.1–2.2; posterior width of prothorax, 2.2–2.3; humeral width, 3.3– 3.5; elytral length, 7.6–8.2.

Type material. Holotype male from BOLIVIA, Santa Cruz: 4 km N Bermejo (Refugio Los Volcanes, 18º06’S, 63º36’W; 1,000 m), 4–8.X.2007, J. Wappes & R. Morris col. ( MNKM). Paratypes—BOLIVIA, Santa Cruz: Refugio Los Volcanes (3,363’), 2 males, 1–10.X.2008, Morris & Wappes col. ( MZSP, RFMC); Florida (4 km N of Bermejo, Refugio los Volcanes, 18º06’S, 63º36’W, 1,000–1,200 m), 1 male, 1 female, Skillman & Wappes col. ( FWSC); 1 female, 16.XII.2012, Skillman & Wappes col. ( FWSC); 2 males, 1 female, 25–29.X.2011, Wappes & Skillman col. ( ACMT); Refugio los Volcanes (3,400–4,200 ft., 18º06’S, 63º36’W), 3 females, 2 males 16– 20.IX.2012, Wappes, Skelley, Bonaso & Hamel col. (2 females, ACMT; 1 female, FSCA; 2 male, MZSP); 4km N of Bermejo, Refugio los Volcanes, El. 1,045–1,300m, 18°06’S, 63°36’W, October 17–24, 2014, Wappes and Morris (1 female ACMT, 1 female RFMC).

Diagnosis. Trestonia skelleyi belongs to the group of species without distinct and well delimited spot(s) on frons. Among those species, it is similar to T. grisea Martins & Galileo, 1990 and T. lateapicata Martins & Galileo, 2010 , but differs as follows: elytral whitish pubescence not covering basal two-thirds (covering in T. grisea and T. lateapicata ); distal half of elytra with black, semi-circular spot (black spot larger and irregular in T. lateapicata ; almost absent in T. grisea ). Trestonia skelleyi is similar to some species with distinct and well delimited spot(s), by the presence of semi-circular dark spot on elytra, but differs from all of them by the absence of the former.

Remarks. The key by Dillon & Dillon (1946) does not allow the easy recognition of Trestonia species, because the character used in couplet “4” (pubescence of urosternites) can place the same species into different couplets. For example, in T. ceara Dillon & Dillon, 1946 , the pubescence can be totally white, yellowish-white, distinctly yellow, or yellow with distinct white areas. Thus, we prefer not to include Trestonia skelleyi in this key.

Etymology. The species is named for Paul E. Skelley (FSCA), who collected part of the type series and, for his continual assistance with publication of many of our taxonomic works.

Figures

FIGURES 1 – 12. 1 – 4. Bisaltes (Bisaltes) lingafelteri, holotype female: 1. Dorsal habitus; 2. Ventral habitus; 3. Lateral habitus; 4. Head, frontal view. 5 – 8. Trestonia skelleyi, holotype male: 5. Dorsal habitus; 6. Ventral habitus; 7. Lateral habitus; 8. Head, frontal view. 9 – 12. Dolichestola egeri, holotype male (?): 9. Dorsal habitus; 10. Ventral habitus; 11. Lateral habitus; 12. Head, frontal view.