Oreodera pergeri Wappes and Santos-Silva, 2019

Wappes, James E. & Santos-Silva, Antonio, 2019, A new species, new geographical records, and taxonomic notes in Oreodera Audinet-Serville, 1835 (Coleoptera: Cerambycidae: Lamiinae), Insecta Mundi 698, pp. 1-11 : 2-4

Oreodera pergeri Wappes and Santos-Silva , new species

( Fig. 1–5 )

Description. Male ( Fig. 1–4 ). Integument mostly dark-brown, almost black in some areas; mouthparts dark reddish-brown, except yellowish-brown areas on palpomeres; anteclypeus and labrum fulvous; antennomeres dark reddish-brown except distal area dark-brown (lighter on III–IV); central area of gulamentum dark-reddish brown; central area of ventral surface of thorax dark reddish-brown; pro- and mesocoxae dark reddish-brown.

Head. Finely, densely punctate; with yellowish-white pubescence partially obscuring integument, whiter close to clypeus centrally; with a few long, erect brown setae laterally. Vertex and area behind eyes with dense yellowish-brown pubescence obscuring integument, and a few long, erect brown setae close to eyes, except: narrow area along median groove glabrous; central area between upper eye lobes glabrous; wide, triangular central area close to prothorax with white pubescence partially obscuring integument; area behind lower eye lobes with longitudinal glabrous area on center of pubescent area and glabrous close to prothorax. Genae with dense yellowish-brown pubescence close to eyes, with a few long, erect brown setae interspersed, most of distal half glabrous. Antennal tubercles with sculpturing as on frons except narrow apex smooth; with yellowish-brown pubescence nearly obscuring integument, with pubescence more yellowish-white frontally. Median groove distinct from clypeus to prothoracic margin. Most of gulamentum nearly smooth, with slightly distinct transverse stria toward anterior area, wide posterior area glabrous, depressed, very finely punctate, with short yellowish-white pubescence not obscuring integument anteriorly. Wide central area of postclypeus with decumbent white pubescence close to frons (more yellowish-brown in sides of this area), with short, bristly white pubescence adjacent to the anteclypeus, glabrous laterally; with a few long, erect dark setae. Labrum coplanar with anteclypeus posteriorly, inclined anteriorly; with short, decumbent yellowish-white pubescence close to clypeus, gradually sparser, yellowish-brown pubescent toward apex, with a few long, erect dark setae interspersed; apex with fringe of golden pubescence. Distance between upper eye lobes 0.23 times length of scape; in frontal view, distance between lower eye lobes 0.56 times length of scape. Antennae 3.1 times elytral length, attaining elytral apex at distal end of antennomere V. Scape with inner and ventral sides distinctly widened from near base to about basal quarter, nearly parallel-sided in remaining area; with yellowish-white pubescence partially obscuring integument, more yellowish-brown in some areas, with long, erect, thick dark setae interspersed ventrally. Pedicel and antennomeres with yellowish-white pubescence not obscuring integument (whiter depending on light intensity); pedicel and antennomeres III–V with long, erect, thick dark setae ventrally, gradually shorter, sparser toward V; antennomeres VI ‒ X with long, erect dark setae at apex; antennomere XI curved inward, more so distally. Antennal formula (ratio) based on antennomere III: scape = 0.57; pedicel = 0.13; IV = 0.93; V = 0.89; VI = 0.87; VII = 0.82; VIII = 0.80; IX = 0.74; X = 0.73; XI = 0.73.

Thorax. Prothorax distinctly wider than long, with large, blunt lateral tubercle. Pronotum with three tubercles, one conical, large, distinctly elevated in each side of anterior half, another elongate, less elevated, placed centrally in posterior half; with transverse row of coarse punctures near anterior margin, inverted V-shaped row of coarse punctures in anterior half centrally, wide U-shaped row of coarse punctures in posterior half centrally, coarse punctures on lateral tubercles of prothorax, and transverse row of coarse punctures near posterior margin (coarser than other punctures); remaining surface smooth; pubescence mostly light yellowish-brown, partially obscuring integument, except pubescence brown on part of lateroanterior tubercles, irregular white pubescent band laterally, from anterior margin to near middle, and irregular areas with dark yellowish-brown pubescence laterally. Sides of prothorax with row of coarse punctures near anterior and posterior margins; remaining surface smooth; with yellowishbrown pubescence nearly obscuring integument. Ventral surface of thorax with dense yellowish-white pubescence centrally, more yellowish-brown laterally. Scutellum dense yellowish-white pubescent, more pale-yellow toward apex, except sides of anterior 2/3 with brownish pubescence.

Elytra. Coarsely punctate in basal third, gradually sparser toward midlength, then smooth toward apex; apex obliquely truncated; basal 2/3 with dense white pubescence, not obscuring punctures, including small white pubescent macula on each side of scutellum, basal seventh also with yellowish-brown pubescence laterally (darker, slightly sparser in inclined area), subcircular brownish pubescent spot near suture in anterior quarter, another similar pubescent spot after middle, slightly more distant from suture than the former, large lateral macula with brownish pubescence before middle, not obscuring integument, narrowly continuing along epipleural margin to about posterior third, then distinctly widened into another large brownish pubescent macula; posterior third with yellowish-brown pubescence, distinctly sparser than white pubescence, marbled with white pubescence, except lateral brownish pubescent macula (somewhat C-shaped, with projection in anterior arm, and posterior arm forming elliptical band with sparser, slightly darker pubescence).

Legs. Femora with white pubescence partially obscuring integument, some areas lighter yellowish-brown. Tibiae with white pubescence in anterior 2/3, sparser, bristly, yellowish-brown and brown in posterior third (distinctly darker on dorsal surface of mesotibiae); protibiae with sparse, long, erect, thick black setae in ventral surface of posterior third; metatibiae with sparse, long, erect, thick black setae dorsally and laterally. Tarsi distinctly long, especially pro- and mesotarsi; dorsal surface of tarsomere I with white pubescence in basal 2/3, distinctly sparser, dark-brown in distal third; laterobasal areas of tarsomere II with white pubescence, and remaining surface with sparse dark-brown pubescence; tarsomere III nearly entirely covered with sparse brownish pubescence; basal half of tarsomere V with sparse white pubescence marbled with brownish pubescence, and remaining surface with dark-brown pubescence.

Abdomen. Ventrites with dense pale-yellow pubescence (whiter on central area of I–II), yellower at apex of I–IV; dorsal surface of ventrite V lacking central sulcus; apex of ventrite V concave centrally.

Female ( Fig. 5 ). Differs from male by the shorter antennae (2.3 times elytral length, reaching elytral apex at apex of antennomere VI), antennomere XI not curved, and abdominal ventrite V longitudinally sulcate in anterior half centrally.

Variation. Labrum brown; ventral surface of thorax entirely dark-brown; pro- and mesocoxae darkbrown; antennae gradually yellowish-brown on lighter area of distal segments; pubescence on labrum nearly entirely yellowish-brown; erect dark setae on labrum more abundant; white pubescent area of elytra reaching or not the scutellum, but always projected forward centrally.

Dimensions (mm), holotype / paratypes male/ paratypes female. Total length, 15.25/14.85–15.05/13.70– 15.00; prothoracic length, 2.70/2.60–2.65/2.20–2.45; anterior prothoracic width, 3.90/3.80–3.90/3.50–3.80; basal prothoracic width, 3.90/3.80–4.10/3.50–3.80; widest prothoracic width, 4.90/4.75–4.85/4.00–4.50; humeral width, 5.80/5.60–5.85/5.10–5.55; elytral length, 11.10/10.60–10.70/10.05–11.20.

Type material. Holotype male – BOLIVIA, Santa Cruz: 4 km N Bermejo (Refugio Los Volcanes; 1045–1350 m; 18°06′S / 63°36′W), 17–24.X.2014, Wappes and Morris col. ( FSCA, formerly ACMT) . Paratypes – BOLIVIA, Santa Cruz: Potrerillo del Guendá ( Snake farm; 17°40′S / 63°27′W; 370-400 m), 1 male, 16.X.2011, Skillman and Wappes col. ( MZSP); 4 km N Bermejo ( Refugio Los Volcanes ; 1000 m; 18°06′S / 63°36′W), 1 male, 4–8.X.2007, J. Wappes and R. Morris col. ( ACMT); Florida (4 km N Bermejo; Refugio Los Volcanes ; 18°06′S / 63°36′W; 1000–1200 m), 1 female, 25–29.X.2011, Wappes and Skillman col. ( ACMT); 1 female, 28.X.2011, Skillman and Wappes col. ( FWSC); 1 female, 5.XII.2013, Skillman and Wappes col. ( FWSC); 1 male, 10.XII.2015, Skillman , Wappes and Kuckartz col. ( FWSC); 1 female, 12.XII.2015, Skillman , Wappes and Kuckartz col. ( FWSC); 3.7 km SSE Buena Vista (Hotel Flora and Fauna ; 430 m; blacklight trap; tropical transition forest), 1 male, 5–15.XI.2001, M.C. Thomas and B.K. Dozier col. ( FSCA); vicinity of Buena Vista (Flora and Fauna Hotel), 1 male, 27–31.X.2002, Morris and Wappes col. ( RFMC); Potrerillo del Guendá (Reserva Natural aka Snake farm; 400 m; 17°40′15″S / 63°27′26″W), 1 female, 13–17.XI.2012, Bettella , Bonaso and Romero col. ( MZSP); 1 male, 13–17.X.2014, Wappes and Morris col. ( ACMT).

Etymology. We are pleased to name this species for Robert Perger, La Paz, Bolivia for his enjoyable and informative consultations and published taxonomic contributions to the Coleoptera fauna of Bolivia.

Remarks. Oreodera pergeri new species is similar to O. albicans Monné and Fragoso, 1988 , but differs as follows: antennomere III in male distinctly shorter than humeral width; second dark macula on dorsal surface of the elytra near suture small and subcircular in both sexes; antennomere IV shorter than III in male; femora shorter, with femoral club thicker in both sexes. In O. albicans , the antennomere III in male is about as long as or slightly shorter than humeral width, second dark macula on dorsal surface of the elytra near suture, slender and elongated in both sexes, antennomere IV in male as long as or slightly longer than III, femora longer with femoral club slenderer in both sexes. It differs from O. albata Villiers, 1971 , O. granulifera Bates, 1872 , and O. basiradiata Tippmann, 1960 (see photograph of the holotypes at Bezark 2019), by the elytral punctures finer and denser (coarser and sparser in those species); male also differs from that of O. basiradiata by the longer antennae (shorter in male of O. basiradiata ); male differs from that of O. granulifera by the antennomere III distinctly shorter than humeral width (almost as long as humeral width in O. granulifera ), and by the protibiae not granulated ventrally (granulated in O. granulifera ), and lacking tubercles on basal area of the elytra in both sexes (present in O. granulifera ). Oreodera pergeri differs from O. leucostigma Monné and Fragoso, 1988 (see photograph of the holotype at Bezark 2019), especially by the pronotum with sparse punctures in wide central area (noticeably abundant in O. leucostigma ). It differs from O. semialba Bates, 1874 (see photograph of the holotype at Bezark 2019), by the humerus not granulated (granulated in O. semialba ), and elytra lacking tubercles in basal third (tuberculate in O. semialba ).

Little is known of the natural history of this species. Adults are most commonly encountered at MV/ UV lights, or otherwise at night, crawling or mating on recently felled tree trunks.

Figures

Figures 1–5. Oreodera pergeri. 1–4) Holotype male. 1) Dorsal habitus. 2) Ventral habitus. 3) Lateral habitus. 4) Head, frontal view. 5) Paratype female, dorsal habitus.