Coleoxestia rafaeli, Santos-Silva & Wappes, 2017

Santos-Silva, Antonio & Wappes, James E., 2017, Six new species and a new country record of Coleoxestia Aurivillius, 1912 (Coleoptera, Cerambycidae, Cerambycinae), Insecta Mundi 2017 (572), pp. 1-19 : 11-13

Coleoxestia rafaeli sp. nov.

( Fig. 40–47 )

Description. Holotype male. Integument dark brown, almost black in some areas; antennae gradually dark reddish brown toward distal antennomeres; elytra gradually reddish brown toward apex; femora black on base of peduncle, gradually dark reddish brown toward club, peduncle dark reddish brown, slightly darker on apex.

Head. Frontal plate with margin close to clypeus rounded and area close to frontal depression not well delimited; finely, sparsely punctate laterally, smooth on remaining surface; with minute, sparse setae in anterolateral area, glabrous on remaining surface. Frontal depression well-marked, finely, shallowly punctate; with minute, sparse setae. Longitudinal carina very narrow and low between frontal plate and area between antennal tubercles, distinctly wider, more elevated toward posterior margin of upper eye lobes. Area between upper eye lobes smooth, with long, erect, sparse setae close to eyes. Area between upper eye lobes and prothoracic margin coarsely, abundantly punctate (punctures oblong toward prothorax); with minute, erect, sparse setae, gradually absent toward prothorax. Epicranial suture distinct from middle of frontal plate to base of antennal tubercles. Area behind upper eye lobes coarsely, abundantly punctate; with some long, erect setae close to eye; remaining surface glabrous. Area behind lower eye lobes narrowly tumid close to eye, smooth, glabrous toward upper eye lobe, coarsely punctate toward ventral side, with long, erect setae in punctate region; area close to tumid region sulcate, glabrous; area between sulcus and prothorax coarsely, abundantly punctate (punctures oblong, more dense close to prothorax), glabrous. Genae finely, very sparsely punctate ventrally, smooth dorsally; with minute, sparse setae interspersed with long, erect, sparse setae ventrally, glabrous dorsally. Submentum with minute, sparse punctures interspersed with some coarser, shallow punctures; with short and long, abundant, erect setae. Postclypeus smooth centrally, finely, sparsely punctate on sides of central region, smooth laterally; with minute, very sparse setae and one long, erect seta in punctate region. Labrum with anterior margin of coplanar region widely concave; finely, sparely punctate; coplanar region with long, erect setae laterally, short centrally; with fringe of long setae on [inclined, slanted?] apex. Antennal tubercles with apex elevated, narrowed; finely, sparsely punctate throughout; with minute, sparse setae. Distance between upper eye lobes 0.25 times length of scape; distance between lower eye lobes in frontal view 0.50 times length of scape. Antennae 1.5 times elytral length, reaching elytral apex at apex of antennomere X. Scape coarsely, abundantly, confluently punctate, finer, sparser near apex; with minute, sparse setae interspersed with some long, erect setae. Antennomere III with long, erect setae on inferior margin of inner side; sensorial area present in distal third; distinctly widened toward apex; apex angulose at outer side, rounded at inner side. Antennomeres IV–XI with sensorial area present from base to apex. Antennomeres IV–V with apex ortho-angulose. Antennomeres VI–X with apex acute-angulose. Antennomere XI not divided; greatest width 0.13 times its length. Antennal formula (ratio) based on antennomere III: scape = 0.65; pedicel = 0.13; IV = 0.65; V = 0.75; VI = 0.75; VII = 0.75; VIII = 0.75; IX = 0.75; X = 0.74; XI = 1.06.

Thorax. Prothorax wider than long (greatest width 1.1 times length); lateral tubercles distinct; sides of prothorax coarsely vermiculate-punctate between peripheral and semiperipheral sulcus; with long, sparse, erect setae. Pronotum with periphery narrowed laterally; surface with five gibbosities (two anterolateral more distinct and elevated); area between anterior and posterior constrictions coarsely plicate, less so on anterolateral and central gibbosities, interspersed with sparse, shallow punctures; with short, sparse, erect setae in basal half of disc, longer, more abundant laterally. Prosternum coarsely, sparsely punctate in basal half, with short, sparse setae (slightly denser close to procoxal cavities) interspersed with some long, erect setae; area between middle and peripheral sulcus tumid, transverse band with coarse, oblong, shallow punctures centrally; and minute, short sparse setae. Prosternal process slightly longitudinally elevated centrally; longitudinal central region smooth, glabrous; sides finely, abundantly punctate, with minute, abundant setae. Mesoventrite with short, decumbent, abundant setae, glabrous laterally on inner side. Mesepimeron, mesepisternum and metepisternum with short, abundant, decumbent setae. Mesoventral process without tubercle. Metaventrite finely, sparsely punctate; sides and area close to metacoxal cavities with narrow band of short, decumbent, abundant setae; with long, erect, sparse setae near central area; almost glabrous centrally, and areas between with short and long setae. Scutellum with minute, sparse setae, except for basal half of lateral sides with denser setae. Elytra. Opaque, slightly coriaceous, very finely vermiculate into network (less distinctly toward apex) with puncture in center of nearly all areas delimited by network (punctures gradually finer, sparser toward apex); glabrous, except for long, sparse setae in distal fifth; apex bispinose; margin of area between spines truncate, slightly oblique. Legs. Profemora sub-fusiform; meso- and metafemora clavate; meso- and metafemora with fringe of setae on peduncle and base of club; apices of meso- and metafemora rounded, not distinctly lobed.

Abdomen. Ventrites with minute, sparse setae centrally, denser laterally; with long, erect, sparse setae centrally, slightly more abundant from I to V; distal margin of ventrite V truncate, centrally widely concave.

Variation. Integument dark, but more reddish; distal region of palpomeres yellowish brown; elytra slightly lighter; area of frontal plate close to frontal depression well-marked; punctures in frontal depression coarser close to antennal tubercles; frontal depression with a few long, erect setae; longitudinal carina absent on frons; punctures on ventral side of genae more abundant; submentum with minute punctures more abundant, distinctly denser centrally; punctures on antennal tubercles more abundant, coarser on base, finer, sparser toward apex; peripheral sulcus not narrowed centrally on pronotum; two anterolateral gibbosities on pronotum not more distinct and elevated; anterolateral gibbosities on pronotum plicate as on remaining surface; basal half of prosternum with punctures slightly more abundant and short and long setae more abundant; distal margin of ventrite V slightly emarginate centrally.

Dimensions in mm (holotype male– paratype male). Total length 26.85–26.25; length of prothorax at center 4.00–4.00; greatest width of prothorax 4.40–4.40; anterior width of prothorax 3.40–3.40; posterior width of prothorax 4.05–4.05; humeral width 5.85–5.60; elytral length 20.10–20.00.

Type material. Holotype male from BRAZIL, Paraná: Céu Azul , X.2015, R. C. Barros col. ( MZSP) . Paratype male from Brazil, Santa Catarina: Corupá, XII.1947, (no collector indicated) ( FSCA).

Etymology. The new species is named after Rafael C. Barros, collector of the holotype which he kindly donated to MZSP collection.

Remarks. Coleoxestia rafaeli sp. nov. differs from C. denticornis (Gahan, 1892) as follows: scape less opaque and more distinctly punctate ( Fig. 44 ); antennomere III longer ( Fig. 40 ); femora more clavate ( Fig. 45–47 ). In C. denticornis the scape is more opaque and less distinctly punctate ( Fig. 48 ), the antennomere III is shorter ( Fig. 48 ), and the femora are more fusiform ( Fig. 49–51 ). It differs from C. errata mainly by the antennomere III angulose at apex (rounded in C. errata ). It can be separated from C. exotica Martins and Monné, 2005 and C. illex (Gounelle, 1909) by the antennomere III distinctly longer and angulose at apex (shorter and rounded in C. exotica and C. illex ). It differs from C. ebenina Melzer, 1935 by the general color lighter (black in C. ebenina ) and the pronotum plicate (coarsely and abundantly punctate in C. ebenina ). It differs from C. pubicornis (Gounelle, 1909) by the scape not distinctly coriaceous and abundantly punctate (coriaceous and not distinctly punctate in C. pubicornis ), by the antennomeres III–IV with apex angulose (rounded in C. pubicornis ), and by the femora more clavate (more distinctly fusiform in C. pubicornis ). It differs from C. setigera Melzer, 1926 ( Fig. 52 ) by the same differences as C. denticornis and by the pronotum and elytra without abundant, distinct short setae.

Coleoxestia rafaeli sp. nov. is included below in the alternative of couplet “22” from Martins and Monné (2005) (translated; modified):

22’(21). Elytra (20x) with short setae throughout; general color reddish; Brazil (São Paulo, Paraná,

Santa Catarina) ............................................................................... C. setigera Melzer, 1926 – Elytra glabrous, without setae or, at most, with sparse setae on apex ................................... 22

22(22’). Scape not distinctly opaque but distinctly punctate ( Fig. 52 ) ; antennomere III longer ( Fig. 52 ); femora clavate ( Fig. 57–59) ; Brazil (Paraná, Santa Catarina) ................ C. rafaeli sp. nov .

– Scape distinctly opaque but only slightly punctate (Fig. 60) ; antennomere III shorter (Fig. 60); femora more fusiform (Fig. 61–63); Brazil (Mato Grosso do Sul, Goiás, Paraíba, Pernambuco, Bahia, Minas Gerais, Espírito Santo, Rio de Janeiro, São Paulo, Paraná, Santa Catarina, Rio Grande do Sul), Bolivia, Paraguay......................................... C. denticornis (Gahan, 1892)

New Record

Coleoxestia rachelae Eya and Chemsak, 2005 is recorded from Peru, new country record. PERU, San Martin: Escalera Lodge (Tarapoto; 435 m), 2 females, 9-12.X.2012, J. B. Heppner col. ( FSCA). This species was described from, and remains known from, Costa Rica and Panama ( Monné 2016). Among the features differentiating this species, the antennomere XI almost or completely divided into a 12 th segment helps to define the species .

Figures

Figures 40–52. 40–47, Coleoxestia rafaeli sp. nov.: 40) holotype male, dorsal habitus. 41) Paratype male, dorsal habitus. 42) Paratype male, ventral habitus. 43) Paratype male, lateral habitus. 44) Paratype male, head. 45) Paratype male, profemur. 46) Paratype male, mesofemur. 47) Paratype male, metafemur. 48–51, C. denticornis, male: 48) Head and pronotum. 49) Profemur. 50) Mesofemur. 51) Metafemur. 52) C. setigera, holotype male, dorsal habitus.