Coleoxestia fragosoi, 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 : 7-9

Coleoxestia fragosoi sp. nov.

( Fig. 22–25 , 27–29 )

Description. Holotype female. Integument black (more dark brown under direct light); mouthparts dark reddish brown, slightly lighter on apex of palpomeres; antennae gradually brown toward distal segments; apex of abdominal ventrites II–IV with narrow, yellowish-brown band.

Head. Frontal plate kite-shaped, well-marked, not well-delimited toward antennal tubercles, deeply longitudinally sulcate except small area closer to clypeus; finely, abundantly punctate on sides of sulcus, except in area closer to clypeus sparsely punctate; with minute, sparse, erect setae. Frontal depression well-marked, deep, finely, abundantly punctate toward center of head, smooth toward sides. Area between upper eye lobes with smooth, slightly elevated, wide carina (general appearance tumid); area close to eyes with shallow, slightly distinct punctures, with long, erect, sparse setae. Area between upper eye lobes and prothoracic margin coarsely, abundantly punctate (punctures more oblong toward prothorax), except for smooth central area closer to eyes; glabrous. Epicranial suture distinct from frontal plate to antennal tubercles. Area behind upper eye lobes coarsely, abundantly punctate (punctures more oblong toward prothorax; with long, erect, sparse setae close to eye. Area behind lower eye lobes narrowly tumid close to eye, smooth, glabrous toward upper eye lobe, finely punctate toward ventral side, with long, erect, sparse setae; area close to tumid region deeply sulcate, glabrous; area between sulcus and prothorax smooth closer to sulcus, finely punctate closer to prothorax. Antennal tubercles opaque, finely punctate on base, smooth toward apex. Genae finely, sparsely punctate; with minute, sparse setae, ventrally interspersed with long, erect, sparse setae. Submentum opaque, minutely punctate, with surface somewhat irregular; with short, erect setae interspersed with slightly longer setae. Postclypeus opaque in large central area, shining laterally; finely, sparsely punctate in opaque region, smooth in shiny region; with minute, sparse setae in opaque region, glabrous in shiny region; with one long, erect seta on each side of opaque region. Labrum finely, moderately abundantly punctate; anterior margin of coplanar region widely concave; with short and long sub-erect setae. Distance between upper eye lobes 0.3 times length of scape; distance between lower eye lobes in frontal view 0.5 times length of scape. Antennae 1.4 times elytral length, reaching elytral apex at basal third of antennomere XI. Scape dorsally coarsely, abundantly punctate, gradually sparser toward apex; with short, minute setae interspersed with long, erect, sparse setae (more abundant ventrally). Antennomere III with long, erect, sparse setae ventrally; apex nodose. Antennomere IV with apex semi-angulose. Antennomere V with apex ortho-angulose. Antennomeres VI–X with apex acute-angulose. Antennomere XI not divided; greatest width 0.12 times its length. Antennal formula (ratio) based on antennomere III: scape = 0.56; pedicel = 0.13; IV = 0.50; V = 0.57; VI = 0.57; VII = 0.57; VIII = 0.55; IX = 0.56; X = 0.54; XI = 0.87.

Thorax. Prothorax slightly wider than long (greatest width 1.05 times length); lateral tubercles distinct; sides of prothorax coarsely vermiculate-punctate between peripheral and semiperipheral sulcus, with a few long, erect setae. Pronotum with peripheral sulcus well-marked throughout; fusiform plate narrow; surface with five low gibbosities, central one least distinct; area between anterior and posterior constrictions plicate on disc, interspersed with coarse, moderately sparse punctures (more so laterally), except smooth central gibbosity in basal half; with short, very sparse setae on disc, with some long, erect setae laterally in basal third. Prosternum coarsely vermiculate ion basal half, with some coarse, shallow punctures, distinctly sulcate along procoxal cavities, with short, abundant setae in sulcate areas, with short setae laterally, interspersed with long, erect setae, almost glabrous centrally; area between middle and peripheral sulcus somewhat striate, with coarse, shallow punctures laterally, almost glabrous. Prosternal process glabrous centrally, carinate, with short, abundant setae laterally, except on tumid, smooth, glabrous apex. Mesoventrite with short, decumbent, abundant setae, except on glabrous, tumid plate close to prosternal process, and sub-glabrous central area closer to mesoventral process. Mesepimerea, mesepisternum and metepisternum with short, decumbent, abundant setae. Mesoventral process without tubercle. Metaventrite minutely, sparsely punctate, interspersed with fine, sparse punctures toward center; with narrow band of short, decumbent setae laterally and along metacoxal cavities; remaining surface with short, sparse setae interspersed with some long, erect, sparse setae. Scutellum with minute setae laterally, glabrous centrally. Elytra. Opaque, coriaceous, mainly in basal half; very finely vermiculate into network (less distinct toward apex) with punctures in center of nearly all areas delimited by network; glabrous, except for minute, sparse setae near apex, interspersed with some long, erect setae; apex bispinose (spines long, with sutural one more distinctly spiniform); area between apical spines truncate. Legs. Profemora sub-fusiform; mesofemora sub-clavate; metafemora clavate; apices of meso- and metafemora with triangular lobe; metafemora with fringe of decumbent setae on peduncle and base of club. Metatibiae not longitudinally sulcate laterally.

Abdomen. Abdominal ventrites I–IV with short, decumbent, very sparse setae, slightly more abundant laterally, mainly on ventrites III–IV; with long, erect, sparse setae, more abundant on III–IV. Apex of ventrite V rounded, slightly emarginate centrally.

Dimensions in mm (male). Total length 31.60; length of prothorax at center 4.90; greatest width of prothorax 5.30; anterior width of prothorax 3.85; posterior width of prothorax 4.85; humeral width 7.50; elytral length 23.10.

Type material. Holotype male from BRAZIL, Rondônia: 62 km SW Ariquenes (near Rancho Grande Farm), 4-16.XI.1997, J. E. Eger col. ( FSCA).

Etymology. Named for Sergio A. Fragoso, 20 th century Brazilian worker and major contributor to the taxonomy of American Cerambycini (including Coleoxestia ).

Remarks. Coleoxestia fragosoi sp. nov. is similar to C. errata Martins and Monné, 2005 , but differs as follows: general color darker; antennomeres V–X more distinctly serrate at outer side ( Fig. 22 ); femora ( Fig. 27–29 ) thicker, more fusiform. In C. errata ( Fig. 26 ) the general color is light, more reddish brown, the antennomeres V–X ( Fig. 26 ) are less distinctly serrate at outer side, and the femora ( Fig. 30–32 ) are thinner and more clavate. It differs from C. vittata (Thomson, 1861) by the femora and elytra monocolorous (bicolorous in C. vittata ).

Coleoxestia fragosoi sp. nov. is included below in the alternative of couplet “38” from Martins and Monné (2005) (translated; modified):

38(37). Scape with very weak microsculpture, shining in appearance ............................................... 38’

– Scape microsculptured, opaque in appearance. Brazil (Goiás, Mato Grosso do Sul, Pernambuco, Bahia, Minas Gerais, Espírito Santo, Rio de Janeiro, São Paulo, Paraná, Santa Catarina, Rio Grande do Sul), Bolivia (Santa Cruz) ................................. C. pubicornis (Gounelle, 1909)

38’(38). General color from light brown to reddish brown; antennomeres V–X slightly serrate at outer side; femora ( Fig. 30–32 ) slender and more clavate; Brazil (Bahia, Minas Gerais, Rio de Janeiro, São Paulo, Santa Catarina), Bolivia (Santa Cruz) .... C. errata Martins and Monné, 2005

– General color black ; antennomeres V–X distinctly serrate at outer side; femora ( Fig. 27–29 ) thicker and more fusiform; Brazil (Rondônia) ........................................ C. fragosoi sp. nov .

Figures

Figures 17–26. 17–21, Coleoxestia chemsaki sp. nov., holotype male: 17) Dorsal habitus. 18) Ventral habitus. 19) Lateral habitus. 20) Head. 21) C. femorata, male, dorsal habitus. 22–25, Coleoxestia fragosoi sp. nov., holotype male: 22) Dorsal habitus. 23) Ventral habitus. 24) Lateral habitus. 25) Head. 26) C. errata, holotype male, dorsal habitus.

Figures 27–39. 27–29, Coleoxestia fragosoi sp. nov., holotype male: 27) Profemur. 28) Mesofemur. 29) Metafemur. 30–32, C. errata, holotype male: 30) Profemur. 31) Mesofemur. 32) Metafemur. 33–39, Coleoxestia hovorei sp. nov., holotype male: 33) Dorsal habitus. 34) Ventral habitus. 35) Lateral habitus. 36) Profemur. 37) Mesofemur. 38) Metafemur. 39) Head.