Estola orellana, Bezark, Larry G., Galileo, Maria Helena M. & Santos-Silva, Antonio, 2016

Bezark, Larry G., Galileo, Maria Helena M. & Santos-Silva, Antonio, 2016, Description of four new South American species of Desmiphorini (Coleoptera, Cerambycidae), Zootaxa 4138 (1), pp. 171-180 : 178-180

Estola orellana sp. nov.

( Figs. 16–19 )

Description. Female. Head and pronotum black; ventral side of thorax and abdomen dark-brown (slightly lighter on abdomen); scape and pedicel dark-brown; antennomere III orange-brown dorsally and laterally on basal quarter and along central area of ventral side, dark-brown on remaining surface; antennomere IV orange-brown on basal third (almost basal half ventrally), dark-brown on remaining surface; antennomere V orange-brown on basal fifth, dark-brown on remaining surface; antennomere VI yellowish on base, gradually reddish-brown toward base of distal third that is dark-brown (reddish-brown region reaching about distal quarter ventrally); antennomere VII orange-brown on narrow basal ring, dark-brown on remaining surface; antennomeres VIII and X yellowish, with narrow reddish-brown apical ring; antennomere IX and XI yellowish on basal half, dark-brown on distal half; elytra black, gradually dark-brown toward apex; femora dark-brown; tibiae reddish-brown on basal quarter, orange-brown on second basal quarter, dark-brown from middle to base of distal quarter, orange-brown dorsally and laterally on distal quarter (this area brown on mesotibiae), reddish-brown ventrally on distal quarter (this area brown on mesotibiae, orange-brown on metatibiae); tarsi brown, except for orange-brown segment V (more reddish-brown near apex).

Head. Frons rectangular, finely, abundantly punctate (punctures obliterated by pubescence); pubescence reddish-brown, yellowish close to eyes and clypeus and on two large spots on each side of central area between lower eye lobes; with long, erect, sparse brownish setae. Area between antennal tubercles and upper eye lobes with punctures as on frons; with transverse band with yellowish pubescence between antennal tubercles, partially fused with pubescence of the same color close to upper eye lobes; with triangular macula with yellowish pubescence centrally between upper eye lobes; remaining surface with reddish-brown, distinctly less dense pubescence; with long, erect, sparse brownish setae. Area between posterior margin of eyes and prothorax with dense yellowish pubescence (more reddish-brown on some areas), interspersed with long, erect, sparse setae close to eyes. Submentum with yellowish pubescence. Genae with yellowish pubescence, except for glabrous distal region. Distance between upper eye lobes 0.75 times length of scape; distance between lower eye lobes in frontal view 1.15 times length of scape. Antennae 1.5 times elytral length, reaching elytral apex at distal third of antennomere IX; dorsal side of scape, and ventral side of antennomeres with thick, dark (some of them yellowish white), sparse, erect setae; antennal formula (ratio) based on antennomere III: scape = 1.00; pedicel = 0.31; IV = 1.14; V = 1.00; VI = 0.91; VII = 0.85; VIII = 0.71; IX = 0.60; X = 0.51; XI = 0.43.

Thorax. Prothorax subcylindrical, 1.4 times wider than long (including lateral tubercles); sides with small, distinct, acute tubercle slightly before middle. Pronotum coarsely, densely punctate (punctures partially obliterated on areas with light pubescence); with dense, oblique band with yellowish from base of anterior quarter (distinctly widened toward its apex); sides with dense, yellowish pubescence, partially fused with oblique band on anterior half; center of basal half with large macula with yellowish pubescence; anterior margin with yellowish pubescence, remaining surface with very short, indistinct reddish-brown pubescence; with erect, sparse setae. Sides of prothorax with punctures as on pronotum; with dense, yellowish pubescence. Prosternum and prosternal process coarsely, moderately abundantly punctate; with yellowish-white, not dense pubescence (but not sparse), interspersed with long setae (mainly on prosternal process). Mesosternum finely, abundantly punctate; with yellowish-white, not dense (but not sparse) pubescence. Mesepimera and mesepisterna with yellowish, dense pubescence. Anterior margin of mesosternal process abruptly inclined toward mesosternum. Metepisterna and metasternum with yellowish-white pubescence (more yellowish depending on angle of light). Metasternum coarsely, abundantly punctate laterally, distinctly finer, sparser centrally. Scutellum with yellowish, dense pubescence laterally, reddish-brown, distinctly less conspicuous on remaining surface. Elytra. Coarsely, abundantly punctate on basal third, gradually finer, sparser toward apex; with several spots with yellowish pubescence on basal 4/5 along suture, almost covering entire distal fifth; with wide, longitudinal, dorsal band with reddish-brown pubescence from humeri to distal fifth (more yellowish on basal quarter; interspersed with irregular spots with yellowish pubescence on remaining surface); with band with yellowish pubescence laterally, from base to apex; remaining surface with reddish-brown, more sparse and shorter pubescence; with thick, erect, sparse, dark setae throughout; apex rounded. Legs. Femora and tibiae with long, erect, sparse, yellowish-white setae.

Abdomen. Ventrites with yellowish-white pubescence (more yellowish depending on angle of light), interspersed with long, sparse setae (more abundant on ventrite V); ventrite V slightly depressed centrally near apex; apex of ventrite V truncate.

Variation. Yellowish pubescence on frons denser, not forming isolated spots; triangular macula between upper eye lobes prolonged backward as a narrow band; oblique band with yellowish pubescence on pronotum fused with band on anterior margin; yellowish pubescence on elytra occupying larger, more irregular areas.

Dimensions (mm). Holotype female/ paratype female. Total length (including mandibles), 6.20/5.80; prothoracic length, 1.20/1.20; anterior prothoracic width, 1.35/1.30; basal prothoracic width, 1.40/1.30; largest prothoracic width (between apices of lateral tubercles), 1.80/1.60; humeral width, 2.10/2.05; elytral length, 4.50/ 4.10.

Type material. Holotype female ( CASC) and paratype female ( LGBC) from ECUADOR, Orellana : 16 km N Coca, 20.II.2004, F. T. Hovore col.

Etymology. The species name orellana (apposition) refers to the province of Ecuador where the types were collected.

Remarks. Estola orellana is similar to E. fuscomarmorata Breuning, 1940 , but differs as follows: antennomere III shorter than IV; antennomere V as long as III; prothorax distinctly wider than long. In E. fuscomarmorata : antennomere III as long as IV; antennomere V shorter than III; prothorax slightly wider than long.

Breuning (1974) provided a key to species of Estola Fairmaire and Germain, 1859 , known at that time. Although sometimes it is very difficult to understand what Breuning (1974) meant in his key (frequently impossible without seeing the species included in the group), the new species can be included in the alternative of couplet “72” (translated):

72 (71). Basal half of antennomere IX yellowish................................................................ 72’ - Antennomere IX entirely dark brown. Brazil (Pará, Rio de Janeiro)...................... E. nebulosa Breuning, 1940 72’(72). Antennomere III about as long as IV; antennomere V shorter than III. Bolivia....... E. fuscomarmorata Breuning, 1940 - Antennomere III shorter than IV; antennomere V as long as III. Ecuador......................... E. orellana sp. nov.

Figures

FIGURES 16 – 19. Estola orellana sp. nov., holotype female: 16, dorsal habitus; 17, ventral habitus; 18, lateral habitus; 19, head, frontal view.