Mecometopus martinsi, Galileo, Maria Helena M. & Santos-Silva, Antonio, 2016

Galileo, Maria Helena M. & Santos-Silva, Antonio, 2016, Five new species and a new country record in American Cerambycidae (Coleoptera), Zootaxa 4196 (1), pp. 129-143 : 137-140

Mecometopus martinsi sp. nov.

( Figs. 26–29 )

Description. Female. Integument black; antennae dark-brown toward distal segments; each elytron with two grayish, wide, oblique band on anterior half (the most anterior not reaching lateral margin or suture; the other not reaching lateral margin, reaching suture).

Head. Frons and vertex finely, densely punctate; with minute, moderately abundant, decumbent, white setae distinctly not obscuring integument. Antennal tubercles with sculpture as on frons basally, gradually smooth toward apex. Tempora with sculpture and setae as on frons. Area below lower eye lobes slightly coarsely punctate than on frons, with punctures gradually sparser toward ventral side; with minute, decumbent, white setae (gradually sparser toward ventral side), interspersed with long, erect, yellowish setae. Genae 1.35 times longer than frontal length of lower eye lobes; finely, abundantly punctate close to eye, gradually sparser toward ventral side and smooth apex; with minute, decumbent, sparse, white setae, sparser toward ventral side, interspersed with long, erect, yellowish setae, glabrous at apex. Longitudinal sulcus distinct middle of frons to prothoracic margin. Submentum distinctly depressed on close to gula, mainly laterally, obliquely elevated toward mentum at anterior half; with short, sparse, decumbent, white setae interspersed with long, erect, yellowish setae. Distance between upper eye lobes 1.3 times length of scape; distance between lower eye lobes in frontal view 0.9 times length of scape. Antennae 0.7 times elytral length, reaching apex of basal quarter of elytra; scape slender, gradually enlarged toward apex; antennomere III slender, cylindrical; antennomere IV slender, slightly enlarged toward apex; antennomere V notably enlarged toward apex; antennomeres VI–X thick, cylindrical; antennomere XI thicker, narrowed toward apex; antennal formula based on antennomere III: scape = 1.21; pedicel = 0.36; IV = 0.65; V = 0.64; VI = 0.49; VII = 0.46; VIII = 0.34; IX = 0.33; X = 0.26; XI = 0.39.

Thorax. Prothorax slightly wider than long. Pronotum finely, densely punctate, with small asperities on anterior half; with slightly distinct longitudinal band with small, transverse keels (slightly wider centrally); anterior half with minute, decumbent, sparse, white setae (slightly more abundant on anterior quarter); posterior half with short, abundant, decumbent, white setae, slightly denser laterally, not obscuring integument. Sides of prothorax finely, densely punctate (punctures slightly coarser than on pronotum); with short, decumbent, abundant, white setae not obscuring integument, except almost glabrous anterior area (this area reaches about middle of anterior surface, widened toward pronotum). Prosternum with sculpture as on sides of prothorax, except smooth, narrow area close to anterior margin; with short, decumbent, abundant, white setae not obscuring integument. Mesosternum finely, densely punctate; centrally with wide band with decumbent, white setae (distinctly not obscuring integument), interspersed with long, erect, yellowish setae. Mesepisternum finely, abundantly punctate (punctures finer, denser close to mesepimeron); area close to mesepimeron with narrow band with white, thick setae, not reaching apex of segment, distinctly obscuring integument. Metepisternum finely, densely punctate; with short, decumbent, yellowish setae on anterior quarter, interspersed with white, decumbent setae, partially obscuring integument; with central, longitudinal band with white, thick setae from posterior margin to after middle, obscuring integument (narrowed, sparser toward anterior region). Metasternum finely, densely punctate; with wide, semicircular band with white, thick setae from posterior angles to central area close to mesosternal process; remaining surface with, short, decumbent, white setae not obscuring integument (denser laterally, mainly close to mesocoxal cavities). Scutellum with minute, brownish, decumbent setae, except for narrow, dense band with yellow setae laterally. Elytra. Minutely, densely punctate; with short, oblique band with sparse, white setae between humerus and scutellum; grayish areas with short, decumbent, white setae, distinctly not obscuring integument (anterior region of posterior band with yellow setae); with small spot with white setae laterally after middle; distal third with decumbent, abundant white setae (distinctly not obscuring integument), slightly denser on transverse band at center of region; remaining surface with minute, inconspicuous brownish setae; apex wide, slightly sinuous, with short, acute projection on outer and sutural angles (slightly longer on outer angle). Legs. Profemora fusiform; inner apex with triangular lobe slightly projected; outer apex with sub-spiniform projection turned down. Meso- and metafemora sub-claviform, with acute triangular lobe on outer and inner apex (slightly longer at metafemora). Femora with brownish, short setae (slightly conspicuous) interspersed with white setae on some regions. Metatarsomere I 2.3 times longer than II–III together.

Abdomen. Ventrite I covered with dense pubescence, yellowish centrally, white laterally, distinctly obscuring integument, except for narrow anterior region, widened toward sides; remaining surface with short, yellowishbrown, decumbent setae distinctly not obscuring integument. Ventrite II with wide, dense band with yellowish pubescence, distinctly obscuring integument, not reaching sides, narrow anterior margin (widened toward sides) and narrow area below sides of band of pubescence; remaining surface with short, yellowish-brown, decumbent setae distinctly not obscuring integument. Ventrites III–V with short, decumbent, moderately sparse yellowishbrown setae.

All ventrites with long, erect, sparse setae. Ventrite V flattened centrally (distal region depressed with sides slightly elevated); apex rounded.

Dimensions (mm). Holotype female/ paratype female (?). Total length (including mandibles), 9.70/9.45; prothoracic length, 2.55/2.80; anterior prothoracic width, 2.00/2.05; posterior prothoracic width, 1.85/2.00; largest prothoracic width, 2.60/2.70; humeral width, 2.70/2.90; elytral length, 6.50/6.55.

Type material. Holotype female from PERU, San Martín: Picota (9 km NE S6.9877 / W76.3345; 290 m), 6– 16.III.2005, J. Vasquez & M. E. Irwin col. ( MZSP) . Paratype female (?) from ECUADOR, Napo: Misahualli (near Tena), 26.VII–2.IX.2000, S. and P. Keller col. ( LGBC) .

Etymology. The new species is named after the late Ubirajara Ribeiro Martins de Souza.

Remarks. Mecometopus martinsi sp. nov. resembles the species of Itaclytus Martins & Galileo, 2011 , but differs mainly by the distal area of the elytra not reddish. It is also similar to some species of Pirangoclytus Martins & Galileo, 2011 , notably P. triangularis (Laporte & Gory, 1838) , but differs by the pronotum not reddish (a questionable generic feature, since the pronotum can be dark or reddish in P. triangularis ). It differs from P. triangularis mainly by the antennomeres VI–XI not yellowish, and by the central bands of the elytra not forming a distinct triangle. In P. triangularis the antennomeres VI–XI are yellowish, distinctly contrasting with III–V, and the central bands of the elytra form a distinct triangle.

It differs from Mecometopus polygenus Thomson, 1861 by the distal antennomeres not notably enlarged, by the central granules on pronotum slightly distinct, and by the elytral bands on basal half not densely pubescent. In M. polygenus the distal antennomeres are notably enlarged, the central granules on pronotum are distinct, and the elytral bands on basal half are densely pubescent. It can be separated from M. wallacei (White, 1855) by the antennae dark, by the granules on center of pronotum slightly distinct and by the bands on basal half of elytra without dense pubescence. In M. wallacei the antennae is yellowish, the granules on center of pronotum are distinct, and the elytral bands on basal half are densely pubescent.

Mecometopus martinsi sp. nov. can be included in the alternative of couplet “7” from Martins & Galileo (2011) (translated; modified):

7(6). Elytra with small lateral spot with whitish pubescence slightly after middle....................................... 7’ - Elytra without spot with whitish pubescence after middle..................................................... 8 7’(7). Antennae reddish; elytra with dense pubescent bands on basal half; tarsi light. Brazil (Amazonas).......................

...................................................................... M. cauaburi Martins & Galileo, 2011 - Antennae distinctly dark; elytra without dense pubescent bands on basal half; tarsi dark. Ecuador, Peru...................

.................................................................................... M. martinsi sp. nov.

Figures

FIGURES 26 – 33. 26 – 29, Mecometopus martinsi sp. nov., holotype female: 26, dorsal habitus; 27, ventral habitus; 28, lateral habitus; 29, head, frontal view. 30, Recchia volcanensis sp. nov., holotype female, upper eye lobes. 31, Recchia lanei, holotype female, upper eye lobes. 32 – 33, Recchia procera, paratype female: 32, upper eye lobes; 33, elytral apices.