Ochraethes skillmani Wappes, Santos-Silva and Botero, 2018

Wappes, James E., Santos-Silva, Antonio & Botero, Juan Pablo, 2018, Description of a new species of Ochraethes Chevrolat, 1860, redescription of Plocaederus mirim Martins and Monné, 2002, and new geographical records for Plocaederus Dejean, 1835 (Coleoptera, Cerambycidae, Cerambycinae), Insecta Mundi 609, pp. 1-8 : 2-3

Ochraethes skillmani Wappes, Santos-Silva and Botero , sp. nov.

( Fig. 1–4 )

Description. Female. Integument mostly black, shining; mouthparts dark reddish brown; tarsal claws dark reddish brown with dark brown areas; distal edge of abdominal ventrites I–IV with narrow yellowish-brown band.

Head. Frons finely, densely punctate except small, smooth, central area close to clypeus; with thick pale yellow (more whitish depending on angle of light source), setae on each side near clypeus (nearly disappears on left side, likely rubbed or abraded); with a few long, erect, fine yellowish-brown setae (yellower depending on angle of light source). Vertex finely, abundantly, partially confluently punctate except nearly smooth, sub-diamond shaped area between upper eye lobes; with thick pale yellow setae laterally (more whitish depending on angle of light source), denser between posterior margin of upper eye lobes and prothoracic margin, almost absent centrally; with a few long, erect, fine yellowish-brown setae. Area behind upper eye lobes with abundant, thick pale-yellow setae (more whitish depending on angle of light source); with a few long, erect, fine yellowish-brown setae close to eye. Area behind lower eye lobes with short, sparse, thick pale-yellow setae close to eye on area closer to upper eye lobe, gradually, finer, sparser, whitish toward ventral side; remaining surface nearly glabrous. Gena, close to lower eye lobes, minutely, abundantly punctate, smooth toward apex; with sparse, moderately thick yellowish white setae close to lower eye lobe, glabrous toward apex. Antennal tubercles, in frontal view, slightly elevated and acuminate at apex; finely, densely punctate, punctures gradually finer, sparser toward smooth narrow distal area; nearly glabrous. Median groove distinct from clypeus to area near prothoracic margin. Postclypeus finely, abundantly punctate on wide central area, smooth laterally; with a few thick, pale yellow setae, with long, erect, fine yellowish-brown setae interspersed laterally. Labrum coplanar with anteclypeus at basal half, inclined at distal half; minutely, moderately sparsely punctate; with long, erect, fine, sparse yellowish-brown setae laterally. Distance between upper eye lobes 1.17 times length of scape; in frontal view, distance between lower eye lobes 1.29 times length of scape. Antennae 0.81 times elytral length, apex slightly surpassing basal third of elytra. Scape, moderately coarsely, abundantly punctate, sparser toward apex; nearly glabrous dorsally, with fine, sparse yellow- ish setae laterally and ventrally. Pedicel and antennomeres III–X with long, erect, thick brown setae ventrally (especially toward inner side); antennomeres III–VIII with short, thick white setae (denser on V–VII); antennomeres IX–XI minutely yellowish-brown pubescent with fine, longer yellowish white setae interspersed. Antennomeres III–V elongate, slightly widened toward apex; antennomeres VI–VII strongly widened toward apex; antennomeres VIII–X sub-rectangular; antennomere XI wide, rounded at apex. Antennal formula (ratio) based on antennomere III: scape = 1.48; pedicel = 0.52; IV = 0.82; V = 0.87; VI = 0.87; VII = 0.87; VIII = 0.78; IX = 0.74; X = 0.65; XI = 1.04.

Thorax. Prothorax slightly wider than long, somewhat rounded laterally. Pronotum moderately finely reticulate-punctate; with thick, pale yellow setae close to base laterally and distal margin (more yellowishbrown depending on angle of light source); with thick, pale yellow pubescence on sides of central area (sparser than on basal and distal areas); remaining surface nearly glabrous except some areas with minute, decumbent whitish setae and a few long, erect, fine yellowish-brown setae interspersed. Sides of prothorax with sculpturing as on pronotum; with wide, pale yellow pubescent band close to basal margin (fused with lateral pubescence on pronotum), sparse, pale yellow pubescent band at about center of distal half, also fused with that on central side of pronotum, and narrow, pale yellow pubescent band close to distal margin, fused with that on pronotum; remaining surface nearly glabrous. Prosternum with white pubescence not obscuring integument. Center of mesoventrite and mesoventral process nearly glabrous; sides of mesoventrite with dense, pale yellow pubescence; mesanepisternum and mesepimeron with dense, pale yellow pubescence, sparse to nearly absent and some areas glabrous. Metanepisternum and sides of metaventrite with dense, pale yellow pubescence, gradually sparser, whiter toward central area; metaventrite with long, erect, sparse, fine yellowish white setae centrally. Scutellum finely, mod- erately sparsely punctate; glabrous except sparse, thick white setae close to margins. Elytra. Finely, densely punctate throughout; with thick, abundant, decumbent yellowish-brown setae (more pale yellow depending on angle of light source) with similar white setae interspersed, except on circum-scutellar area with a few thick, decumbent white setae, and transverse, wide band after middle, with sparser setae from near epipleura to near suture; with fine, long, erect yellowish white setae throughout (more yellow depending on angle of light source); apex truncate. Legs. Femora with decumbent yellowish white setae not obscuring integument, setae distinctly sparser on outer side. Tibiae with yellowish-white setae, gradually bristly toward apex, setae distinctly sparser on outer side. Metatarsomere I 1.2 times longer than II–III together.

Abdomen. Ventrites with dense, pale yellow pubescence laterally, gradually sparser, whiter toward center. Apex of ventrite V slightly rounded.

Dimensions in mm (holotype female). Total length, 9.60; prothoracic length, 1.95; basal prothoracic width, 1.80; distal prothoracic width, 1.65; widest prothoracic width, 2.10; humeral width, 2.90; elytral length, 6.60.

Type material. Holotype female: MEXICO, Oaxaca: MX 175 ( Portillo del Rayo , on flowers), 20.X.2005, F. Skillman & B. Eya col. ( FSCA; formerly in FWSC).

Etymology. Named for Fred Skillman, one of the collectors of the holotype.

Remarks. Among the species of Ochraethes , O. skillmani sp. nov. is most similar to O. brevicornis ( Chevrolat, 1860) ( Fig. 5 ), but differs as follows: body stout; pronotum with sparser pubescence centrally; elytra without contrasting pubescent band along suture, but with a sparsely pubescent transverse band at base of posterior third. In O. brevicornis ( Fig. 5 ), the body is slender; the pronotum is distinctly pubescent throughout; the elytra have a contrasting pubescent band along suture, but lack a sparsely pubescent transverse band.

Figures

Figures 1–5. Ochraethes spp. 1–4, Ochraethes skillmani sp. nov., holotype female. 1) Dorsal habitus. 2) Ventral habitus. 3) Lateral habitus. 4) Head, frontal view. 5) Ochraethes brevicornis, holotype female, dorsal habitus (from Bezark 2017).