Cyrtinus fisheri Wappes, Santos-Silva and Nascimento, 2020

Wappes, James E., Santos-Silva, Antonio & Nascimento, Francisco Eriberto de L., 2020, Taxonomic notes on Western Hemisphere Cyrtinini (Coleoptera: Cerambycidae: Lamiinae) including description of two new Cyrtinus LeConte species, Insecta Mundi 751, pp. 1-15 : 4-6

Cyrtinus fisheri Wappes, Santos-Silva and Nascimento , new species

( Fig. 10–17 )

Description. Holotype male ( Fig. 10–13 ). Head, prothorax, ventral surface of mesothorax, basal third of elytra, and most of surface of legs reddish-brown; remaining surface of elytra gradually dark-brown toward apex; femoral peduncle and base of tibiae irregularly dark yellowish-brown; scape yellowishbrown basally, brownish on remaining surface except small yellowish-brown dorsal macula on apex; pedicel reddish-brown, with yellowish-brown apex; antennomeres III–VII yellowish-brown anteriorly, reddish-brown posteriorly (yellowish-brown area gradually shorter toward VII); remaining antennomeres reddish-brown; ventral surface of metathorax dark reddish-brown basally, gradually brown toward apex; abdominal ventrites dark-brown, almost black.

Head. Frons convex, finely, sparsely rugose, with fine sparse punctures interspersed; with sparse yellowish-white pubescence, and a few erect yellowish setae interspersed. Vertex finely, densely rugose between antennal tubercles and posterior margin of eyes, finely, abundantly punctate close to pro- thorax; with short, decumbent, very sparse yellowish-white setae, with a few long, erect brown setae interspersed laterally, glabrous close to prothorax. Area behind upper eye lobes and between ocular lobes finely, longitudinally, densely rugose, except area closer to vertex and prothorax finely, densely punctate; glabrous. Area behind lower eye lobes nearly smooth and glabrous. Genae 1.3 times length of lower eye lobe, nearly smooth toward ventral surface, finely rugose toward clypeus, smooth on apex; with a few short yellowish setae, except glabrous apex, and a few long, erect dark setae interspersed. Postclypeus with a few erect, short yellowish-white setae, and a few long, erect dark setae on wide central area, glabrous laterally. Labrum with a few long, erect dark setae posteriorly, long pale-yellow setae anteriorly (shorter and more abundant than on posterior area). Distance between upper eye lobes 0.41 times length of scape (0.39 times distance between outer margins of eyes); in frontal view, distance between lower eye lobes 0.75 times length of scape (0.72 times distance between outer margins of eyes). Antennae 1.65 times elytral length, reaching elytral apex at middle of antennomere XI. Scape distinctly, gradually widened from anterior third; with short, sparse, decumbent yellowish-white setae, with a few short, erect yellowish-white setae interspersed. Pedicel and antennomeres with short, decumbent yellowish-white setae (more yellowish depending on light intensity), gradually, slightly more abundant toward antennomere XI, with short, erect yellowish-white setae interspersed; pedicel and antennomeres III–XI with very long, brownish tuft of setae directed backward on posterior quarter (tuft gradually less dense toward XI); antennomeres III–V pedunculate-clavate; antennomeres VI–VIII nearly pyriform; antennomeres IX–XI cylindrical. Antennal formula (ratio) based on length of antennomere III: scape = 2.20; pedicel = 0.30; IV = 1.00; V = 0.95; VI = 0.80; VII = 0.80; VIII = 0.70; IX = 0.60; X = 0.55; XI = 0.50.

Thorax. Pronotum finely, rugose-punctate on anterocentral area, finely, densely, longitudinally striate on wide central area, partially smooth close to posterior constriction, rugose-punctate on constricted posterior area; with a few short yellowish-white setae, and one long, erect dark seta on each side of constricted area. Sides of prothorax nearly smooth anteriorly (this area widened toward prosternum), finely, densely, longitudinally striate on wide central area close to pronotum, nearly smooth on wide central area close to prosternum, rugose-punctate posteriorly. Prosternum nearly smooth and glabrous laterally, somewhat rugose-punctate on wide central area; with short, decumbent, sparse white setae on punctate area. Prosternum with sculpturing as on central area of prosternum; narrowest area 0.4 times width of procoxal cavity. Mesoventrite with a few white setae centrally, glabrous laterally toward inferior area; mesanepisternum with sparse, slightly conspicuous setae close to mesoventrite, with white abundant pubescence laterally; mesepimeron with sparse white pubescence. Metanepisternum and posterior sides of metaventrite with yellowish-white pubescence not obscuring integument; remaining surface of metaventrite with short, very sparse white setae. Scutellum nearly glabrous basally, with short yellowish-white setae posteriorly. Elytra. Moderately flattened on anterior quarter, convex on posterior 3/4; slightly narrowed laterally after humeral area, gradually widened from this area to slightly past middle, then distinctly narrowed toward apex; apex rounded; with strongly elevated, nearly conical crest anteriorly, with short, sparse dark setae (distinctly not tuft-shaped); anterior third coarsely, somewhat abundantly punctate; remaining surface finely, sparsely punctate; anterior third with two white pubescent bands, one transverse, placed dorsally close to suture and near basal crest, and the other from middle of dorsal surface to epipleural margin, slightly oblique dorsally; remaining surface with short, decumbent, sparse yellowish-white setae, and long, erect, sparse, thick dark setae (slightly more abundant on posterior quarter. Legs. Femora with very sparse, decumbent white setae. Protibiae with very sparse yellowish-white setae, except posterior half of ventral surface with dense, bristly pale-yellow setae; mesotibiae with sparse, decumbent yellowish-white setae, slightly denser ventrally on posterior half, and dense, bristly yellowish-white setae dorsally on posterior half (slightly yellower toward apex); metatibiae with sparse, decumbent yellowish-white setae anteriorly, slightly, gradually more abundant toward apex, especially ventrally.

Abdomen. Ventrites with sparse, decumbent yellowish-white setae, more abundant close to apex of V; posterior margin of ventrite V truncate, slightly emarginate centrally.

Female ( Fig. 14–17 ). Color differences: Head dark reddish-brown; pronotum and superior area of sides of prothorax dark-brown; basal third of elytra reddish-brown and remaining surface gradually dark reddish-brown toward apex; ventral surface of mesothorax dark reddish-brown, with some dark brown areas; tibiae entirely reddish-brown; scape entirely reddish-brown; antennomeres VIII–XI brown. Nearly identical to male.

Dimensions in mm (holotype / paratype). Total length, 2.05/2.35; prothoracic length, 0.45/0.60; anterior prothoracic width, 0.40/0.60; posterior prothoracic width, 0.45/0.50; widest prothoracic width, 0.50/0.65; humeral width, 0.60/0.70; elytral length, 1.30/1.50.

Type material. Holotype male from MEXICO, Tampico , E.A. Schwarz coll. ( FSCA) . Paratype female,

same data as holotype ( ACMT, 1) There are places in several Mexican states named Tampico, thus it is not certain exactly where the specimens are from.

Etymology. Named after the late Warren S. Fisher, an early 20 th century USDA coleopterist who studied West Indian Cerambycidae and described several new Cyrtinus species and Sciocyrtinus , a genus of Cyrtinini .

Remarks. Following the key from Howden (1959), Cyrtinus fisheri can be included in the alternative of couplet “11”, with Cyrtinus opacicollis (Bates, 1885) , and Cyrtinus fauveli (Cameron, 1909) . It differs from C. opacicollis by the antennomeres distinctly thicker, and their basal segments pedunculate-clavate (slender and not pedunculate-clavate in C. opacicollis ); and from C. fauveli by the pronotum mostly longitudinally striate (smooth in C. fauveli ).

After Howden (1959) 16 species were described. However, none of those species agree with Cyrtinus fisheri due to one or more of the following features: sculpturing of prothorax; presence of basal crest on elytra; shape of the antennomeres; elytral pubescent pattern.

Figures

Figures 10–17. Cyrtinus fisheri. 10–13) Holotype male. 10) Dorsal habitus. 11) Ventral habitus. 12) Head, frontal view. 13) Lateral habitus. 14–17) Paratype female. 14) Lateral habitus. 15) Head, frontal view. 16) Dorsal habitus. 17) Ventral habitus.