Strioderes peruanus Giorgi, 2001: 3

Nearns, Eugenio H. & Tavakilian, Gérard-Luc, 2012, A new genus and five new species of Onciderini Thomson, 1860 Coleoptera: Cerambycidae: Lamiinae) from South America, with notes on additional taxa, Insecta Mundi 2012 (266), pp. 1-23 : 14-16

Strioderes peruanus Giorgi, 2001: 3

( Figures 7 a-d)

Description. Female. Length 17.0 mm (measured from vertex to elytral apices), width 8.0 mm (measured across humeri). Habitus as in Fig. 7b. General form elongate-ovate, moderate-sized. Integument ferrugineous to dark brown, with ochraceous and dark orange pubescence; pronotum and basal 1/2 of elytra with sparse ochraceous pubescent maculae; apical 1/2 of elytra with large, irregularly-shaped, dark orange pubescent maculae; pro- and mesosternum with gray pubescence.

Head with frons distinctly flat, strongly transverse, about 4 times width of one lower eye lobe (as in Fig. 7d). Eyes with lower lobes small, ovate-oblong; eyes divided into separate upper and lower lobes, not connected by continuous row of ommatidia. Genae distinctly elongate, about 1.5 times height of lower eye lobes.

Antennae distinctly shorter body; antennal feebly elevated, widely separated; tubercles unarmed; scape clavate; antennomeres III strongly clavate, distinctly expanded at apical half ( Fig. 7b). Antennal formula based on antennomere III: scape=0.58; II=0.16; III=1; IV=0.53; V=0.31; VI=0.27; VII=0.26; VIII=0.21; IX=0.22; X=0.16; XI=0.16 (right antenna damaged, missing antennomeres VI-XI).

Pronotum subcylindrical, strongly transverse, about 1.6 times as wide as long, sides nearly straight, without lateral protuberances ( Fig. 7b); disk entirely striated, with deep basal transverse sulcus.

Scutellum transverse, apex rounded; lateral margins and center glabrous, remainder clothed in ochraceous pubescence.

Elytra nearly 2 times as long as width at humeri ( Fig. 7b), about 4.5 times as long as pronotal length, about 1.4 times broader basally than pronotum at widest; lateral margins slightly sinuate, sides feebly expanded at middle, gradually rounded to apices at apical 1/2, apices jointly rounded; basal 1/3 of elytra with dense punctation, surface coarsely, granulate-punctate, with mix of shallow and moderatelydeep punctures; humeri prominent, anterior margin arcuate, angle with moderate-sized, obtuse tubercle.

Venter with procoxae large, globose, not uncate; narrowest area of prosternal process between procoxae about as wide as procoxal cavity; apex of prosternal process subtriangular. Mesosternal process about as wide as mesocoxal cavity; mesosternal process subtruncate. Fifth abdominal sternite about 2 times as long as IV, with a median triangular impression.

Legs short in length; femora robust; metafemora clavate apically; tibiae slightly expanded apically; metafemora about 1/4 as long as elytra; tarsomere V about as long as I-IV combined (specimen legs damaged as follows: missing tarsi on left fore- and hindlegs; missing tarsomeres III-V on right midleg; missing right hindleg).

Material Examined. Holotype, male ( Fig. 7a, c), “ Peru, Junin, Sani Beni, rain forest, XII.8-1938, F. Woytkowski Collector, E.G. Linsley collection, Cal. Ac. Sc. ” ( MNRJ). Two specimens, one male (disarticulated for morphological study), “Brasil Pará, Benevides, 15-III-1990, W.L. Overal ” ( MNRJ); one female ( Fig. 7b, d), “ Peru V.13, Gerstner ” ( ACMS).

Diagnosis and Remarks. This species is distinguished by the combination of the following characters: frons distinctly flat; eyes divided into separate upper and lower lobes, not connected by continuous row of ommatidia; and sexually dimorphic antennomere III, distinctly swollen, strongly clavate (males) or strongly clavate, distinctly expanded at apical half (females).