Peritrox marcelae Nearns and Tavakilian

Nearns, Eugenio H. & Tavakilian, Gérard-Luc, 2012, New Taxa and Combinations in Onciderini Thomson, 1860 (Coleoptera: Cerambycidae: Lamiinae) from Central and South America, with notes on additional taxa Eugenio H. Nearns, Insecta Mundi 2012 (231), pp. 1-24 : 6-8

Peritrox marcelae Nearns and Tavakilian , sp. nov.

( Figures 2a–d )

Description. Male. Length 16.0–17.0 mm (measured from vertex to elytral apices), width 5.5–6.0 mm (measured across humeri). Habitus as in Fig. 2a . General form elongate-oblong, moderate-sized. Integument dark brown, antennomeres I, II, basal 5/6 of III, and basal 2/3 of IV with grayish pubescence, distinctly lighter than V-XI, which are uniformly dark brown; elytra with red-orange pubescence, with dense field of small and moderately-sized, dark brown maculae outlined with ring of white pubescence; legs with grayish pubescence; legs with grayish pubescence.

Head with frons distinctly elongate, a little wider than width of one lower eye lobe (as in Fig. 2c ). Eyes with lower lobes large, oblong; narrowest area connecting upper and lower eye lobes about 6 ommatidia wide. Genae roughly subquadrate, about half as tall as lower eye lobes.

Antennae about 2 times longer than body; antennal tubercles prominent, narrowly separated, contiguous at base; tubercles armed at apex with short blunt horn; scape robust, gradually expanded to apex; antennomeres III, X, and XI slightly curved. Antennal formula based on antennomere III: scape=0.55; II=0.08; III=1; IV=0.72; V=0.6; VI=0.54; VII=0.5; VIII=0.48; IX=0.47; X=0.51; XI=0.77.

Pronotum subcylindrical, slightly wider at base, transverse, about 1.5 times as wide as long, sides irregular, with a small, blunt protuberance each side behind middle ( Fig. 2a, d ); disk with five feebly elevated tubercles, median tubercle oval, lateral tubercles slightly longer, elongate; disk with 8-10 fine punctures at basal transverse sulcus.

Scutellum transverse, apex rounded.

Elytra about 2 times as long as width at humeri ( Fig. 2a ), nearly 4 times as long as pronotal length, about 1.3 times broader basally than pronotum at widest (at base); lateral margins nearly straight, sides roughly parallel, gradually rounded to apices at apical 1/3, apices jointly rounded; basal 1/3 of elytra with moderate punctation, surface finely punctate, with mix of shallow and deep 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 1/6 as wide as procoxal cavity; apex of prosternal process subtriangular. Mesosternal process about as wide as mesocoxal cavity; mesosternal process subtruncate-rounded. Fifth sternite slightly longer than IV.

Legs moderate in length; femora robust; metafemora clavate apically; tibiae slightly expanded apically; metafemora about 1/3 as long as elytra.

Female. Length 19.5–24.0 mm (measured from vertex to elytral apices), width 7.5–9.0 mm (measured across humeri). Similar to male except antennae about 1.5 times as long as body; elytra about 1.5 times broader basally than pronotum at widest (at middle).

Type Material. Holotype, male ( Fig. 2a, c ), “ Montagne de Kaw , 11.XII.82 pk 35 P. L., P. Debost leg.” ( MNHN) . Allotype, female ( Fig. 2b ), “ 05/I/2011 lumière Piste Kapiri RN2 PK125, J-L Giuglaris leg.” ( PHDC). Four paratypes: one male ( Fig. 2d ), “ Guyane, 05/I/2008 lumière piste de Bélizon PK15+17, J-L Giuglaris leg.” ( JLGC); one male, “ Guyane, 06/IX/ 2011 lumière ZA Wayabo Matiti, J-L Giuglaris leg.” ( JLGC); one female, “ Guyane, 10/I/1994 lumière route de Kaw PK38, J-L Giuglaris leg.” ( JLGC); one female, “ Guyane, 01/IV/2003 lumière piste de Bélizon PK15+12” ( JLGC) .

Etymology. We are pleased to name this species in honor of Marcela Laura Monné, for her friendship and many contributions to the study of Neotropical Cerambycidae . The epithet is a noun in the genitive case.

c) Holotype male, close-up of head. d) Paratype male, dorsal habitus.

Diagnosis and Remarks. This species is distinguished from its congeners by the combination of the following characters: antennomeres I, II, basal 5/6 of III, and basal 2/3 of IV with grayish pubescence, distinctly lighter than V–XI, which are uniformly dark brown; and elytra with red-orange pubescence, with small and moderately sized, dark brown maculae outlined with ring of white pubescence. Peritrox marcelae , sp. nov. is described from six specimens: three males and three females. Nothing is known about the habitat and behavior of this species; however, all known specimens were collected in French Guiana, at light.

Figures

Figure 2. Peritrox marcelae, sp. nov. a) Holotype male, dorsal habitus. b) Allotype female, dorsal habitus.