Trestonia wappesi Nearns and Swift, 2011

Nearns, Eugenio H. & Swift, Ian P., 2011, New taxa and combinations in Onciderini Thomson, 1860 (Coleoptera: Cerambycidae: Lamiinae), Insecta Mundi 2011 (192), pp. 1-27 : 15-16

Trestonia wappesi Nearns and Swift , sp. nov.

( Figures 6 a-c)

Description. Male. Length 8.7 mm (measured from vertex to elytral apices), width 2.7 mm (measured across humeri). Habitus as in Fig. 6a . General form elongate, subcylindrical, moderate-sized. Integument ferrugineous and dark brown with white, dark brown, ferrugineous, and ochraceous pubescence; scutellum, basal 2/3 of elytra, and venter with white pubescence; apical 1/3 of elytra distinctly darker, with dark brown and testaceous pubescence.

Head with frons roughly subquadrate, about 3.5 times width of lower eye lobe ( Fig. 6b ). Eyes with lower lobes oblong; narrowest area connecting upper and lower eye lobes about two ommatidia wide. Genae elongate, about 2/3 as tall as lower eye lobes.

Antennae about 1.5 times as long as body; antennal tubercles prominent, widely separated; tubercles armed at apex with short blunt tooth; scape robust, strongly clavate, a little shorter than antennomere III and IV; antennomere III slightly sinuous, about as long as IV; antennomeres IV-X becoming progressively shorter, XI distinctly longer than X; basal 1/2 of antennomeres IV-VIII with distinctly lighter pubescence.

Pronotum subcylindrical, slightly narrower at base, slightly transverse, about 1.1 times as wide as long, sides slightly sinuous, without lateral protuberances ( Fig. 6a ); disk with three feebly elevated tubercles; disk microsculptured and shallowly, sparsely punctate.

Scutellum transverse, sides straight, oblique, apex rounded.

Elytra about 2.25 times as long as width at humeri ( Fig. 6a ), about 3.6 times as long as pronotal length, about 1.25 times broader basally than pronotum at widest (at apex); sides straight, nearly parallel, elytral apices individually rounded; base of each elytron with a feeble gibbosity; basal 1/3 of elytra with dense punctation, surface coarsely punctate; humeri slightly prominent, anterior margin arcuate, angle with small, obtuse tubercle.

Venter with procoxae moderate, globose, not uncate ( Fig. 6c ); narrowest area of prosternal process between procoxae about 1/5 as wide as procoxal cavity; apex of prosternal process subtriangular. Mesosternal process about 1/2 as wide as mesocoxal cavity; mesosternal process deeply emarginate. Fifth sternite about as long as IV, apex feebly emarginate.

Legs short in length; femora clavate apically; tibiae slightly expanded apically; metafemora about 1/4- 1/5 as long as elytra.

Female. Length 9.9 mm (measured from vertex to elytral apices), width 3.0 mm (measured across humeri). Similar to male except antennae only slightly longer than body; antennomere XI shorter than X; fifth sternite about twice as long as IV, with a median triangular impression.

Type Material. Holotype, male ( Fig. 6 a-b), “ PANAMA, Bayano Dist. , 15 km W Ipeti, May 5 1984, E. Giesbert coll.” ( FSCA) . Allotype, female, same data as holotype ( FSCA) .

Etymology. We take pleasure in naming this species for James E. Wappes with appreciation for his friendship, encouragement, and inspiration. Jim has collected extensively in the Neotropics and has contributed greatly to our knowledge of Cerambycidae . The epithet is a noun in the genitive case.

Diagnosis and Remarks. This species is distinguished from its congeners by the following combination of characters: elytral with predominantly white pubescence except darker maculae at apical 1/3; venter with predominantly white pubescence; and distinctly small form. Three other species in this genus are known from Panama, but are not easily confused with T. wappesi . This species is most similar to Trestonia grisea Martins and Galileo, 1990 but can be separated by the shorter antennae (more than twice as long as body in male of T. grisea ), antennomere IV length (distinctly longer than III in T. grisea ); elytra proportions (more elongate in T. grisea ), and the mottled pubescence of the head (with predominantly testaceous pubescence in T. grisea ). Nothing is known about the habitat and behavior of this species; however, Martins (1975) reported that members of this genus oviposit in dead wood.

Figures

Figure 6. Trestonia wappesi, sp. nov. a) Holotype, male, dorsal habitus. b) Holotype male, close-up of head. c) Allotype female, close-up of sternum.