Oncid ID: Tool for Diagnosing Adult Twig Girdlers (Cerambycidae: Lamiinae: Onciderini)
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Genus: Bacuris

Diagnostic Features
  • Description: Elongate-oblong, moderate-sized, ranging from about 12–19 mm in length. Integument generally ferrugineous with whitish and ochraceous pubescence. Head with frons subquadrate to slightly elongate, about as wide as width of 1–2 lower eye lobes; frons distinctly convex. Eyes with lower lobes distinctly large, oblong. Genae strongly transverse, distinctly shorter than lower eye lobes. Antennal tubercles prominent, widely separated; tubercles unarmed at apex or armed with small projection (males); antennae about as long (females) to about 1 1/2 times as long (males) as overall body length; scape clavate, about as long or slightly longer than antennomere IV; antennomere III feebly curved or feebly sinuate, distinctly longer than scape and IV; antennae annulate. Pronotum transverse, roughly cylindrical, slightly wider at apex, with lateral tubercles; pronotum with distinct, dark vitae. Elytra with sides distinctly wider towards apical 1/2; elytral apices individually rounded; elytra with vague vittae; base of elytra without prominent tubercles at humeri. Basal 1/3 of elytra with moderate to dense punctation, surface coarsely punctate to granulate-punctate. Procoxae without projection. Mesosternal process with apex subtruncate to feebly emarginate. Metafemora distinctly short, about 1/5 as long as elytra.

  • The combination of the following characters will help to distinguish this genus: integument generally ferrugineous; distinctly large eyes; pronotum roughly cylindrical, with distinct vitae; and elytra with sides distinctly wider towards apices.

  • Similar genus/genera: superficially resembles Cherentes.
Geographic Distribution
  • Central America (Costa Rica, Panama)
  • South America (Brazil, French Guiana, Peru)
Host Plants/Trees
  • Unknown
Girdling Behavior
  • Unknown
Notes

The genus Bacuris currently contains one species:
  Bacuris sexvittatus (Bates, 1865) [♂ specimen]
  Bacuris sexvittatus (Bates, 1865) [type specimen, ♀]

Generic Synonymies
  • The type species of this genus was originally described in the genus Eudesmus.
Selected References
 

Bacuris sexvittatus
♂ specimen
© E.H. Nearns

 

© 2011-2015 Nearns, E.H., Lord, N.P., and K.B. Miller
The University of New Mexico and Center for Plant Health Science and Technology, USDA, APHIS, PPQ.