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

Diagnostic Features
  • Description: Elongate-oblong, moderate-sized, about 18 mm in length. Integument generally dark brown with whitish and ochraceous pubescence. Head with frons subquadrate to elongate, about as wide as width of 3–4 lower eye lobes. Eyes with lower lobes ovate to distinctly narrow. Genae elongate, about as tall to distinctly taller than lower eye lobes. Antennal tubercles prominent, widely separated; tubercles not armed at apex or armed with a small projection, or with a short, blunt horn (males); antennae distinctly longer than overall body length, as much as twice as long; scape clavate, shorter than antennomere IV; antennomere III curved or sinuate, longer than scape and antennomere IV; antennomere XI shorter than X (females) or longer than X (males). Pronotum strongly transverse, roughly conical, wider at base, with lateral tubercles. Elytra with sides roughly parallel to attenuate; elytral apices individually rounded; elytra generally speckled; base of elytra with two prominent tubercles at humeri. Basal 1/3 of elytra with dense punctation, surface granulate-punctate. Procoxae without projection (females) or with distinct, curved hook (males). Mesosternal process with apex feebly to deeply emarginate. Metafemora moderate to short in length, about 1/3–1/4 as long as elytra.

  • The combination of the following characters will help to distinguish this genus: form elongate; ovate to distinctly narrow eyes, widely separated; antennae distinctly longer than overall body length, as much as twice as long; strongly transverse pronotum, roughly conical; and distinctly speckled elytra.

  • Similar genus/genera: superficially resembles Hesychotypa and Ischiocentra.
Geographic Distribution
  • South America (Brazil)
Host Plants/Trees
  • Unknown
Girdling Behavior
  • Unknown

The genus Eupalessa currently contains one species:
  Eupalessa attenuata (Thomson, 1868) [♂ specimen]
  Eupalessa attenuata (Thomson, 1868) [type specimen, ♀]

Generic Synonymies
  • The type species of this genus was originally described in the genus Oncideres and later transfered to Ischiocentra; the genus Eupales was subsequently renamed Eupalessa.
Selected References

Eupalessa attenuata
♂ 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.