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

Diagnostic Features
  • Description: Elongate-oblong, moderate to large-sized, ranging from about 10–22 mm in length. Integument generally dark brown or ferrugineous with whitish, ferrugineous, and ochraceous pubescence. Head with frons subquadrate, about as wide as width of 2 1/2 lower eye lobes. Eyes with lower lobes oblong. Genae transverse, distinctly shorter than lower eye lobes. Antennal tubercles prominent, widely separated; tubercles not armed at apex; antennae about as long as overall body length, or as much as 1 1/3 times as long; scape gradually expanded to apex, about as long or longer than antennomere IV; antennomere III nearly straight or curved, longer than scape and antennomere IV. Pronotum transverse, roughly cylindrical, with or without lateral tubercles. Elytra with sides roughly parallel; elytral apices individually rounded; elytra generally uniform in coloration or speckled; base of elytra without tubercles or with two prominent tubercles at humeri. Basal 1/3 of elytra with moderate to dense punctation, surface finely punctate or coarsely punctate. Procoxae without projection. Mesosternal process with apex subtruncate. 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: moderately large eyes; subquadrate frons; gradually expanded scape; strongly transverse, roughly cylindrical pronotum; and elytra with sides roughly parallel.

  • Similar genus/genera: strongly resembles some species of Lochmaeocles and Oncideres.
Geographic Distribution
  • South America (Brazil, French Guiana)
Host Plants/Trees
  • Unknown
Girdling Behavior
  • Unknown

The genus Oncioderes currently contains two species:
  Oncioderes picta Martins & Galileo, 1990 [holotype specimen, ♀]
  Oncioderes rondoniae Martins & Galileo, 1990 [holotype specimen, ♀]

Generic Synonymies
  • None
Selected References

Oncioderes picta
holotype 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.