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

Diagnostic Features
  • Description: Elongate-oblong, small to moderate-sized, ranging from about 8–14 mm in length. Integument generally dark brown or ferrugineous with whitish, ferrugineous, and ochraceous pubescence. Head with frons elongate, about as wide as width of 1 1/2 lower eye lobes. Eyes with lower lobes oblong. Genae elongate, distinctly shorter than lower eye lobes. Antennal tubercles prominent, moderately separated; tubercles not armed at apex or armed with a small projection, or with a short, blunt horn; antennae distinctly shorter (females) or slightly longer (males) than overall body length; scape clavate, about as long as antennomere IV; antennomere III sinuate, longer than scape and antennomere IV. Pronotum transverse, conical, wider at base, without lateral tubercles. Elytra with sides attenuate; elytral apices individually rounded; elytra generally uniform in coloration or speckled, or with distinct maculae; base of elytra with two prominent tubercles at humeri. Basal 1/3 of elytra with moderate to dense punctation, surface coarsely punctate. Procoxae without projection. Mesosternal process with apex deeply emarginate. Metafemora moderate in length, about 1/3 as long as elytra.

  • The combination of the following characters will help to distinguish this genus: moderately large eyes; conical pronotum, wider at base, without lateral tubercles; and elytra with sides attenuate.

  • Similar genus/genera: strongly resembles Furona and superficially resembles Alexera, Neolampedusa, Tulcoides, and Venustus.
Geographic Distribution
  • South America (Bolivia, Brazil, French Guiana, Paraguay)
Host Plants/Trees
  • Cucurbitaceae (Sechium edule)
Girdling Behavior
  • Unknown

The genus Plerodia currently contains two species:
  Plerodia singularis Thomson, 1868 [♂ specimen]
  Plerodia singularis Thomson, 1868 [type specimen]
  Plerodia syrinx (Bates, 1865) [syntype specimen]

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

Plerodia singularis
♂ 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.