Oncid ID: Tool for Diagnosing Adult Twig Girdlers (Cerambycidae: Lamiinae: Onciderini)
Home   ¦   Twig Girdlers   ¦   Key to Genera   ¦   Genus Fact Sheets   ¦   Gallery   ¦   Morphological Atlas   ¦   Glossary   ¦   References   ¦   About


Previous Genus       Next Genus

Genus: Cnemosioma

Diagnostic Features
  • Description: Elongate-ovate, moderate-sized, ranging from about 14–18 mm in length. Integument generally dark brown with whitish and ochraceous pubescence. Head with frons elongate, about as wide as width of 1 1/2 lower eye lobes. Eyes with lower lobes ovate. Genae elongate, about as tall to distinctly taller than lower eye lobes. Antennal tubercles prominent, moderately to narrowly separated; tubercles not armed at apex; antennae about as long or 1 1/3 times as long as overall body length; scape clavate, about as long or longer than antennomere IV; antennomere III sinuate, longer than scape and antennomere IV. Pronotum transverse, roughly conical, distinctly wider at base, without lateral tubercles. Elytra with sides strongly attenuate; elytral apices individually rounded; elytra generally uniform in coloration or speckled; base of elytra with two large, prominent tubercles at humeri; each tubercle rounded, about the size of one lower lobe of eye. Basal 1/3 of elytra with dense punctation, surface granulate-punctate. Procoxae simple, without projection (females). 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: conical pronotum without lateral tubercles; base of elytra with two large, prominent tubercles at humeri; and elytra with sides strongly attenuate.

  • Similar genus/genera: superficially resembles Agaritha, some species of Hypsioma, and Typhlocerus.
Geographic Distribution
  • South America (Brazil)
Host Plants/Trees
  • Unknown
Girdling Behavior
  • Unknown
Notes

The genus Cnemosioma currently contains one species:
  Cnemosioma innominata Martins, 1975 [♀ specimen]
  Cnemosioma innominata Martins, 1975 [holotype specimen, ♀]
  • This species is rare in collections.

    Generic Synonymies
    • None
    Selected References
     

    Cnemosioma innominata
    ♀ 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.