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

Diagnostic Features
  • Description: Elongate-ovate, robust, small to large-sized, ranging from about 11–21 mm in length. Integument generally dark brown or black with whitish, ferrugineous, black, and ochraceous pubescence. Head with frons elongate, about as wide as width of three lower eye lobes. Eyes with lower lobes ovate-oblong. Genae elongate, about as tall or distinctly taller than lower eye lobes. Antennal tubercles prominent, moderately to narrowly separated; tubercles not armed at apex or armed with a small projection, or with a short, blunt horn, or with a moderately long, acute horn; antennae about as long as overall body length, or as much as twice as long; scape clavate, about as long or shorter than antennomere IV; antennomere III curved or sinuate, longer than scape and antennomere IV. Pronotum transverse, roughly 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 or transverse ridges at humeri. Basal 1/3 of elytra with sparse to dense punctation, surface finely punctate, coarsely punctate or granulate-punctate. Procoxae without projection 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: distinctly small eyes, widely separated; elytra with sides strongly attenuate; and base of elytra with two prominent tubercles or transverse ridges at humeri.

  • Similar genus/genera: strongly resembles Delilah, Hypsioma, and Typhlocerus.
Geographic Distribution
  • South America (Brazil, Venezuela)
Host Plants/Trees
  • Unknown
Girdling Behavior
  • Unknown
Notes

The genus Lesbates currently contains five species
  Lesbates acromii (Dalman, 1823) [♂ specimen]
  Lesbates axillaris (Thomson, 1860) [type specimen]
  Lesbates carissima Dillon & Dillon, 1945 [paratype specimen, ♀]
  Lesbates caviunas (Dillon & Dillon, 1949) [holotype specimen, ♀]
  Lesbates milleri Nearns & Swift, 2011 [holotype specimen, ♂]

Generic Synonymies
  • The type species of this genus was originally described in the genus Lamia; the genus Truncatoides was synonymized with Lesbates.
Selected References
 

Lesbates acromii
♂ 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.