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

Diagnostic Features
  • Description: Elongate-oblong, moderate-sized, ranging from about 13–15 mm in length. Integument generally dark brown or ferrugineous with whitish, ferrugineous, and ochraceous pubescence. Head with frons subquadrate to elongate, about as wide as width of two lower eye lobes. Eyes with lower lobes ovate. Genae elongate, about as tall as lower eye lobes. Antennal tubercles prominent, widely separated; tubercles not armed at apex or armed with a small projection; antennae about as long as overall body length, or as much as 1 1/2 times as long; scape clavate, about as long as antennomere IV; antennomere III sinuate, longer than scape and antennomere IV. Pronotum transverse, roughly cylindrical, without lateral tubercles. Elytra with sides roughly parallel; elytral apices individually rounded; elytra generally uniform in coloration or speckled, or with distinct maculae; base of elytra with without tubercles or with two prominent tubercles at humeri. Basal 1/3 of elytra with moderate to dense punctation, surface coarsely punctate to granulate-punctate. Procoxae without projection or with small acute projection. Mesosternal process with apex feebly emarginate. Metafemora moderate in length, about 1/3 as long as elytra.

  • The combination of the following characters will help to distinguish this genus: roughly cylindrical pronotum, without lateral tubercles; sinuate antennomere III; and elytra with sides roughly parallel.

  • Similar genus/genera: strongly resembles Pseudobeta and superficially resembles Esonius and Eudesmus.
Geographic Distribution
  • South America (Argentina, Bolivia, Brazil, Paraguay)
Host Plants/Trees
  • Unknown
Girdling Behavior
  • Unknown
Notes

The genus Midamiella currently contains two species:
  Midamiella hecabe (Dillon & Dillon, 1945) [♀ specimen]
  Midamiella hecabe (Dillon & Dillon, 1945) [holotype specimen, ♂]
  Midamiella santaremensis (Dillon & Dillon, 1945)
  • Penteado-Dias (1979) illustrated the larval and pupal stages of Midamiella hecabe.

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

    Midamiella hecabe
    ♀ 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.