Ironclad ID: Tool for Diagnosing Ironclad and Cylindrical Bark Beetles (Coleoptera: Zopheridae) of North America north of Mexico
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Genus: Stephaniolus

Diagnostic Features
  • Description: Antennae 11-segmented with a distinct, 2-segmented club. Antennal setation sparse. Subantennal grooves/depressions present, open internally. Eyes small, reduced, coarsely faceted. Pronotal disc simple. Procoxal cavities open. Metacoxae moderately separated, separation slightly less than metacoxal length. Elytra with distinct striae composed of coarse, nearly confluent punctures. Tarsal formula 4-4-4. Dorsal surface sparsely covered with hair-like setae.
  • Similar genera: The genus Stephaniolus is similar to the genera Coxelus and Megataphrus in having reduced eyes and wings absent. The distinctive antennal cavities on the hypomeron serve to distinguish Megataphrus, and the absence of subantennal grooves serve to distinguish Coxelus.
Known Distribution
  • Southwestern United States (SE AZ). High-elevation mountains.
Probable Distribution
  • Southwestern United States (NM). High-elevation mountains.
  • Members of this genus have been found on the bark of old pine stumps.

  • Abundance: Rarely encountered.
North American Species (1)

Stephaniolus longus (Stephan, 1989)

Selected References  

Stephaniolus longus
© N.P. Lord


© 2011-2015 Lord, N.P., Nearns, E.H., and K.B. Miller
The University of New Mexico and Center for Plant Health Science and Technology, USDA, APHIS, PPQ.