Sphenophorus aequalis, the clay-coloured billbug, is a species of beetle in the family Dryophthoridae. It is found in North America.

Subspecies

These five subspecies belong to the species Sphenophorus aequalis:

  • Sphenophorus aequalis aequalis Gyllenhal, 1838
  • Sphenophorus aequalis ochreus
  • Sphenophorus aequalis pictus
  • Sphenophorus aequalis scirpi Chittenden
  • Sphenophorus aequalis univitta Chittenden

Further reading

  • Lobl, I.; Smetana, A., eds. (2013). Catalogue of Palaearctic Coleoptera, Volume 7: Curculionoidea I. Apollo Books. ISBN 978-90-04-26093-1.
  • Lobl, I.; Smetana, A., eds. (2013). Catalogue of Palaearctic Coleoptera, Volume 8: Curculionoidea II. Apollo Books. ISBN 978-90-04-25916-4.