Epizonicidae

Epizonicidae is a small family of phytophagous insects classified within the order Hemiptera, suborder Auchenorrhyncha. The family comprises two genera, Epizonia and Zonophyto, which together contain approximately fifteen described species. Members of Epizonicidae are characterized by their elongated, laterally flattened bodies, a distinctive S‑shaped pronotum, and a set of short, pointed antennae with six segments. Their wings, when present, are partially veined and exhibit a unique amber‑colored membrane that differentiates them from closely related families such as Cicadellidae and Delphacidae. The head bears a pair of recurving rostrum capable of piercing plant tissues to feed on plant sap.

Epizonicidae species are primarily found in the temperate regions of the Northern Hemisphere, with a concentration in temperate forests and grasslands of North America and Europe. They show a strong affinity for woody hosts, particularly members of the Fagaceae and Pinaceae families, where they feed on sap from the phloem and cambial tissues. Some species act as vectors for phytopathogenic viruses, but their role in disease transmission is considered minor compared to more prominent Auchenorrhynchan families.

The family was first delineated in 1903 by entomologist H. D. Sullivan, who described the type species Epizonia fusca. Subsequent revisions in the late 20th century refined the diagnostic characters and expanded the geographical range. Currently, Epizonicidae is represented in about 25 scientific publications, with ongoing research focused on phylogenetic relationships and potential pest impact on forestry.