Proconiini

Sharpshooters can be distinguished from other Cicadellidae by their large body size relative to other leafhoppers, robust build, and the presence of closely spaced rows of fine spines on the hind legs. Species-level identification relies on male genitalia morphology and, in females, egg brochosome characteristics—ultramicroscopic reticulate lipoprotein bodies with species-specific structural types (spherical, filiform, or fusiform). Some genera exhibit sexual dimorphism and intraspecific color variation that complicates visual identification.

Diverse habitats from sea level to 4,000 m elevation, including tropical and subtropical forests, agricultural landscapes, and anthropically-modified environments. High Andean cloud forests harbor brachypterous species adapted to extreme conditions. Six genera are restricted to Paraná Forest (evergreen forest, 500–1,800 m elevation). Vineyard and citrus orchard ecosystems in Brazil and Argentina support multiple pest species.

Strictly New World distribution. Documented from Canada through Argentina, with highest diversity in Neotropical regions. Argentina records 40 species in two primary zones: northeastern-mideastern and northwestern-midwestern strips north of 40°S latitude. Brazilian records include Serra Gaúcha region (Rio Grande do Sul) and Pará State (Amazonian region). Southernmost records: Tapajosa rubromarginata and T. doeringi.

Xylem-feeding; polyphagous with documented host plants spanning 24 plant families including Rutaceae (citrus), Vitaceae (grapes), Rosaceae (almonds, peach, plum), Rubiaceae (coffee), Fabaceae, Poaceae, and others. Host-switching behavior maximizes nutrient uptake from dilute xylem sap.

Production of egg brochosomes—ultramicroscopic, reticulate, lipoprotein bodies synthesized by Malpighian tubules and stored as convex masses on the forewings. Females use macrobristles on metathoracic tibiae to transfer brochosomes onto egg masses or oviposition scars, potentially signaling previous oviposition to conspecifics. Rapid, directed flight patterns characteristic of the group.

Major vectors of Xylella fastidiosa, transmitting: Citrus Variegated Chlorosis (CVC), Pierce's Disease of grapes (PD), Almond Leaf Scorch (ALS), Phony Peach Disease (PPD), Plum Leaf Scald (PLS), and Coffee Leaf Scorch (CLS). Eggs serve as hosts for parasitoid wasps (Mymaridae, Trichogrammatidae) and predators (Dermaptera), contributing to local food webs.

Significant agricultural pests threatening citrus, grape, almond, and coffee industries worldwide. Biological control programs target egg parasitoids (Gonatocerus spp. and other Mymaridae) for management of glassy-winged sharpshooter (Homalodisca vitripennis) and related species. Quarantine and classical biological control efforts ongoing in California and other regions to prevent Xylella fastidiosa establishment.

• CicadelliniBoth are tribes within Cicadellinae; Proconiini distinguished by larger body size, xylem-feeding specialization, egg brochosome production, and more robust hind leg spination. Cicadellini generally lack brochosomes and exhibit different host associations.
• DeltocephalinaeSubfamily of Cicadellidae with smaller, more gracile body form; phloem-feeding rather than xylem-feeding; lack the distinctive brochosome system and large size characteristic of Proconiini.

• leafhopper
• sharpshooter
• xylem-feeder
• vector
• Xylella fastidiosa
• brochosome
• egg parasitoid
• biological control
• New World
• agricultural pest

• BugGuide
• iNaturalist taxon
• NCBI Taxonomy
• Catalogue of Life
• Publications | Entomology Research Museum
• Egg Brochosomes of Proconiini (Hemiptera: Cicadellidae, Cicadellinae) species associated with cultivation of grapevines
• New records of Proconiini Stål, 1869 (Hemiptera: Cicadellidae: Cicadellinae) from Pará State, Brazil
• Proconiini Sharpshooters of Argentina, with Notes on Its Distribution, Host Plants, and Natural Enemies
• Short-winged mysteries from Andean cloud forests: a new genus and two new species of brachypterous sharpshooters (Hemiptera: Cicadellidae: Cicadellinae: Proconiini) from Colombia
• Tretogonia Melichar (Hemiptera: Cicadellidae: Proconiini): two new species from South Brazil and a description of T. dentalis Emmrich, 1988
• Species delimitation and taxonomic revision of Abana Distant, 1908 (Hemiptera: Cicadellidae: Proconiini): Intraspecific color variation and pseudocryptic diversity in Andean sharpshooters
• Brochosomes-for-eggs of the Proconiini (Hemiptera: Cicadellidae, Cicadellinae) species associated with orchards of Citrus sinensis (L.) Osbeck in Rio Grande do Sul, Brazil
• New Records on the Geographical Distribution of South American Sharpshooters (Cicadellidae: Cicadellinae: Proconiini) and their Potential as Vectors ofXylella fastidiosa
• Egg Parasitoids of Proconiini (Hemiptera: Cicadellidae) in Northwestern Mexico, with Description of a New Species ofGonatocerus(Hymenoptera: Mymaridae)
• Spatial and seasonal distribution of egg parasitoids of the sharpshooter Tapajosa rubromarginata (Hemiptera: Cicadellidae: Proconiini) on feral Johnson grass and commercial citrus host in Argentina