HemipteraCicadellidae – Typical Leafhoppers

Idiocerus exilus

This record describes Idiocerus exilus (species). Recorded family: Cicadellidae. Recorded order: Hemiptera.

Identification and Appearance

FeatureDescription
Additional detailsResembling catalinus in general appearance, but lighter in color, male antennal disc long, and with distinctly different genitalia. Vertex evenly rounded, nearly same length in middle as near eyes. Postclypeus longer than wide; anteclypeus longer than wide, nearly parallel margined. Male antennae with a long thin disc, and base also expanded and flattened ventrally.
ForewingForewing flaring, with a large appendix. Color. - Vertex of male yellow with two large black spots about their own width from eyes. Venex of female same as male except also monied with brown. Face of male yellow, with a bright yellow band down median line, a brown band through each gena, and antennal disc and basal expansion black. Face of female yellow mottled with brown.
PronotumPronotum yellow mottled with brown, with a few dark spots along anterior margin. Scutellum yellow with dark brown triangles.
ForewingForewing yellow with brown veins interrupted with yellow. Male genitalia. - Plate short, thin, wider near apex. Pygofer short with a bluntly rounded apex. Style narrowing to a nearly pointed apex, with several large combined spines near apex. Connective shaped like an inverted T, with a pointed ventral projection. Aedeagus small, with shaft narrowing to a flattened apex, gonopore at base of flattened area, a short process on each side of shaft just basal to gonapore; apodeme greatly enlarged at apex, with a dorsal expansion. Female genitalia. - Ovipositor short, extending about twice its own width beyond pygofer. Pygofer short, nearly rounded. Posterior margin of seventh sternum broadly rounded with a median emargination. This species has a remarkable disc-like expansion on the ventral side of the base of the male antennae and this alone will separate it from all others of the genus. (Freytag, 1965)

Classification

Kingdom
Animalia
Phylum
Arthropoda
Class
Insecta
Order
Hemiptera (True Bugs, Cicadas, Hoppers, Aphids and Allies)
Suborder
Auchenorrhyncha
Superfamily
Membracoidea
Family
Cicadellidae (Typical Leafhoppers)
Subfamily
Eurymelinae
Tribe
Idiocerini
Genus
Idiocerus

Imported taxonomy record. Source availability varies; see the source references and editorial policy below.

Habitat and Range

Geographic Range

Arizona (type locality: Chiricahua Mts)

Diet and Behavior

Diet: "white willow"

Additional species information

Species notes from the sources

Etymology: Idiocerus exilus Freytag, 1965

About True Bugs, Cicadas, Hoppers, Aphids and Allies: the wider group

Order-level background for Hemiptera, the group containing Idiocerus exilus. Species-specific details appear above.

Group overview

Hemiptera (true bugs) includes over 80,000 described species across cicadas, aphids, leafhoppers, shield bugs, and bed bugs. Aphids alone cost global agriculture an estimated $2.5 billion annually in crop losses.

Ecological role of the group

Many Hemiptera are essential food sources for birds and predatory insects. Cicadas provide massive nutrient pulses during emergence events - a single Brood X emergence can involve trillions of individuals across 15 states.

Economic and practical significance of the group

The brown marmorated stink bug (Halyomorpha halys) caused $37 million in apple crop losses in a single year in the U.S. Mid-Atlantic region. Bed bug infestations in the U.S. increased by 500% between 2001-2010, costing the hotel industry hundreds of millions annually.

Recorded sources for this group: USDA, EPA, University research. Imported estimates may describe particular regions or reporting periods.

Explore Hemiptera families and species →

Frequently Asked Questions About Idiocerus exilus

What is Idiocerus exilus?

Idiocerus exilus is a species in the family Cicadellidae, within the order Hemiptera.

How big is Idiocerus exilus?

4.1-4.3mm

How do you identify Idiocerus exilus?
FeatureDescription
Additional detailsResembling catalinus in general appearance, but lighter in color, male antennal disc long, and with distinctly different genitalia. Vertex evenly rounded, nearly same length in middle as near eyes. Postclypeus longer than wide; anteclypeus longer than wide, nearly parallel margined. Male antennae with a long thin disc, and base also expanded and flattened ventrally.
ForewingForewing flaring, with a large appendix. Color. - Vertex of male yellow with two large black spots about their own width from eyes. Venex of female same as male except also monied with brown. Face of male yellow, with a bright yellow band down median line, a brown band through each gena, and antennal disc and basal expansion black. Face of female yellow mottled with brown.
PronotumPronotum yellow mottled with brown, with a few dark spots along anterior margin. Scutellum yellow with dark brown triangles.
ForewingForewing yellow with brown veins interrupted with yellow. Male genitalia. - Plate short, thin, wider near apex. Pygofer short with a bluntly rounded apex. Style narrowing to a nearly pointed apex, with several large combined spines near apex. Connective shaped like an inverted T, with a pointed ventral projection. Aedeagus small, with shaft narrowing to a flattened apex, gonopore at base of flattened area, a short process on each side of shaft just basal to gonapore; apodeme greatly enlarged at apex, with a dorsal expansion. Female genitalia. - Ovipositor short, extending about twice its own width beyond pygofer. Pygofer short, nearly rounded. Posterior margin of seventh sternum broadly rounded with a median emargination. This species has a remarkable disc-like expansion on the ventral side of the base of the male antennae and this alone will separate it from all others of the genus. (Freytag, 1965)
Where is Idiocerus exilus found?

Range: Arizona (type locality: Chiricahua Mts)

What does Idiocerus exilus eat?

The diet of the Idiocerus exilus includes white willow.