Gargara genistae
(Fabricius, 1775)
Gargara genistae is a small in the Membracidae, Centrotinae, characterized by a prominent backward-projecting pronotum and dark brown coloration. The is oligophagous, feeding exclusively on phloem sap of shrubby Fabaceae including brooms and related . It is widely distributed across the Holarctic, Ethiopian, and Oriental regions, with occasional records in North America as an apparent introduction. Males produce species-specific substrate-borne calling signals used for mate recognition; cryptic species within this group are distinguished by acoustic rather than morphological characters.
Pronunciation
How to pronounce Gargara genistae: /ɡarˈɡaːra ɡeˈnɪstae/
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Identification
Distinguished from the similar Centrotus cornutus by smaller size (3–5 mm vs. larger), absence of lateral ear-shaped outgrowths, and more slender, straight pronotal projection. Within the Gargara genistae group, cryptic species are morphologically nearly identical and require analysis of male calling signal patterns for reliable identification.
Images
Appearance
Dark brown body, 3–5 mm in length. The pronotum is prominent, finely haired, curved upward, and extends backward into a long, straight projection. Forewings are brownish translucent with light brown venation. Unlike the larger Centrotus cornutus, lacks lateral ear-shaped outgrowths on the .
Habitat
Predominantly dry in sunny to semi-shady, often warm locations. Associated with shrubby Fabaceae plants.
Distribution
Widespread in the Holarctic (excluding Northern Europe), Ethiopian, and Oriental regions. Recorded in Russia, Kazakhstan, Central Asia, Turkey, Italy, and occasionally in North America as an apparent introduction.
Diet
Phloem sap from vascular tracts of shrubby Fabaceae. Documented include Ononis, Genista, Colutea, Coronilla, Glycyrrhiza, and Caragana.
Host Associations
- Genista - primary referenced in specific epithet
- Ononis -
- Colutea -
- Coronilla -
- Glycyrrhiza -
- Caragana -
Behavior
Feeds using to extract phloem sap. Excretes excess fluid as honeydew. Males produce substrate-borne pure-tone calling signals for recognition and mate attraction. is the primary mechanism for distinguishing cryptic species within the group.
Ecological Role
Phloem feeder on Fabaceae; honeydew production may support associated insects. Oligophagous specialization on leguminous shrubs.
Human Relevance
Occasionally introduced to North America; no documented economic or agricultural significance.
Similar Taxa
- Centrotus cornutusSimilar pronotal projection but significantly larger, with distinctive lateral ear-shaped outgrowths on absent in G. genistae
- Gargara spp. (genistae species group)Cryptic within Russia and Central Asia are morphologically nearly identical; distinguished by male calling signal patterns rather than external appearance
More Details
Cryptic species and acoustic divergence
The Gargara genistae group in Russia, Kazakhstan, and Central Asia contains at least three cryptic species that are almost indistinguishable by external and male genitalia shape. Species divergence in this group appears driven by on male calling signal patterns, representing a case of acoustic speciation in treehoppers.
Taxonomic note
iNaturalist incorrectly describes this as a ''; it is a ( Membracidae), not a cicada (family Cicadidae).