Cheiloneurus

Westwood, 1833

parasitic wasp

Cheiloneurus is a of parasitic in the Encyrtidae. within this genus function primarily as hyperparasitoids, attacking other wasps that develop within scale insects, mealybugs, and other hemipteran . The genus is characterized by distinctive morphological features including a group of coarse bristles at the apex of the scutellum and a long on the fore wings. Cheiloneurus species have been recorded from multiple continents including Asia, Europe, North America, and South America, with some species being utilized or studied for applications.

Cheiloneurus amplicornis by the Smithsonian. Used under a CC0 license.

Pronunciation

How to pronounce Cheiloneurus: /kaɪˌloʊˈnʊərəs/

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Identification

Cheiloneurus can be distinguished from other Encyrtidae by the presence of coarse bristles at the apex of the scutellum and the long of the fore wings. Species-level identification relies on wing infuscation patterns, coloration (particularly the 5th funicular segment in females), and other subtle morphological characters. For example, C. claviger females show incomplete infuscation of the fore wings and have only the 5th funicular segment blackish.

Images

Habitat

Agricultural and natural environments where scale insects (Coccidae) and mealybugs (Pseudococcidae) occur; olive groves, pistachio orchards, and other settings with hemipteran .

Distribution

Recorded from Bihar (India), Bolivia, California, Florida, Western Australia, Greece (Corfu), Italy, Iran, and China. The has a distribution with described from multiple biogeographic regions.

Host Associations

Saissetia oleae - indirect (via Metaphycus lounsburyi) insect of primary
Metaphycus lounsburyi - primary /hyperparasitoid targetprimary of Saissetia oleae
Kermes spp. - indirect reported from Italy, via other on Pinoideae
Kermania pistaciella - indirect pistachio , via primary Chelonus kermakiae
Chelonus kermakiae - primary /hyperparasitoid targetbraconid of Kermania pistaciella
Phenacoccus solenopsis - indirect cotton mealybug, of primary attacked by Cheiloneurus

Behavior

Hyperparasitoid : females oviposit into primary that are developing within their hemipteran . emerge from parasitized hosts after . Some show gregarious development. Host selection behavior is influenced by physical characteristics of the host and prior host deprivation.

Ecological Role

Hyperparasitoid in parasitic complexes of scale insects and mealybugs; can potentially limit of primary used in . Population levels are typically low relative to primary parasitoids, suggesting limited impact in most systems. Some may be introduced or in new regions.

Human Relevance

Studied for applications and as potential limiting factors for primary effectiveness. Some may interfere with biological control programs by attacking beneficial primary parasitoids. New species continue to be described from economically important agricultural systems.

Similar Taxa

MetaphycusBoth are Encyrtidae associated with scale insects; Cheiloneurus attacks Metaphycus as hyperparasitoid, while Metaphycus is a primary
CoccophagusBoth Encyrtidae associated with coccid ; Cheiloneurus distinguished by scutellar bristles and wing venation
ProchiloneurusRelated encyrtid with similar ; distinguished by morphological characters including antennal structure and wing venation