Andricus caepula
Feron caepula
This record describes Feron caepula (species). Recorded family: Cynipidae. Recorded order: Hymenoptera.
Identification and Appearance

This species induces vase shaped galls on Quercus turbinella and oblongifolia. The galls are reddish-yellow when young and turn brown with age, and are always covered by long, bristle-like hairs.
Classification
- Kingdom
- Animalia
- Phylum
- Arthropoda
- Class
- Insecta
- Order
- Hymenoptera (Ants, Bees, Wasps and Sawflies)
- Superfamily
- Cynipoidea
- Family
- Cynipidae (Gall Wasps)
- Tribe
- Cynipini
- Genus
- Feron
Imported taxonomy record. Source availability varies; see the source references and editorial policy below.
Habitat and Range
Geographic Range
Southwestern USA, likely throughout host ranges.
About Flies: the wider group
Order-level background for Hymenoptera, the group containing Feron caepula. Species-specific details appear above.
Group overview
Hymenoptera includes over 150,000 described species of ants, bees, wasps, and sawflies. Earth harbors approximately 20 quadrillion (20×10^15) ants, with a combined biomass of ~12 megatons of dry carbon - exceeding the combined biomass of all wild birds and mammals (PNAS, 2022).
Ecological role of the group
About 35% of the world's food crops depend on animal pollinators. The chocolate industry, valued at over $100 billion, depends on pollinating flies and midges. Ants are the dominant soil engineers in most terrestrial ecosystems, turning more soil than earthworms in many habitats.
Economic and practical significance of the group
Pollinators contribute $235-577 billion worth of annual global food production (FAO). In the U.S., bee pollination alone benefits crops valued at $18 billion annually, and honey bees are responsible for $5.4 billion in agricultural productivity. Between April 2023-2024, 55.1% of managed honey bee colonies were lost. The U.S. bee population dropped from 5 million to 2.5 million.
Recorded sources for this group: FAO, USDA, EPA, PNAS (2022), US Fish & Wildlife Service. Imported estimates may describe particular regions or reporting periods.
Frequently Asked Questions About Andricus caepula
What is Andricus caepula?
Andricus caepula (Feron caepula) is a species in the family Cynipidae, within the order Hymenoptera.
How do you identify Andricus caepula?
This species induces vase shaped galls on Quercus turbinella and oblongifolia. The galls are reddish-yellow when young and turn brown with age, and are always covered by long, bristle-like hairs.
Where is Andricus caepula found?
Range: Southwestern USA, likely throughout host ranges.
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