Caryomyia caryaecola
(Osten Sacken, 1862)
Hickory Onion Gall Midge
Caryomyia caryaecola, commonly known as the hickory onion , is a -inducing in the . The is specialized on hickory trees (Carya species), forming distinctive galls on foliage. As a member of the Caryomyia, it belongs to a radiation of gall midges associated with hickory and pecan.
Pronunciation
How to pronounce Caryomyia caryaecola: //ˌkɛəriˈoʊmiə ˌkɛər.jiˈɛkoʊlə//
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Identification
The is recognized by its association with the characteristic "onion " structure on hickory leaves—rounded, often clustered galls that resemble small onions. are minute with reduced typical of . Specific morphological features distinguishing C. caryaecola from require examination of adult or larval .
Images
Habitat
Deciduous forests and woodlands where hickory trees (Carya ) occur. The species is tied to the presence of its plants rather than specific abiotic conditions.
Distribution
Eastern North America, corresponding to the range of hickory in the Carya.
Diet
feed on tissue within induced on hickory leaves. The exact nutritional relationship—whether the feeds on plant tissue directly, on gall tissue, or on associated fungal or microbial growth within the gall—has not been definitively established.
Host Associations
- Carya - Forms on hickory foliage; specific Carya not definitively documented in available sources
Ecological Role
As a inducer, the modifies tissue to create a protected microhabitat for larval development. Galls may influence leaf and plant resource allocation, though specific impacts on hickory are not well documented.
Similar Taxa
- Caryomyia tubicolaAlso induces on hickory; distinguished by gall (tubular vs. onion-shaped) and morphological features
- Other Caryomyia speciesMultiple occur on Carya; precise identification requires detailed examination of or