oak gall wasp

(Amphibolips cookii)

               
Conservation Status

IUCN Red List

not listed

oak gall wasp (Amphibolips cookii)

NatureServe

not listed

Minnesota

not listed

Occurrence

 

Flight/Season

 

Habitat/Hosts

Northern red oak, black oak

Size

Gall: 7 16 to 1 (11 to 25 mm) in diameter

         
         
         
         
          Photo by Pat
 
Identification

Amphibolips cookii is an oak gall wasp. It occurs in the eastern United States from Maine to Minnesota south to Virginia and Iowa. It is usually identified by the gall it produces. The gall appears protruding from a leaf bud of a northern red oak or black oak. The fully developed gall is round, 7 16 to 1 (11 to 25 mm) in diameter, green, and moderately covered with small red spots. Each spot covers a low, rounded bump (nipple). The outer walls of the gall are moderately thick. The larval cell in the center of the gall is small. It is supported by filaments radiating in all directions from the cell to the gall walls. The gall turns brown and wrinkles when it dries. It drops off the tree in September to October.

 
Similar
Species

 

 
Larval Food

 

 
Adult Food

 

 
Life Cycle

 

 
Behavior

 

 
Distribution Distribution Map  

Sources: 30, 82.

 
Comments

No Common Name
This species has no common name. The common name for the tribe Cynipini is oak gall wasps, and is applied here for the sake of convenience.

 
Taxonomy

Order:

Hymenoptera (ants, bees, wasps, and sawflies)

 

Suborder:

Apocrita (ants, bees, true wasps)

 

Infraorder:

Terebrantes

 

Superfamily:

Cynipoidea (gall wasps)

 

Family:

Cynipidae (gall wasps)

 

Subfamily:

Cynipinae

 

Tribe:

Cynipini (oak gall wasps)

 
Synonyms

 

 
Common
Names

no common name

 

 

 

 

 

 

 

Glossary

Gall

An abnormal growth on a plant produced in response to an insect larva, mite, bacteria, or fungus.

 

 

 

 

 

       
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Pat
       
  oak gall wasp (Amphibolips cookii)   oak gall wasp (Amphibolips cookii)
       
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Pat
8/22/2017

Location: Taconic State Park, upstate New York

oak gall wasp (Amphibolips cookii)


 
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Created: 1/16/2020

Last Updated:

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