linden wart gall midge

(Contarinia verrucicola)

               
Conservation Status

IUCN Red List

not listed

linden wart gall midge

NatureServe

not listed

Minnesota

not listed

Occurrence

 

Flight/Season

 

Habitat/Hosts

American basswood and European lindens

Size

Total Length: 132 (1.25 mm)

 
 
Identification

There are 312 species of Contarinia worldwide. Adults are very small, 132 (1.25 mm) long, and impossible to identify in the field. These midges are best identified by by the shape of the galls they produce and the plant species on which they are found.

Linden wart gall midge is a specialized plant feeder. It is found in the United States from New Hampshire to Minnesota, south to New Jersey and Iowa, and in New Brunswick and Ontario, Canada. In Minnesota it can be found on American basswood and littleleaf linden. The galls appear on leaves in the spring. They are small, round, wart-like or beebee-like, and raised on both the upper and lower leaf surfaces.

 
Similar
Species

Lime nail gall mite (Eriophyes tiliae) creates raised, finger-like galls on the upper leaf surface.

 
Larval Food

In Minnesota, American basswood and littleleaf linden.

 
Adult Food

 

 
Life Cycle

Mature larvae drop to the ground and overwinter in the soil. Adults emerge in the spring.

 
Behavior

 

 
Distribution Distribution Map  

Sources:, 7, 29, 30.

 
Comments

 

 
Taxonomy

Order:

Diptera (gnats, mosquitoes, true flies)

 

Suborder:

Nematocera (long-horned flies)

 

Infraorder:

Bibionomorpha

 

Superfamily:

Sciaroidea (fungus gnats and gall midges)

 

Family:

Cecidomyiidae (gall gnats, gall midges, cécidomyidés)

 

Subfamily:

Cecidomyiinae (gall midges)

 

Supertribe:

Cecidomyiidi

 

Tribe:

Cecidomyiini

 

Genus:

Contarinia

 
Synonyms

 

 
Common
Names

linden wart gall midge

 

 

 

 

 

 

 

 

 

 

       
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Leaf Upperside

  linden wart gall midge    
       

Leaf Underside

  linden wart gall midge    
       

 

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slideshow

       
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MinnesotaSeasons.com Sightings
         

 

 

Binoculars


Created: 2/13/2020

Last Updated:

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