elm finger gall mite

(Aceria parulmi)

Conservation Status
elm finger gall mite
  IUCN Red List

not listed

     
  NatureServe

not listed

     
  Minnesota

not listed

     
           
           
           
           
           
           
           
 
Description
 
 

Aceria is a genus of tiny mites. They are so small that they are almost impossible to see with the naked eye. Unless a scanning electron microscope is available, a morphological description of an adult individual is useless. However, many mites can be easily identified by the shape of the galls they produce and the plant species on which they are found.

Elm finger gall mite is a specialized plant feeder. It can be found on American elm and possibly on other elms.

Elm finger gall mite produces elongated, slender, yellowish-green, finger-like galls on the upper surface of the leaves. The galls are solitary – they do not coalesce into larger galls. They occur singly, mostly along the midrib but also along secondary veins. Sometimes they crowd in the angles between the midrib and the secondary veins.

 
     
 

Size

 
 

Tiny, almost microscopic

 
     
 

Similar Species

 
     
     
 
Habitat and Hosts
 
 

American elm (Ulmus americana) and possibly other elms

 
     
 
Biology
 
 

Season

 
 

 

 
     
 

Life Cycle

 
 

 

 
     
 
Distribution
 
 

Distribution Map

 

Sources

7, 24, 27, 29, 30.
 
  5/18/2021      
         
 

Occurrence

 
 

Common

 
         
 
Taxonomy
 
  Class Arachnida (arachnids)  
  Subclass Acari (mites and ticks)  
  Superorder Acariformes (mites)  
 

Order

Trombidiformes  
 

Suborder

Prostigmata  
  Infraorder Eupodina  
 

Superfamily

Eriophyoidea  
 

Family

Eriophyidae (gall and rust mites)  
 

Subfamily

Eriophyinae  
 

Tribe

Eriophyini  
 

Genus

Eriophyes  
       
 

Synonyms

 
 

Eriophyes parulmi

 
       
 

Common Names

 
 

elm finger gall mite

 
       

 

 

 

 

 

 

 

 

 
 
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    elm finger gall mite   elm finger gall mite  
           

 

Camera

     
 
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