minute seed weevil

(Ceutorhynchus spp.)

Overview

 

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Ceutorhynchus is a very large genus of very small weevils. It is the largest genus of minute seed weevils (subfamily Ceutorhynchinae). They occur across Europe and North America. There are at least 400 described Ceutorhynchus species worldwide, 68 species in North America north of Mexico, and at least 7 species in Minnesota.

Adults are active in the spring and summer. They are found mostly on plants in the mustard (Brassicaceae) family.

     
 

A few are agricultural pests, harming seed crops of cabbage, turnip, and rutabaga. The cabbage seedpod weevil (Ceutorhynchus obstrictus) is a serious pest of canola and oilseed rape in North America.

 
     
 
Description
 
 

Adults are very small, 116to (2 to 4 mm) in length. The beak-like projection of the head containing the mouthparts (rostrum) is slender, curved, and very long, about half as long as the body. The antennae have 11 segments and are elbowed and clubbed. The last part of the leg (tarsus), corresponding to the foot, has 5 segments. At the end of the last tarsal segment there are two claws.

 
     
 
Distribution
 
 

Distribution Map

 

Sources

27, 29, 30, 82.

 
  1/24/2021      
         
 
Taxonomy
 
 

Order

Coleoptera (beetles)  
 

Suborder

Polyphaga (water, rove, scarab, long-horned, leaf, and snout beetles)  
 

Infraorder

Cucujiformia  
 

Superfamily

Curculionoidea (snout and bark beetles)  
 

Family

Curculionidae (true weevils)  
 

Subfamily

Ceutorhynchinae (minute seed weevils)  
 

Tribe

Ceutorhynchini  
       
 

Subordinate Taxa

 
 

American weevil (Ceutorhynchus americanus)

cabbage curculio (Ceutorhynchus rapae)

cabbage seedpod weevil (Ceutorhynchus obstrictus)

minute seed weevil (Ceutorhynchus neglectus)

minute seed weevil (Ceutorhynchus pusio)

minute seed weevil (Ceutorhynchus squamatus)

minute seed weevil (Ceutorhynchus typhae)

minute seed weevil (Ceutorhynchus zimmermanni)

 
       
 

Synonyms

 
 

 

 
       
 

Common Names

 
 

This genus has no common name. The common name for the family Curculionidae is minute seed weevils, and it is applied here for convenience.

 
       

 

 

 

 

 

 

 

Glossary

Rostrum

The stiff, beak-like projection of the carapace or prolongation of the head of an insect, crustacean, or cetacean.

 

 

 

 

 

 
 
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Created: 12/8/2020

Last Updated:

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