minute seed weevil

(Ceutorhynchus spp.)

               
Overview

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.

minute seed weevil (Ceutorhynchus sp.)

  Photo by Alfredo Colon
   
Identification

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: 24, 27, 29, 30, 82.

 
Comments

 

 
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 (snout beetles, 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 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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Alfredo Colon
       
  minute seed weevil (Ceutorhynchus sp.)    
       
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Alfredo Colon
8/2/2019

Location: Woodbury, MN

minute seed weevil (Ceutorhynchus sp.)


     
     
 
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Created: 12/8/2020

Last Updated:

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