dogwood twig borer

(Oberea tripunctata)

Conservation Status
dogwood twig borer
Photo by Alfredo Colon
  IUCN Red List

not listed

     
  NatureServe

NNR - Unranked

     
  Minnesota

not listed

     
           
           
           
 
Description
 
 

Dogwood twig borer is a small, flat-faced, long-horned beetle. The body is long, slender, and cylindrical. Mature adults are 5 16 to and less than wide.

The upper thoracic shield (pronotum) is cylindrical, wider than long, yellowish-tan, and smooth. The upper (dorsal) surface is convex with a black bump on each side and a black spot at the rear (posterior) margin.

The hardened wing covers (elytra) are yellowish-tan, pitted, slender, and slightly narrowed in the middle. On each elytrum there is a broad black stripe on the outer (lateral) margin and a narrow stripe on the inner (sutural) margin that pairs with the one on the opposite elyturm to make a broad central stripe. The small plate between the bases of the elytra (scutellum) is black.

The head is yellowish-tan. The face is nearly flat. The eyes are black and deeply notched. The bases of the antennae are inserted into the notch. The antennae are as slightly shorter to slightly longer than the body. The antennal segments are yellowish-tan at the base and black at the tip. The amount of black is variable, and occasionally the segments appear entirely black. The first segment is always entirely black. The outer margin of the mandible is nearly straight. The end segment of the finger-like process (palp) on the maxilla is pointed.

The legs are entirely yellowish-tan. The last part of each leg (tarsus), corresponding to the foot, has five segments but the first segment is minute, making it appear that there are only four segments.

 
     
 

Size

 
 

Total Length: 5 16 to

 
     
 

Similar Species

 
     
     
 
Habitat
 
 

 

 
     
 
Biology
 
 

Season

 
 

Late May to early August (Michigan)

 
     
 

Behavior

 
 

 

 
     
 

Life Cycle

 
 

The female creates a pair of slits in a twig and deposits a single egg. When the egg hatches, the larva bores into the twig to the center. The larva overwinters inside the twig.

 
     
 

Larva Food

 
 

Twigs and branches of mostly dogwood but also elm, viburnum, blueberry, Labrador tea, poplar, willow, and mulberry.

 
     
 

Adult Food

 
 

Leaves of mostly dogwood but also elm, viburnum, blueberry, Labrador tea, poplar, willow, and mulberry.

 
     
 
Distribution
 
 

Distribution Map

 

Sources

24, 27, 29, 30.

 
  10/12/2018      
         
 

Occurrence

 
 

Widespread

 
         
 
Taxonomy
 
 

Order

Coleoptera (beetles)  
 

Suborder

Polyphaga (water, rove, scarab, longhorn, leaf and snout beetles)  
 

Infraorder

Cucujiformia  
 

Superfamily

Chrysomeloidea (long-horned and leaf beetles)  
 

Family

Cerambycidae (long-horned beetles)  
 

Subfamily

Lamiinae (flat-faced longhorns)  
 

Tribe

Phytoeciini  
 

Genus

Oberea  
       
 

Synonyms

 
 

Oberea amabilis

Oberea deficiens

Oberea mandarina

Oberea tripunctata appalachiana

Oberea tripunctata intermedia

 
       
 

Common Names

 
 

dogwood twig borer

 
       

 

 

 

 

 

Glossary

Elytra

The hardened or leathery forewings on an insect used to protect the fragile hindwings, which are used for flying, in beetles and true bugs.

 

Pronotum

The saddle-shaped, exoskeletal plate on the upper side of the first segment of the thorax of an insect.

 

Scutellum

The exoskeletal plate covering the rearward (posterior) part of the middle segment of the thorax in some insects. In Coleoptera, Hemiptera, and Homoptera, the dorsal, often triangular plate behind the pronotum and between the bases of the front wings.

 

Tarsus

The last two to five subdivisions of an insect’s leg, attached to the tibia; the foot. Plural: tarsi.

 

 

 

 

 

 
 
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Alfredo Colon

 
    dogwood twig borer   dogwood twig borer  
           
    dogwood twig borer      
           
 
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  Alfredo Colon
6/11/2018

Location: Woodbury, Minnesota

dogwood twig borer  
  Alfredo Colon
6/8/2018

Location: Woodbury, MN

dogwood twig borer  
           
 
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