ant-like longhorn beetle

(Cyrtophorus verrucosus)

               
Conservation Status

IUCN Red List

not listed

ant-like longhorn beetle

 

NatureServe

NNR - Unranked

Minnesota

not listed

Occurrence

Common

Flight/Season

March to July

Habitat

Deciduous woodlands

Size

Total Length: ¼ to 7 16 (7 to 11 mm)

          Photo by Bill Reynolds

Identification

Ant-like longhorn beetle is a small, round-necked, long-horn beetle. It is an ant mimic—it looks and runs like an ant. This is probably an example of Batesian mimicry, making it appear unpalatable to potential predators.

The body is ¼ to 7 16 (7 to 11 mm) long. It is constricted between the thorax and the abdomen, forming a distinct rounded “neck”. There are two forms of this beetle, a red form and a black form. The red form is probably a mimic of ferruginous carpenter ant (Camponotus chromaiodes) and the black form is probably a mimic of eastern black carpenter ant (Camponotus pennsylvanicus).

The face is slanted forward, not vertical. The small antennae-like structures (palps) emerging from the lower jaws (maxillae) are blunt at the tip, not pointed. The antennae are long, more than half as long as the body. On the female they reach the basal third of the hardened wing covers (elytra). The base of each antenna is usually reddish and is surrounded by the eye.

The exoskeletal plate covering the thorax (pronotum) is black, rounded and widest near the middle when viewed from above, and strongly convex when viewed from the side.

The elytra have a pair of pronounced knobs at the base. There are two diagonal lines of short white hairs just before the middle and a straight thin band of short white hairs just beyond the middle. On the red form, the basal portion of the elytra are reddish. On the black form, the basal portion is black. On both forms, the last (apical) portion is grayish-tan and densely hairy.

 
Similar
Species

 


Larval Food

Dead but not decayed wood of mostly deciduous but sometimes coniferous trees and shrubs

 
Adult Food

Nectar and/or pollen of trees and shrubs

 
Life Cycle

 

 
Behavior

They are attracted to lights.


Distribution Distribution Map  

Sources: 24, 27, 29, 30.


Comments

 


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:

Cerambycinae (round-necked long-horns)

 

Tribe:

Anaglyptini

 
Synonyms

 

 
Common
Names

ant mimic longhorned beetle

ant-like longhorn beetle


 

 

 

 

 

Glossary

Maxillae

Paired mouth structures of arthropods located immediately behind the mandible and used for tasting and manipulating food.

 

Palp

Short for pedipalp. A segmented, finger-like process of an arthropod; one is attached to each maxilla and two are attached to the labium. They function as sense organs in spiders and weapons in scorpions. Plural: palpi.

 

Pronotum

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

 

 

 

 

 

       

Visitor Photos

   
Share your photo of this insect.

Bill Reynolds


I found it on Gray Dogwood eating pollen.

  ant-like longhorn beetle   ant-like longhorn beetle

       
       
       

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Slideshows

   
  long-horned beetle (Cyrtophorus verrucosus)
Bill Keim
 
  long-horned beetle (Cyrtophorus verrucosus)  

 

slideshow

     

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Other Videos

 
  Longhorn Beetle (Cerambycidae: Cyrtophorus verrucosus) Ant Mimic
Carl Barrentine
 
   
 
About

Published on Jun 16, 2011

Photographed at Fisher, Minnesota (16 June 2011).

 
     
  Round-necked Longhorn Beetle (Cerambycidae: Cyrtophorus verrucosus) on Blossom
Carl Barrentine
 
   
 
About

Published on Jun 20, 2010

Photographed at Grand Forks, North Dakota (19 June 2010).

 
     

 

Camcorder

         

Visitor Sightings

   
Report a sighting of this insect.

Bill Reynolds
6/28/2019

Location: Pennington Co., MN

I found it on Gray Dogwood eating pollen.

ant-like longhorn beetle


     
     
 

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