ant-like longhorn beetle

(Cyrtophorus verrucosus)

Conservation Status
ant-like longhorn beetle
Photo by Babette Kis
  IUCN Red List

not listed

 
  NatureServe

NNR - Unranked

 
  Minnesota

not listed

 
           
           
           
           
           
           
 
Description
 
 

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 (palpi) 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, strongly convex when viewed from the side.

The hardened forewings (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.

 
     
 

Size

 
 

Total length: ¼ to 7 16 (7 to 11 mm)

 
     
 

Similar Species

 
     
     
 
Habitat
 
 

Deciduous woodlands

 
     
 
Biology
 
 

Season

 
 

March to July

 
     
 

Behavior

 
 

Adults are attracted to lights.

 
     
 

Life Cycle

 
 

 

 
     
 

Larva 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

 
     
 
Distribution
 
 

Distribution Map

 

Sources

24, 27, 29, 30, 82.

 
  10/4/2022      
         
 

Occurrence

 
 

 

 
         
 
Taxonomy
 
 

Order

Coleoptera (beetles)  
 

Suborder

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

Infraorder

Cucujiformia  
 

Superfamily

Chrysomeloidea (longhorn beetles and allies)  
 

Family

Cerambycidae (longhorn beetles)  
 

Subfamily

Cerambycinae (typical longhorn beetles)  
 

Tribe

Anaglyptini  
 

Genus

Cyrtophorus  
       
 

Synonyms

 
 

 

 
       
 

Common Names

 
 

ant mimic longhorned beetle

ant-like longhorn beetle

 

 

 

 

 

 

 

 

Glossary

Elytra

The hardened or leathery forewings of beetles used to protect the fragile hindwings, which are used for flying. Singular: elytron.

 

Maxillae

Paired mouth structures of arthropods located immediately behind the mandible and used for tasting and manipulating food. “Under-jaws”.

 

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 insects, and as weapons in scorpions. Plural: palpi or palps.

 

Pronotum

The exoskeletal plate on the upper side of the first segment of the thorax of an insect.

 

 

 

 

 

 
 
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Alfredo Colon

 
    ant-like longhorn beetle   ant-like longhorn beetle  
           
    ant-like longhorn beetle      
 

Babette Kis

 
 

Cyrtophorus verrucosus ant-mimic longhorn beetle

Cyrtophorus verrucosus, ant-mimic longhorn beetle, photographed at Barnes Prairie, near the hedgerow, on June 7, 2021.

  ant-like longhorn beetle  
           
  It's about 10mm long, without the antennae.   ant-like longhorn beetle  
 

Bill Reynolds

 
  I found it on Gray Dogwood eating pollen.   ant-like longhorn beetle  
           
        ant-like longhorn beetle  
           
 
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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
 
           
 

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  Babette Kis
6/7/2021

Location: Barnes Prairie, Racine Co., WI

Cyrtophorus verrucosus ant-mimic longhorn beetle
Description: Cyrtophorus verrucosus, ant-mimic longhorn beetle, photographed at Barnes Prairie, near the hedgerow, on June 7, 2021. It's about 10mm long, without the antennae.

ant-like longhorn beetle  
  Alfredo Colon
6/4/2021

Location: Woodbury, MN

ant-like longhorn beetle  
  Alfredo Colon
6/3/2021

Location: Woodbury, MN

ant-like longhorn beetle  
  Jaimie Johnson
5/9/2021

Location: Stillwater, MN - Teddy Bear Park

I felt a bite on my collarbone and another under my shirt shortly after.  I found this beetle crawling on the hem of my shirt about 10 minutes later.

 
  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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Created: 6/30/2019

Last Updated:

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