large rove beetle

(Belonuchus rufipennis)

               
Conservation Status

IUCN Red List

not listed

large rove beetle (Belonuchus rufipennis)

 

NatureServe

NNR - Unranked

Minnesota

not listed

Occurrence

 

Flight/Season

 

Habitat

Decaying organic matter, forest litter, tree holes

Size

Total Length: 3 16 to

          Photo by Alfredo Colon

Identification

Belonuchus rufipennis is a large, colorful, predatory, rove beetle. It is widespread in North America from the east coast to Ontario, and also occurs in Central and South America. It can be found in carrion, dung, decaying plant and fungi tissues, fermenting sap and fruit, and rotting organic matter in forest litter and tree holes.

Adults are slender, 3 16 to (4.6 to 9 mm) long, and superficially resemble earwigs.

The head is black, shiny, and constricted behind the eyes forming a short but distinct neck. The neck is broad, more than half as wide as the head, and is clearly visible when viewed from above. The compound eyes are small and are not protruding. The antennae have 11 segments and are moderately clubbed. The bases of the antennae are closer to the compound eye than they are to each other.

The exoskeletal plate covering the thorax (pronotum) black, shiny, and longer than wide. It has two rows of 4 or 5 punctures on top and a row of 5 or 6 punctures on each side.

The abdomen is long, nearly parallel-sided, and flexible. The hardened wing covers (elytra) are reddish-yellow or reddish-brown and do not overlap. They are short, exposing the last six abdominal segments. The first four of these segments are reddish-yellow or reddish-brown, the last two are black.

The legs are reddish-yellow and short. On the front and hind legs, the third leg segment (femur) is more spiny on the male than on the female.

The last part of each leg (tarsus), corresponding to the foot, has five segments.

 
Similar
Species

 


Larval Food

 

 
Adult Food

 

 
Life Cycle

 

 
Behavior

The flexible abdomen is sometimes held upward, even when running. It looks threatening, but it does not sting.


Distribution Distribution Map  

Sources: 24, 29, 30.


Comments

No Common Name
This species has no common name. The common name of the subfamily Staphylininae is large rove beetles, and is applied here for the sake of convenience.


Taxonomy

Order:

Coleoptera (beetles)

 

Suborder:

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

 

Infraorder:

Staphyliniformia

 

Superfamily:

Staphylinoidea (rove, carrion and fungus beetles)

 

Family:

Staphylinidae (rove beetles)

 

Subfamily:

Staphylininae (large rove beetles)

 

Tribe:

Staphylinini

 

Subtribe:

Philonthina

 
Synonyms

 

 
Common
Names

no common name


 

 

 

 

 

Glossary

Elytra

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

 

Femur

On insects and arachnids, the third, largest, most robust segment of the leg, coming immediately before the tibia. On humans, the thigh bone.

 

Pronotum

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

 

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


  large rove beetle (Belonuchus rufipennis)   large rove beetle (Belonuchus rufipennis)
       
  large rove beetle (Belonuchus rufipennis)    

       
       
       

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Alfredo Colon
6/22/2018

Location: Woodbury, Minnesota

large rove beetle (Belonuchus rufipennis)


     
     
 

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