margined carrion beetle

(Oiceoptoma noveboracense)

Conservation Status
margined carrion beetle
  IUCN Red List

not listed

     
  NatureServe

NNR - Unranked

     
  Minnesota

not listed

     
           
           
           
 
Description
 
 

Margined carrion beetle is a to ½ long carrion beetle found mostly in deciduous forests. These beetles are used by crime scene investigators to estimate post mortem intervals (PMI).

The pronotum is dark brown or black with with orange-red lateral margins. The orange-red area does not extend across the lower margin.

The thick, hardened, shell-like forewings (elytra) are dark brown and have a distinctive tooth on the shoulder. Conspicuous vertical ridges extend from the base over more than half the length of the elytra. The elytra ends are rounded on males, more tapered on females.

The temples behind the eyes bear a row of long, erect, yellow-tinted bristles.

The metatibiae are enlarged on males.

 
     
 

Size

 
 

to ½

 
     
 

Similar Species

 
 

American carrion beetle (Necrophila americana) is larger, ½ to ¾ long. The pronotum has yellow margins and a black mark that does not extend to the lower margin.

Ridged carrion beetle (Oiceoptoma inaequale) has an entirely black pronotum with no colored margins.

 
     
 
Habitat
 
 

Deciduous forests.

 
     
 
Biology
 
 

Season

 
 

April to October

 
     
 

Behavior

 
 

 

 
     
 

Life Cycle

 
 

Adults overwinter and reproduction takes place in the spring. There is one generation per year.

 
     
 

Larva Food

 
 

Carrion, decaying fungi.

 
     
 

Adult Food

 
 

Fly larvae on carrion and, rarely, the carrion itself.

 
     
 
Distribution
 
 

Distribution Map

 

Sources

24, 27, 29, 30, 82.

 
  2/25/2021      
         
 

Occurrence

 
 

 

 
         
 
Taxonomy
 
 

Order

Coleoptera (beetles)  
 

Suborder

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

Infraorder

Staphyliniformia  
 

Superfamily

Staphylinoidea (rove, carrion and fungus beetles)  
 

Family

Silphidae (carrion beetles)  
 

Subfamily

Silphinae  
 

Genus

Oiceoptoma  
       
 

Synonyms

 
 

Silpha noveboracensis

Oiceoptoma noveboracensis

 
       
 

Common Names

 
 

margined carrion beetle

 
       

 

 

 

 

 

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.

 

Metatibia

Hind tibia. The hind portion of the fourth segment of an insect leg.

 

Pronotum

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

 

Tibia

The fourth segment of an insect leg, after the femur and before the tarsus (foot).

 
 
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MinnesotaSeasons.com Photos
 
 

Female

 
    margined carrion beetle      
           

 

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Other Videos
 
  Deer carcass fauna
weirdbuglady
 
   
 
About

Published on Jun 14, 2012

My lab mates and I pulled up to a field site, and smelled something funny. Turns out there was a decaying deer carcass in the grass. Being entomologists, we had to get a closer look at the insect life.

I have identified the carrion beetle: Oiceoptoma noveboracense. It is in the family Silphidae, the carrion beetles. I observed it attacking, carrying, and eating one of the maggots.

 
       

 

Camcorder

 
 
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