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Pleasing Fungus Beetle (Megalodacne heros)


Detailing the physical features, habits, territorial reach and other identifying qualities of the Pleasing Fungus Beetle.




Look for this beetle where groups of disc-like bracket fungi pop out of tree trunks.



 Updated: 6/8/2020; Authored By Staff Writer; Content ¬©www.InsectIdentification.org




Bracket fungi look like saucers with gills underneath, and they grow on tree bark. This type of fungus is what Pleasing Fungus Beetle larvae use for food and development, tunneling into a mushroom that is stuck on wood. Adults are long and black with two bands that may be yellow or appear orange. The band near the head has irregular shaping, and the band near the rear end is bulky with jagged edges.

This beetle is nocturnal, hiding among foliage and wood during the day. It is not uncommon to see many in a group, huddled together under wood stacks and fallen trees. Because the host fungus is only found on trees in shady woods, look for this beetle in moist or humid areas in forests. Inspect a bracket mushroom cluster for them and perhaps nearby. Admiring their color and puzzle-piece pattern up close and in person makes it worth the effort.


General Characteristics
Capability, Shape, Texture/Pattern, Benefits, Dangers
Shiny insect icon
Striped or banded insect icon


Taxonomic Hierarchy
Species Breakdown
Kingdom: Animalia
  Phylum: Arthropoda
    Class: Insecta
      Order: Coleoptera
        Family: Erotylidae [ View More ]
          Genus: Megalodacne [ View More ]
            Species: heros
Identifying Information
Size, Colors, Descriptors
Scientific Name: Megalodacne heros
Category: Beetle
Size (Adult; Length): 14mm to 22mm (0.55in to 0.86in)
Colorwheel Graphic Colors: black; yellow; orange
Descriptors: long; shiny; yellow bands; zigzag; puzzle
Relative Size Comparison
Lo: 14mm | Hi: 22mm
Territorial Reach (A-to-Z)
U.S., Canada, and Mexico
Alabama
Alaska
Arizona
Arkansas
California
Colorado
Connecticut
Delaware
Florida
Georgia
Hawaii
Idaho
Illinois
Indiana
Iowa
Kansas
Kentucky
Louisiana
Maine
Maryland
Massachusetts
Michigan
Minnesota
Mississippi
Missouri
Montana
Nebraska
Nevada
New Hampshire
New Jersey
New Mexico
New York
North Carolina
North Dakota
Ohio
Oklahoma
Oregon
Pennsylvania
Rhode Island
South Carolina
South Dakota
Tennessee
Texas
Utah
Vermont
Virginia
Washington
West Virginia
Wisconsin
Wyoming
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Alberta
British Columbia
Manitoba
New Brunswick
Newfoundland and Labrador
Nova Scotia
Ontario
Prince Edward Island
Quebec
Saskatchewan
Mexican National Flag Graphic
Mexico
Note: An insect's reach is not limited by lines drawn on a map and therefore species may appear in areas, regions and/or states beyond those listed above as they are driven by environmental factors (such as climate change), available food supplies and mating patterns.
Territorial Map
U.S., Canada, and Mexico
Alaska  
Hawaii  
Prince Edward Is.  
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Canadian territory of Alberta graphic
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Canadian territory of Newfoundland and Labrador graphic
Canadian territory of Ontario graphic
Canadian territory of Quebec graphic
Canadian territory of Saskatchewan graphic
Territory map graphic of the country of Mexico
Contiguous United States shape map layer graphic


Beetle Anatomy
Graphic showing basic anatomy of a common North American Beetle insect
1
Antennae: Beetles have a pair of antennae on the head used for sensing.
2
Head: The head is home to the insect's eyes, antennae, and mandibles (jaws).
3
Thorax: Holds the three pairs of legs as well as vital internal organs.
4
Elytron: One of two wing cases on a Beetle that protects its wings (plural: elytra).
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Wings: Appendages used for flying and kept under the elytra until needed.
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Abdomen: Houses organs related to circulation, reproduction, and excretion.
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Legs: Beetles have three pairs of legs located at the thorax, numbering six legs in all.