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Forked Fungus Beetle (Bolitotherus cornutus) - Courting On Ganoderma curtisii (Golden Reishi) by an old rotted Willow Oak in a backyard habitat.<br />
<br />
Bolitotherus cornutus is darkling beetle which feeds on species of Ganoderma (Reishi) fungi. This species exhibits sexual dimorphism; males have a pair of prominent forward-facing horns on the thorax. Note the tiny cephalic horns (on the head)! <br />
<br />
B. cornutus has an interesting mating ritual which is performed upon the host fungus. The male grips the elytra of the female, placing his thorax over the end of her abdomen. This puts him in an opposing position to the female (seen in the photos). This courting behavior lasts for several hours and is followed by the reversal of positions and the alignment of abdomens for successful copulation. This act must be fully consensual as the female has thick plates on her back which must be voluntarily opened to allow for the transfer of the spermatophore.<br />
<br />
Side note: The hairy thoracic horns are used in pushing around other males whilst competing for mates and territories. <br />
<br />
<figure class="photo"><a href="https://www.jungledragon.com/image/60813/forked_fungus_beetle_bolitotherus_cornutus.html" title="Forked Fungus Beetle (Bolitotherus cornutus)"><img src="https://s3.amazonaws.com/media.jungledragon.com/images/3231/60813_thumb.jpg?AWSAccessKeyId=05GMT0V3GWVNE7GGM1R2&Expires=1574899210&Signature=mtSOGsH6H3xB7RG3vALXob3OcI0%3D" width="200" height="134" alt="Forked Fungus Beetle (Bolitotherus cornutus) On Ganoderma curtisii (Golden Reishi) by an old rotted Willow Oak in a backyard habitat.<br />
<br />
Bolitotherus cornutus is darkling beetle which feeds on species of Ganoderma (Reishi) fungi. This species exhibits sexual dimorphism; males have a pair of prominent forward-facing horns.<br />
<br />
B. cornutus has an interesting mating ritual which is performed upon the host fungus. The male grips the elytra of the female, placing his thorax over the end of her abdomen, placing him in an opposing position to the female (seen in the photos). This courting behavior lasts for several hours and is followed by the reversal of positions and the alignment of abdomens for successful copulation.<br />
<br />
https://www.jungledragon.com/image/60812/forked_fungus_beetle_bolitotherus_cornutus.html<br />
https://www.jungledragon.com/image/60814/forked_fungus_beetle_bolitotherus_cornutus.html Bolitotherus cornutus,Forked fungus beetle,Geotagged,Spring,United States" /></a></figure><br />
<figure class="photo"><a href="https://www.jungledragon.com/image/60814/forked_fungus_beetle_bolitotherus_cornutus.html" title="Forked Fungus Beetle (Bolitotherus cornutus)"><img src="https://s3.amazonaws.com/media.jungledragon.com/images/3231/60814_thumb.jpg?AWSAccessKeyId=05GMT0V3GWVNE7GGM1R2&Expires=1574899210&Signature=YXUCFTEY%2BvXv3wAxSD3IFkxAaaA%3D" width="200" height="132" alt="Forked Fungus Beetle (Bolitotherus cornutus) On Ganoderma curtisii (Golden Reishi) by an old rotted Willow Oak in a backyard habitat.<br />
<br />
Bolitotherus cornutus is darkling beetle which feeds on species of Ganoderma (Reishi) fungi. This species exhibits sexual dimorphism; males have a pair of prominent forward-facing horns.<br />
<br />
B. cornutus has an interesting mating ritual which is performed upon the host fungus. The male grips the elytra of the female, placing his thorax over the end of her abdomen. This puts him in an opposing position to the female (seen in the photos). This courting behavior lasts for several hours and is followed by the reversal of positions and the alignment of abdomens for successful copulation.<br />
<br />
https://www.jungledragon.com/image/60812/forked_fungus_beetle_bolitotherus_cornutus.html<br />
https://www.jungledragon.com/image/60813/forked_fungus_beetle_bolitotherus_cornutus.html Bolitotherus cornutus,Forked fungus beetle,Geotagged,Spring,United States" /></a></figure> Bolitotherus cornutus,Forked fungus beetle,Geotagged,Spring,United States,beetle,beetles,coleoptera,coleopteran,coleopterans,darkling beetle,darkling beetles Click/tap to enlarge PromotedSpecies introCountry intro

Forked Fungus Beetle (Bolitotherus cornutus) - Courting

On Ganoderma curtisii (Golden Reishi) by an old rotted Willow Oak in a backyard habitat.

Bolitotherus cornutus is darkling beetle which feeds on species of Ganoderma (Reishi) fungi. This species exhibits sexual dimorphism; males have a pair of prominent forward-facing horns on the thorax. Note the tiny cephalic horns (on the head)!

B. cornutus has an interesting mating ritual which is performed upon the host fungus. The male grips the elytra of the female, placing his thorax over the end of her abdomen. This puts him in an opposing position to the female (seen in the photos). This courting behavior lasts for several hours and is followed by the reversal of positions and the alignment of abdomens for successful copulation. This act must be fully consensual as the female has thick plates on her back which must be voluntarily opened to allow for the transfer of the spermatophore.

Side note: The hairy thoracic horns are used in pushing around other males whilst competing for mates and territories.

Forked Fungus Beetle (Bolitotherus cornutus) On Ganoderma curtisii (Golden Reishi) by an old rotted Willow Oak in a backyard habitat.<br />
<br />
Bolitotherus cornutus is darkling beetle which feeds on species of Ganoderma (Reishi) fungi. This species exhibits sexual dimorphism; males have a pair of prominent forward-facing horns.<br />
<br />
B. cornutus has an interesting mating ritual which is performed upon the host fungus. The male grips the elytra of the female, placing his thorax over the end of her abdomen, placing him in an opposing position to the female (seen in the photos). This courting behavior lasts for several hours and is followed by the reversal of positions and the alignment of abdomens for successful copulation.<br />
<br />
https://www.jungledragon.com/image/60812/forked_fungus_beetle_bolitotherus_cornutus.html<br />
https://www.jungledragon.com/image/60814/forked_fungus_beetle_bolitotherus_cornutus.html Bolitotherus cornutus,Forked fungus beetle,Geotagged,Spring,United States

Forked Fungus Beetle (Bolitotherus cornutus) On Ganoderma curtisii (Golden Reishi) by an old rotted Willow Oak in a backyard habitat.<br />
<br />
Bolitotherus cornutus is darkling beetle which feeds on species of Ganoderma (Reishi) fungi. This species exhibits sexual dimorphism; males have a pair of prominent forward-facing horns.<br />
<br />
B. cornutus has an interesting mating ritual which is performed upon the host fungus. The male grips the elytra of the female, placing his thorax over the end of her abdomen. This puts him in an opposing position to the female (seen in the photos). This courting behavior lasts for several hours and is followed by the reversal of positions and the alignment of abdomens for successful copulation.<br />
<br />
https://www.jungledragon.com/image/60812/forked_fungus_beetle_bolitotherus_cornutus.html<br />
https://www.jungledragon.com/image/60813/forked_fungus_beetle_bolitotherus_cornutus.html Bolitotherus cornutus,Forked fungus beetle,Geotagged,Spring,United States

    comments (8)

  1. Ooh! Love this!! Are the horns fuzzy? They look it <3 Posted one year ago
    1. Yes, there are little hairs on the undersides! I was reading more about these lovely beetles and it seems that this act MUST BE consensual! So cool!

      The female has thick plates on her back which must be voluntarily opened to allow for the transfer of the spermatophore!
      Posted one year ago
      1. Nice!! Posted one year ago
    2. Added a little note about the hairy horns! :D Posted one year ago
  2. Extraordinary species, and very well described as always! Posted one year ago
    1. I thought so too! There were individuals all over the mushrooms, however, this was the only pair!

      OH, and I added an extra note about the "hairy" horns in the description! I couldn't resist!
      Posted one year ago
      1. By all means don't resist :) Posted one year ago
  3. So interesting and so.... good to know! Females triumph again! Lol! Posted one year ago

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''Bolitotherus cornutus'' is a North American species of darkling beetle known as the forked fungus beetle. As a holometabolic insect, its life cycle includes four life stages: egg, larva, pupa, and adult. All life stages are associated with the fruiting bodies of a wood-decaying shelf fungus, commonly ''Ganoderma applanatum'', ''Ganoderma tsugae'', and ''Ganoderma lucidum''.

Similar species: Beetles
Species identified by Lisa Kimmerling
View Lisa Kimmerling's profile

By Lisa Kimmerling

All rights reserved
Uploaded May 31, 2018. Captured May 30, 2018 02:58 in 101-115 Earl St, Plainville, GA 30733, USA.
  • Canon EOS DIGITAL REBEL XTi
  • f/7.1
  • 1/400s
  • ISO400
  • 60mm