Species Bolitotherus cornutus - Forked Fungus Beetle

Horned Darkling Beetle

Bolitophagus cristatus Gosse 1840(1)

Bolitotherus cornutus (Panzer 1794)

10-12 mm(2)

The male has a pair of stout, forward pointing horns

NA (NS-FL to AB-MO-TX)(1)

on hard shelf fungi or in crevices in bark where fungi are attached; especially common on beech and maple trees/logs; active at night(3); under bark(4)

Feeds on fungi - Ganoderma alanatum and G. lucidum (from this Comment)

Fungus with tunnels; tunnel; larva; pupa; adult; fungus with frass, fungus debris and adults

Beetles always make the entrances through the top of the sporocarp, whether they are living in Ganoderma applanatum in the northern part of their range or in G. lucidum in the southern part... Those living in the north are generally of a lighter color than those in the south, which tend to be black rather than cocoa brown. (Comment here)

Feign death when disturbed and live more than two years in nature(4)

Bolitophagus corticola is smaller, with no horns