Actidium

Actidium is a genus of minute moss beetles belonging to the Ptiliidae family. These beetles are characterized by their extremely small size, typically less than one millimeter in length. Actidium beetles are found in damp environments such as leaf litter, decaying wood, and fungi. They are thought to feed on fungal spores and decaying organic matter. The genus is widespread, with species occurring in various regions around the world. Identification to the species level often requires microscopic examination of minute morphological details. The Ptiliidae family as a whole is known for its complex wing-folding mechanisms that allow these tiny beetles to effectively fly despite their size.