Round fungus beetles

Definition

A family of small to minute beetles (Leiodidae) characterized by compact, often rounded bodies and strong ecological ties to fungal substrates, carrion, and subterranean habitats. Adults and larvae typically feed on fungal mycelia, spores, or decaying organic matter; many species exhibit specialized adaptations for burrowing in soil or colonizing vertebrate carcasses. The family encompasses several thousand species globally, with notable radiations in cave and deep-soil habitats.

Etymology

From English 'round' (body shape) + 'fungus' (primary food substrate) + 'beetles' (common name for Coleoptera)

Example

The genus *Ptomaphagus* includes numerous round fungus beetle species adapted to perpetual darkness in North American caves, where they complete their entire life cycles on guano and fungal films in the absence of light.

Synonyms

• Leiodidae

Related Terms

• Carrion beetles
• Fungus beetles
• Cave beetles
• Myrmecophily
• Saprophagy
• Coleoptera

Usage Notes

The common name applies specifically to family Leiodidae, not to other beetles with rounded bodies that feed on fungi. Some subfamilies (e.g., Cholevinae) are frequently treated as 'small carrion beetles' due to habitat overlap with Silphidae. Specialist literature often uses 'Leiodidae' exclusively; 'round fungus beetles' appears more frequently in field guides and regional faunal works.