Nitidulidae

Definition

A family of small to medium-sized beetles (order Coleoptera, superfamily Cucujoidea) commonly known as sap beetles, characterized by short elytra that often leave abdominal tergites exposed, clubbed antennae, and association with fermenting plant exudates, fungi, or decaying organic matter. The family comprises approximately 2,000–3,000 species in roughly 200 genera, distributed across ten recognized subfamilies including Nitidulinae, Carpophilinae, and Cryptarchinae.

Etymology

From Nitidula (type genus, Latin nitidus 'shiny, polished') + -idae (family suffix)

Example

Glischrochilus quadrisignatus (four-spotted sap beetle), a common Nitidulidae species in North America, aggregates at wounds on oak trees to feed on fermenting sap and can become a significant pest in sweet corn when populations spill over from alternative hosts.

Synonyms

• Sap beetles

Related Terms

• Coleoptera
• Cucujoidea
• Polyphaga
• elytron
• saproxylic
• Glischrochilus
• Carpophilus
• mycophagy

Usage Notes

The common name 'sap beetle' reflects the family's ecological association with exuding plant fluids, though many species also exploit fungi, pollen, or carrion. Nitidulidae are distinguished from similar short-winged beetles (e.g., some Staphylinidae) by their clubbed antennae with three-segmented clubs and the structure of the abdominal apex. Several species are economically important as pests of stored products, ripening fruit, or brewery contaminants. The family is sometimes split into subfamilies with differing ecological specializations—Meligethinae (pollen beetles) were historically treated as a separate family.