Oedemeridae

Oedemeridae is a family of beetles commonly known as false blister beetles or pollen-feeding beetles. They are a diverse group found worldwide, inhabiting a variety of environments, though they are most prevalent in tropical and subtropical regions. Adult Oedemeridae are typically medium-sized beetles, often elongated and somewhat slender. Their coloration varies greatly, ranging from dull browns and blacks to vibrant metallic greens and blues, and some species exhibit striking patterns. A common characteristic is their soft elytra, which are not hardened like those of many other beetle families.

The larvae of Oedemeridae are wood borers, feeding on decaying wood or herbaceous plant stems. This larval stage can sometimes be a pest in timber, though usually not to a significant degree. The adult beetles, on the other hand, are primarily pollen feeders, visiting flowers to consume pollen and nectar. This feeding behavior makes them important, albeit often overlooked, pollinators. Their common name, false blister beetle, derives from the fact that some species can secrete a hemolymph containing cantharidin when disturbed, similar to true blister beetles (Meloidae), which can cause blistering on human skin. However, not all Oedemeridae species produce this chemical. The family is comprised of numerous genera and species, and ongoing research continues to clarify their evolutionary relationships and ecological roles.