Ernobius

Ernobius is a genus of beetles belonging to the family Ptinidae, commonly known as spider beetles. They are small, cylindrical beetles, often brown or reddish-brown in color, and characterized by their hunched-over appearance, resembling spiders, which gives them their common name.

Ernobius beetles are typically found in decaying wood, particularly coniferous trees. They are xylophagous, meaning they feed on wood, and their larvae bore into the wood, creating tunnels and galleries. This can lead to structural damage in wooden buildings and furniture.

Several species are included within the genus Ernobius, with varying geographic distributions. Identification to the species level often requires microscopic examination of specific morphological features.

These beetles can be considered pests, especially in areas with old wooden structures or timber storage facilities. Control measures often involve eliminating sources of dampness and decay, treating infested wood with insecticides, or replacing damaged wood.